Question 1

The technical standards for how the World Wide Web works are developed and maintained by which international organisation?

Accepted Answer

Introduction / Context: The World Wide Web relies on common technical standards so that web pages created in one part of the world can be viewed correctly by browsers everywhere. These standards cover languages such as HTML and CSS, as well as protocols and best practices. This question tests your knowledge of which international body is responsible for developing and maintaining most of the key Web standards that make the modern Internet work smoothly. Given Data / Assumptions: The focus is specifically on the World Wide Web, not the entire Internet infrastructure. The organisation in question creates and maintains technical standards. It is an international body involving multiple members from industry and academia. Some options are real sounding but incorrect expansions or invented names. Concept / Approach: The main organisation responsible for standardising core web technologies is the W3C, which stands for the World Wide Web Consortium. It was founded by Tim Berners Lee, the inventor of the Web. W3C works through working groups and recommendations to define specifications for HTML, CSS, XML, accessibility guidelines and many other web technologies. Some other bodies also define related standards (for example, IETF for Internet protocols), but for the Web layer itself, W3C is the commonly recognised standards body. Therefore we must pick the option that correctly names W3C and expands its full form properly. Step-by-Step Solution: Step 1: Focus on the phrase World Wide Web and standard, which points to the community that defines how web pages are structured and displayed. Step 2: Recall that W3C is widely mentioned in documentation for HTML, CSS and other web technologies as the recommending authority. Step 3: Identify that W3C expands to World Wide Web Consortium, not to generic phrases like World Wide Consortium or World Wide Web Standard. Step 4: Check the options and select the one that both includes W3C and states its correct full form. Step 5: Reject other options that sound similar but are either incomplete or not real official bodies. Verification / Alternative check: Official documentation for web technologies typically states that a specification is a W3C Recommendation. Browser vendors talk about implementing W3C standards to ensure compatibility. The W3C website itself lists member organisations, working groups and a long list of Recommendations and Notes. By contrast, names like World Wide Web Standard or Worldwide Corporation for Networking do not appear in serious technical references as governing bodies. This confirms that W3C (World Wide Web Consortium) is the correct answer for web standards. Why Other Options Are Wrong: World Wide Web Standard: Sounds like a concept, not the name of an organisation; there is no single body officially called this. Worldwide Corporation for Networking: An invented name that is not associated with Web standards. World Wide Consortium: Incomplete and vague; it omits the word Web and is not the official name. UN Internet Standards Council: The United Nations does not run a specific council under this name for Web standards. Common Pitfalls: Students may confuse web standards with general Internet standards and think of bodies like IETF or ISO. Others may see the phrase World Wide Consortium and assume it is just another way of writing W3C, but exam questions are usually precise about official names. To remember, note that W3C literally stands for three W characters and a C: World Wide Web Consortium. Whenever you see a question about World Wide Web standards, W3C should be your first thought. Final Answer: The technical standards for the World Wide Web are created and maintained by W3C (World Wide Web Consortium).

Question 2

In the context of database and business applications, a report generator is primarily used to do which of the following tasks?

Accepted Answer

Introduction / Context: In business information systems, organisations store data in files or databases and then need to extract that data in a readable, summarised form. A common tool for this purpose is a report generator. Understanding what a report generator does helps you distinguish it from other tools used for data entry, file maintenance and backup. This question tests whether you know the main function of a report generator in typical office or database software. Given Data / Assumptions: We are working in a database or business application environment. There are existing data files or database tables. The tool mentioned is a report generator, often part of an application package. Options mention printing, data entry, file updating and backups. Concept / Approach: A report generator is a software tool that allows users to design and produce formatted reports from stored data. Users specify which fields to include, how to group or summarise data and how it should appear on paper or on screen. The generator then reads data from the database and outputs human friendly reports. It is not primarily used for entering new data or updating records, although some integrated systems may include these functions in other modules. Its core purpose is report creation and printing, not general file maintenance or backup. Step-by-Step Solution: Step 1: Note the word report, which suggests summarised, formatted output rather than raw data manipulation. Step 2: Recall that a report generator usually allows you to design layouts with headings, totals and groupings, and then print or preview them. Step 3: Understand that data entry is typically done through input forms or transaction screens, not through the report generator. Step 4: Recognise that file updating (insert, update, delete) is carried out by database management systems and application logic, not by the report printing module. Step 5: Therefore, choose the option that describes printing files and structured reports as the primary purpose of a report generator. Verification / Alternative check: Documentation for common database tools like Oracle Reports, Crystal Reports or the report modules in ERP systems emphasises designing and printing reports from existing data. Tutorials show steps for selecting fields, grouping records and printing invoices, statements or summaries. They do not describe a report generator as the main interface for entering or editing data. Backup and restore features are part of database administration, not report design. This consistent description in practical tools confirms that the primary use is to generate and print reports based on stored data. Why Other Options Are Wrong: Perform interactive data entry into forms: Data entry is handled by input forms or transaction screens, not by the report generator itself. Update and modify master files directly: File maintenance operations are done by database utilities or application logic, not by the reporting module. All of the above: Overstates the role of a report generator, mixing several different functions into one tool. Back up data to external storage: Backup utilities or DBMS tools manage backups, not report generators. Common Pitfalls: Students sometimes see the phrase report generator in a multiple choice question and choose All of the above, assuming that modern software can do everything. While integrated software packages may contain many modules, each module has a primary function. The report generator's specific job is to convert stored data into readable, usually printed, reports. Remember this focus on output, not input or maintenance, to answer similar questions correctly. Final Answer: In database and business applications, a report generator is primarily used to print files and structured reports on paper or screen based on stored data.

Question 3

In a typical personal computer, when you save a file from an application, it is normally stored on which main storage device?

Accepted Answer

Introduction / Context: When you work with documents, images or other data on a computer, you usually want your work to remain available even after you turn the machine off. This means the data must be written to some form of non volatile storage. Understanding where saved files actually live helps you grasp the difference between temporary memory and permanent storage. This question asks which device typically stores files when you choose the save command in everyday applications. Given Data / Assumptions: The context is a normal desktop or laptop computer used by a general user. The user saves files such as documents or photos from applications. We consider standard system configuration without exotic network storage. Options mention hard disk, cache, RAM and an all of the above choice. Concept / Approach: Saved files need to remain available after the power is turned off. This requires non volatile storage such as a hard disk drive (HDD) or solid-state drive (SSD). When you click Save, the operating system writes the file data from RAM to the disk. Cache and RAM are types of volatile memory: they hold data only temporarily while the computer is running. They are essential for speed but not for long term storage. Therefore, the correct answer is the hard disk or internal SSD, which acts as the main file storage device on most personal computers. Step-by-Step Solution: Step 1: Note that saved files must persist beyond the current session, even after shutdown. Step 2: Recall that RAM loses all contents when the power is turned off, so it cannot hold saved files permanently. Step 3: Processor cache is an even smaller, faster volatile memory used internally by the CPU, and also loses data on power off. Step 4: Recognise that the hard disk or internal SSD is designed for long term storage and keeps data even without power. Step 5: Conclude that the normal destination for saved files is the hard disk or internal SSD, not RAM, cache or the monitor. Verification / Alternative check: If you open a file explorer window, you can see your saved documents listed under folders on drives such as C: or D:. These represent partitions on physical disks or SSDs. After shutting down and restarting your computer, the files are still there, confirming that they reside on non volatile storage. Technical documentation also labels hard drives and SSDs as secondary storage used to hold the operating system, applications and user data. RAM and cache are consistently described as temporary, volatile memories, reinforcing the conclusion that saved files live on disk, not in RAM or cache. Why Other Options Are Wrong: Processor cache memory: Used to speed up CPU access to frequently used data, but it is small and volatile, not a file storage location. RAM (main memory): Holds data temporarily while programs run; its contents are lost when the system powers off. Any of the above equally: Incorrect because only non volatile storage such as the hard disk or SSD retains files permanently. Only on the monitor screen: The monitor just displays data; it is not a storage device at all. Common Pitfalls: Some beginners say their files are stored in the computer or in memory without distinguishing between RAM and disk. Others think that because they can still see a document on the screen, it must be saved, even if it is only in memory. To avoid data loss, it is essential to understand that until data is written to disk, it is not safely stored. Remember that save means copy from RAM to a non volatile storage device, usually the hard disk or an SSD. Final Answer: When you save a file on a typical computer, it is normally stored on the hard disk or internal solid-state drive.

Question 4

In computer hardware, is DRAM (Dynamic Random Access Memory) considered volatile or nonvolatile, and what does that mean for stored data when power is turned off?

Accepted Answer

Introduction / Context: DRAM, or Dynamic Random Access Memory, is one of the most common types of main memory used in computers. Understanding whether it is volatile or nonvolatile helps explain why you must save your work to disk and what happens to data during a power loss. This question tests your basic knowledge of memory characteristics and the meaning of the terms volatile and nonvolatile in computer hardware. Given Data / Assumptions: We are talking specifically about DRAM, not flash memory or ROM. DRAM is used as main system memory in most PCs and laptops. The property of interest is whether data remains when power is turned off. Options distinguish between volatile and nonvolatile behaviour. Concept / Approach: DRAM stores each bit of data as an electric charge in a tiny capacitor. Over time, this charge leaks away, so the memory must be refreshed periodically by reading and rewriting it, even while the system is powered on. When power is removed, the capacitors can no longer hold their charges, and all stored information is lost. This is the definition of volatile memory: it requires continuous power to maintain stored data. Nonvolatile memories such as flash storage or ROM keep their contents without power. Therefore, DRAM is clearly volatile memory. Step-by-Step Solution: Step 1: Recall that DRAM is used as the main working memory in most computers, holding running programs and active data. Step 2: Understand that the dynamic in DRAM refers to the need for constant refresh cycles to maintain stored bits. Step 3: Recognise that when power is cut, refresh stops and the stored charges quickly disappear, erasing the data. Step 4: Match this behaviour to the definition of volatile memory, which depends on continuous power for data retention. Step 5: Choose the option stating that DRAM is volatile and loses its data when power is turned off. Verification / Alternative check: Technical literature describes DRAM as a type of volatile semiconductor memory. PC manuals warn users that unsaved work in programs will be lost if the computer loses power or crashes, because that work resides in RAM. Memory controller specifications include refresh intervals for DRAM, which are not needed for nonvolatile memories. In contrast, storage technologies such as NAND flash or SSDs explicitly advertise nonvolatile properties. These standard descriptions and warnings confirm that DRAM is volatile and cannot preserve data when the system is powered down. Why Other Options Are Wrong: Nonvolatile memory that keeps data even when power is off: This describes flash memory or ROM, not DRAM. Partly volatile and partly nonvolatile memory: DRAM is entirely volatile; there is no permanent part. Neither volatile nor nonvolatile; it is only cache: DRAM can be used for cache in some systems, but the question is about its data retention characteristics. Nonvolatile memory that only sometimes loses data: Nonvolatile memory should not lose data simply because power is turned off; DRAM does, so this description is inaccurate. Common Pitfalls: Students sometimes confuse RAM with storage because both hold data. A good rule is that RAM (especially DRAM) forgets everything when the computer is off, while storage like SSDs and hard disks remember data. Another mistake is to assume that because some RAM modules have backup batteries or standby power in special systems, the memory type itself is nonvolatile. In standard PCs and laptops, DRAM behaves as volatile memory. Always associate DRAM with fast, temporary working storage that must be refreshed and that loses data without power. Final Answer: DRAM is volatile memory that loses its data when power is turned off and therefore must be backed by nonvolatile storage for long term data retention.

Question 5

In a basic computer system, the memory unit is considered to be part of which major component?

Accepted Answer

Introduction / Context: In logical block diagrams of computers, the overall system is often divided into major units such as input, output, memory and processing. Some simplified textbooks treat the memory unit as closely integrated with the Central Processing Unit (CPU), while more detailed diagrams draw it as a separate block connected to the CPU. This question reflects the common introductory view and asks which major component the memory unit is considered to belong to in that simplified classification. Given Data / Assumptions: We are using a basic block diagram model taught in introductory computer courses. The system is divided into input unit, output unit, memory unit and CPU. The question asks specifically which part the memory unit is considered to belong to. Options include input device, CPU, control unit and output device sections. Concept / Approach: In many school level explanations, the CPU is described as consisting of three closely related units: the arithmetic logic unit (ALU), the control unit (CU) and the memory unit. In more rigorous computer architecture, main memory is often treated as a separate subsystem connected by a bus. However, for exam purposes based on the simpler model, the memory unit is grouped with the CPU as a core internal component that works directly with processing. The input and output units are treated as external to the CPU. Therefore, the correct answer in this context is that the memory unit is part of the Central Processing Unit. Step-by-Step Solution: Step 1: Recall the typical textbook description: CPU = ALU + CU + memory unit, where all three cooperate to execute instructions. Step 2: Recognise that input devices such as keyboard and mouse feed data into the system but are not part of the CPU itself. Step 3: Similarly, output devices such as monitors and printers display results but remain outside the CPU. Step 4: The control unit is inside the CPU and coordinates operations, but the question asks where the entire memory unit belongs, not only control signals. Step 5: Conclude that, according to the simplified teaching model, the memory unit is considered part of the Central Processing Unit. Verification / Alternative check: Many introductory computer science books show a diagram in which the CPU block contains internal elements including ALU, CU and memory. Accompanying text often states that the CPU is the brain of the computer and that it includes memory for storing data and instructions temporarily while processing. While university-level computer architecture separates processor and main memory more clearly, exams based on basic computer knowledge typically follow the simplified model and expect CPU as the answer. This alignment between teaching materials and exam style supports the chosen option. Why Other Options Are Wrong: The input device section: Consists of devices like keyboard and mouse; memory does not belong to this unit. The control unit only: The control unit is a part of the CPU, but the memory unit is not a subcomponent of the control unit; both are treated as separate subunits. The output device section: Includes monitor, printer and speakers; memory is not an output device. External storage devices: Hard disks and USB drives are separate from the memory unit in basic diagrams; they are secondary storage, not the primary memory unit being discussed. Common Pitfalls: Students may recall more advanced diagrams where memory is drawn outside the CPU and then become unsure which answer is expected. It is important to recognise the level of abstraction used in basic general knowledge questions. When the syllabus describes CPU as consisting of ALU, CU and memory, you should answer according to that model. Another pitfall is confusing memory with storage; here the memory unit refers to primary memory aligned with the CPU, not external drives. Keeping these distinctions in mind helps answer similar questions accurately. Final Answer: In the simplified block diagram used in basic computer studies, the memory unit is considered a part of the Central Processing Unit (CPU).

Question 6

In computer networking, two devices are considered to be in a network if which of the following conditions is true?

Accepted Answer

Introduction / Context: Computer networks allow different devices to communicate and share resources. The key idea of networking is not just that devices exist or run programs, but that they can exchange information. This question asks you to identify the condition that defines when two devices can truly be considered to be in a network with each other. Recognising this helps you focus on communication capabilities rather than incidental similarities between machines. Given Data / Assumptions: We are dealing with two separate devices such as computers, phones or servers. Each device may run one or more processes (programs). We want to know when these devices are part of a network. Options mention running processes, matching IDs and exchange of information. Concept / Approach: In networking, the essential characteristic of a network is the ability to communicate. Two devices are said to be connected in a network if there is a path through which they can send and receive data to and from each other. It is irrelevant whether they have processes with the same process ID or even whether both devices are running processes at the same instant; what matters is the potential for one process to exchange information with another. Therefore, the correct condition is that a process on one device can exchange information with a process on the other device, using some communication medium and protocol. Step-by-Step Solution: Step 1: Focus on the core idea of networking: enabling communication and data exchange between devices. Step 2: Evaluate option A: simply having a process running on both devices does not guarantee any connection between them. Step 3: Evaluate option B: process IDs are local to each operating system and can be the same on different machines without implying a network connection. Step 4: Recognise that option C explicitly states the ability of a process on one device to exchange information with a process on another device. Step 5: Conclude that option C accurately describes the essential condition for networking between two devices. Verification / Alternative check: Definitions of a computer network typically state that a network is a collection of interconnected devices that can communicate and share resources. Protocols such as TCP/IP, HTTP and FTP are all built around the idea of processes on different hosts exchanging data packets. Nowhere do networking standards require process IDs to match. In fact, identical PIDs often appear on independent systems that are not connected at all. The ability to send and receive data using network interfaces and protocols is the deciding factor. This reinforces that option C captures the correct condition. Why Other Options Are Wrong: A process is running on both devices at the same time: Processes could run on isolated machines with no network between them; the condition is insufficient. The process IDs of running processes are the same: PIDs are assigned independently by each operating system and may coincidentally match without any network relation. All of the above conditions must be true: Incorrect because the extra conditions are neither necessary nor meaningful for networking. Both devices use the same operating system: Devices can be networked even if they use completely different operating systems, as long as they share common protocols. Common Pitfalls: Some learners focus too much on details like process IDs or operating systems and forget the fundamental purpose of networking. It is also easy to confuse running in parallel with being connected. Two devices can run similar programs at the same moment but remain completely isolated. Always return to the core networking idea: if data can be exchanged between processes on different devices, then those devices are in a network relationship. That simple test will guide you to the correct answer in many similar questions. Final Answer: Two devices are considered to be in a network if a process on one device is able to exchange information with a process on another device.

Question 7

In programming, a source program (source code) is best described as which of the following?

Accepted Answer

Introduction / Context: When software is developed, programmers usually write instructions in a high-level language such as C, Java or Python, or in assembly language. Computers, however, can only execute instructions in machine language, which is a sequence of binary codes. The term source program refers to the human readable version written by the programmer before it is translated into machine code. This question checks whether you can correctly identify what a source program is in comparison with machine language and object code. Given Data / Assumptions: The context is program development and translation. We distinguish between source code and machine code. Compilers or assemblers are used to translate one form to another. Options mix up source, machine and object code definitions. Concept / Approach: A source program is the original version of the program written by the programmer in a high-level language or assembly language. It is usually stored in text files and can be read and modified by humans. This source program is then processed by a compiler or assembler to produce an object program or machine language version that the CPU can execute. Once translated, the resulting binary is no longer called source; it is object code or executable code. Therefore, the correct definition emphasises that a source program is to be translated into machine language, not that it is already in machine language. Step-by-Step Solution: Step 1: Remember that programmers typically write code using high-level languages with keywords and symbols humans can understand. Step 2: Recognise that this human readable code is called source code or source program. Step 3: Recall that a compiler or assembler takes the source program as input and produces machine language or object code as output. Step 4: Check the options and select the one that describes a program written in a high-level or assembly language to be translated into machine language. Step 5: Reject options that describe machine code itself or object code, which are the result of translation, not the source. Verification / Alternative check: Textbooks on compilers and programming repeatedly use the term source program for the original code supplied by the programmer and object program for the translated machine code. Development tools label files with extensions such as .c, .java or .asm as source files. Documentation for compilers explicitly refers to reading source code and producing executable or object files. None of these references call the machine language version a source program. This clear and consistent terminology across programming resources confirms that the correct answer is the high-level or assembly program awaiting translation. Why Other Options Are Wrong: A program already written in machine language instructions: This is usually referred to as object code or executable code, not source program. The machine language translation (object code) of a program: Again, this is the compiled result, not the source. All of the above at the same time: A single program cannot be both source and object in the same form; each term refers to a different stage. A program that runs only inside the CPU cache: Cache is a hardware feature; it does not define whether code is source or object. Common Pitfalls: Some beginners confuse the words program and code and think there is no difference between source and machine code. Others may misread the question and pick all of the above because they associate program with any type of code. To avoid this, always remember that source is what the programmer writes and reads, while machine code is what the CPU executes. The translation step in between is the job of the compiler or assembler. Keeping this pipeline in mind makes the definition of source program easy to recall. Final Answer: A source program is a program written in a high-level or assembly language that is to be translated into machine language by a compiler or assembler.

Question 8

On a standard computer keyboard, which key is used to temporarily change letters from lower case to upper case and to access the symbol characters shown above number keys?

Accepted Answer

Introduction / Context: Typing on a computer keyboard often requires switching between lower case and upper case letters, as well as entering symbols such as !, @, # or %. Different keys have special roles in controlling how characters are entered. This question asks which key is used to temporarily change the character produced by a key, for example turning a lower case letter into an upper case one or a number into the symbol printed above it. Knowing this is basic computer literacy. Given Data / Assumptions: We are using a standard QWERTY style keyboard layout. The question refers to temporarily changing the output of keys. Letters can be switched between lower and upper case. Number keys have secondary symbols printed above them. Concept / Approach: The Shift key is a modifier key that, when held down while pressing another key, changes the character produced. For alphabetic keys, holding Shift produces an upper case letter instead of a lower case one. For number keys on the top row, holding Shift produces the symbol shown above the number, such as ! above 1 or @ above 2. The Caps Lock key also affects case, but it toggles a permanent state and does not affect numeric symbols. Ctrl, Space bar and Backspace have completely different functions. Therefore, the key described in the question is the Shift key. Step-by-Step Solution: Step 1: Recall that when you hold a special key and press a letter, you get a capital letter instead of a small letter. Step 2: Remember that the same key lets you type symbols like !, @ and # by pressing it together with the corresponding number keys. Step 3: Identify this as the behaviour of the Shift key, which acts only while it is held down. Step 4: Compare with Caps Lock, which toggles a lock for letters but does not change the behaviour of number keys to symbols in the same way. Step 5: And compare with Ctrl, Space bar and Backspace, which control commands, spacing and deletion but do not change case and symbols as described. Verification / Alternative check: If you look at your keyboard, you will see the word Shift printed on one or two keys. Experiment by typing the letter a alone (which gives a) and then holding Shift while pressing a (which gives A). Do the same with the number 1; by itself it produces 1, but with Shift it produces !. Caps Lock, on the other hand, stays on until pressed again and does not change numbers into symbols. Documentation for keyboard shortcuts also describes Shift as a modifier that changes characters or selects text. This real world behaviour confirms that Shift is the correct answer. Why Other Options Are Wrong: Ctrl key: Used in combination with other keys to issue commands (such as Ctrl+C to copy), not primarily to change letter case or numbers to symbols. Space bar: Inserts a space character and does not modify other keys' output. Backspace key: Deletes characters to the left of the cursor; it does not alter the character produced by other keys. Caps Lock key: Changes letter keys to upper case when on, but it does not provide temporary change and does not affect number keys' symbols in the same way as Shift. Common Pitfalls: Some users confuse Shift with Caps Lock because both can produce capital letters. The key difference is that Shift is temporary and also affects the symbol characters on number keys, while Caps Lock is a toggle that affects only letters. Another mistake is to think Ctrl is used for case because many important keyboard shortcuts start with Ctrl. To answer questions correctly, remember that Shift modifies the next key pressed, especially for uppercase and symbols, whereas Caps Lock toggles letter case globally. Final Answer: The key that temporarily changes letters to upper case and numbers to their symbol characters is the Shift key.

Question 9

In basic computer memory terminology, RAM (Random Access Memory) is described as ________ and ________ storage.

Accepted Answer

Introduction / Context: RAM, or Random Access Memory, is a critical component that affects the speed and responsiveness of a computer. However, its role is different from that of long term storage devices such as hard disks or solid-state drives. Understanding whether RAM is volatile or nonvolatile and whether it is temporary or permanent storage helps explain why unsaved work can be lost during a power failure. This question asks you to choose the correct pair of descriptions for RAM. Given Data / Assumptions: RAM holds data and programs while the computer is running. We are classifying it as volatile or nonvolatile. We are also classifying it as temporary or permanent storage. Options combine these adjectives in different ways. Concept / Approach: Volatile memory loses its contents when power is removed. RAM is a classic example: it retains data only while the computer is powered on. As soon as the system shuts down unexpectedly, anything not saved to disk is lost. Because of this behaviour, RAM is considered temporary working storage used during processing, not a place for permanent data. Nonvolatile memories like flash storage and hard disks keep their data without power and are therefore used for permanent storage. Therefore, the correct classification is that RAM is volatile and temporary storage. Step-by-Step Solution: Step 1: Recall what happens when a computer loses power unexpectedly: open documents and unsaved data in RAM disappear. Step 2: Recognise that this behaviour matches the definition of volatile memory, which requires constant power to maintain data. Step 3: Understand that because RAM does not keep data after shutdown, it cannot be considered permanent storage. Step 4: See that permanent storage refers to hard disks, SSDs or other nonvolatile devices that retain data. Step 5: Select the option that correctly states that RAM is volatile and temporary, matching both aspects. Verification / Alternative check: Computer hardware documentation and basic IT textbooks all describe RAM as primary memory that is volatile and used for temporary storage of currently running programs and data. System behaviour confirms this: after a reboot, RAM starts empty and must be refilled by loading the operating system and applications from permanent storage. Guides on preventing data loss emphasise saving work to disk precisely because RAM is temporary. None of these authoritative sources describe RAM as permanent or nonvolatile, so the only accurate combination is volatile and temporary. Why Other Options Are Wrong: Nonvolatile and permanent: Describes devices such as ROM, flash memory or hard disks, not RAM. Nonvolatile and temporary: Contradictory, because nonvolatile memory by definition retains data when power is off. Volatile and permanent: Also contradictory, since anything volatile cannot serve as permanent storage. Portable and external: Applies more to USB flash drives or external hard disks, not to internal RAM modules. Common Pitfalls: People often use the words memory and storage interchangeably in everyday speech, which can cause confusion on exams. A useful mental model is to think of RAM as a desk where you temporarily spread out papers while working, and permanent storage as a filing cabinet where you keep documents long term. When the office closes (power off), the desk is cleared (RAM empties), but the cabinet (disk) still holds your files. Remembering that RAM is a working area that forgets everything without power will help you correctly identify it as volatile and temporary storage. Final Answer: RAM is best described as volatile and temporary storage used while the computer is running.

Question 10

Inside a digital computer, information is stored and processed in which fundamental form?

Accepted Answer

Introduction / Context: Although computers can work with images, sound, text and video, internally they handle all this information in a standardised form. Understanding whether this internal representation is analog or digital is a key basic concept in computer science. This question asks you to identify the fundamental form in which information is stored inside a digital computer so that it can be processed reliably by electronic circuits. Given Data / Assumptions: We are dealing with modern digital computers, not purely analog machines. The question refers to how information is stored internally. Options include analog data, digital data and some nonstandard terms. We assume basic knowledge of binary representation. Concept / Approach: Digital computers represent all information using discrete symbols, most commonly binary digits or bits (0 and 1). Whether the original source is text, images, or analog sound, it is eventually converted into digital data for storage and processing. Bits are grouped into bytes and larger units to encode characters, numbers and other structures. Analog data, by contrast, varies continuously and is used in traditional audio signals or analog instruments, but not as the internal working format of digital computers. The silly terms modem data and watts data do not describe standard data representations. Therefore, the correct answer is digital data represented in binary form. Step-by-Step Solution: Step 1: Recall that digital computers are often contrasted with analog computers, highlighting their use of discrete states. Step 2: Understand that inside the computer, voltages are interpreted as either high or low, corresponding to bits 1 or 0. Step 3: Recognise that these bits are combined to form digital data, which can represent any type of information. Step 4: Compare this with analog data, which would require continuously varying signals; digital hardware in modern PCs does not store information in that form. Step 5: Choose the option that explicitly mentions digital data in binary form as the internal representation. Verification / Alternative check: Introductory computing texts state that all data in a digital computer is ultimately stored as binary patterns. Encoding schemes such as ASCII, Unicode and various image formats all rely on binary representations. Hardware descriptions of memory chips and processors refer to bits, bytes and words stored as charges or states in transistors. Analog to digital converters are used at the edges of the system to convert external analog signals into digital data, confirming that digital is the internal form. The other options lack support in standard references. Why Other Options Are Wrong: Analog data with continuously varying values: This describes real world signals like temperature or sound before conversion, not the internal representation in a digital computer. Modem data that exists only while online: Modem is a communication device; modem data is not a standard term for stored information. Watts data measured as electrical power: Watts measure power consumption, not the form in which information is stored. Sound waves stored directly without conversion: In digital systems, sound is converted to digital samples before storage; raw sound waves are analog. Common Pitfalls: Students sometimes confuse the nature of the original information with its representation inside the computer. For example, they may think that because music sounds analog, it is stored as a wave inside the machine. In reality, microphones convert sound into electrical signals, which are then sampled and quantised into digital data. Remember that digital computers always work with digital data; any analog input must be converted first. Keeping this distinction clear will help in many basic computer questions. Final Answer: Information inside a digital computer is stored and processed as digital data represented in binary form.

Question 11

Most websites have a main starting page, the ________, which acts as a doorway to the rest of the pages on that website.

Accepted Answer

Introduction / Context: When you type a website's address into a browser, you are usually taken first to a main starting page. From there, you can navigate to other sections such as About, Contact or Products. This central starting point has a special name in web terminology. The question asks you to identify that name and to recognise its role as a doorway to the rest of the site's content. Given Data / Assumptions: We are talking about typical websites with multiple pages. There is a main page associated with the base URL of the site. This page provides links or menus to other pages. Options include search engine, home page, browser and URL. Concept / Approach: The main page of a website that users see first is called the home page. It often contains branding, navigation menus and featured content. It functions as an entry point, from which visitors can access deeper pages within the site. A search engine is a separate website or service that helps you find sites, not the main page of a specific site. A browser is the software you use to view web pages, and the URL is the address you type. Therefore, the only option that correctly names the main page of a particular site is home page. Step-by-Step Solution: Step 1: Think about what happens when you visit a site like example.com; you typically see a main starting page with menus and an overview. Step 2: Recall that this starting page is commonly referred to as the home page. Step 3: Recognise that search engines such as Google or Bing are separate websites entirely, not the first page of every site. Step 4: Understand that browser is the application you use (such as Chrome or Firefox), not a part of the site itself. Step 5: Choose home page as the term that matches the description of a doorway to the rest of the website pages. Verification / Alternative check: Web design guides and tutorials consistently use the term home page for the main page of a site. Browser interfaces often include a Home button with an icon that takes you back to that page. Website sitemaps are frequently drawn as trees with the home page at the top and other pages branching out beneath it. Developers name this page index.html or a similar default file that the server serves as the home page. In contrast, search engines and browsers are separate tools, not parts of the site. These standard practices confirm that home page is the correct answer. Why Other Options Are Wrong: Search engine: A service that searches for pages across many websites; it is not the main page of a specific site. Web browser: Software used to view websites; examples include Chrome and Edge, not individual pages on a site. URL address bar: The field in the browser where you type a web address; it is a user interface element, not a website page. Login form: Some sites show a login form on the home page, but the home page itself is not always only a login page. Common Pitfalls: Some learners confuse home page with the browser's default start page, which may be a search engine. While your browser might open Google as its home page, the term in website design refers to each site's own main page. Another confusion is between URL and page; the URL is just the address, while the page is the content. Remember that the home page is the central hub of a specific website, acting as the main entry point to its other pages. Final Answer: The main doorway page of a website is called its Home page.

Question 12

If you visit a particular website frequently, what should you do in your web browser so that you do not have to type its address every time?

Accepted Answer

Introduction / Context: Modern web browsers provide several convenience features to help users return quickly to sites they visit often. Rather than memorising or retyping long web addresses, you can store shortcuts inside the browser itself. This question asks which browser feature you should use to quickly revisit a favourite site without typing its full URL each time. Recognising this feature is part of basic Internet usage skills. Given Data / Assumptions: You have a website that you visit frequently. Typing the full address every time is inconvenient. You are using a standard web browser such as Chrome, Firefox, Edge or Safari. Options include saving as a file, copying pages and bookmarking. Concept / Approach: The bookmark (or favourites) feature in browsers allows you to save a web page's address under a name you choose. Once bookmarked, you can open the site again by clicking its name in the bookmarks menu or toolbar, without retyping the URL. Saving the site as a file or copying all its pages is unnecessary and may not even work correctly for dynamic content. Printing the address or doing nothing does not solve the convenience problem. Therefore, the correct approach is to bookmark the site. Step-by-Step Solution: Step 1: Think about how you normally return to a site like your email or news portal; you likely click on a saved entry rather than typing the entire URL. Step 2: Recall that browsers have an option such as Add to bookmarks, Add to favourites or a star icon to save the current page. Step 3: Understand that this saves the URL and title, making it easy to access later from a bookmarks menu or bar. Step 4: Compare that with saving the page as a file, which downloads content but does not maintain a live link to the website. Step 5: Choose bookmark it (add it to favourites) as the option that directly addresses the need to avoid typing the address repeatedly. Verification / Alternative check: Browser help documentation and tutorials list bookmarks or favourites as essential features for managing frequently visited sites. They explain how to add, organise and use bookmarks to create quick shortcuts. Saving a site as a file is documented separately under Save page as and is intended for offline viewing, not regular access to a live site. No serious guide recommends printing URLs as a primary navigation method. These consistent recommendations demonstrate that bookmarking is the intended solution for the scenario in the question. Why Other Options Are Wrong: Save the website as a local file on your desktop: Downloads the page for offline use but will not automatically keep up with changes on the live site and is not necessary for easy access. Make a copy of all the site pages: Impractical, may violate site terms of use, and still does not function like a simple shortcut. Nothing; you must always type the address manually: Incorrect; browsers provide bookmark features specifically to avoid this. Print the website address and keep it near your computer: A manual reminder that does not integrate with the browser and still requires typing. Common Pitfalls: Some new users confuse bookmarking with saving a page file to their desktop and later double clicking it. While this can open a local copy, it is not ideal for sites that change frequently or require login. Others rely on search engines every time they want to visit, which is slower than using bookmarks. To use the web efficiently, learn to use bookmarks or favourites for sites you visit regularly. This will save time and reduce typing mistakes. Final Answer: If you go to a site often, you should bookmark it (add it to favourites) in your browser so you can open it quickly without retyping the address.

Question 13

Which of the following organisations and groups together help to coordinate and guide technical standards and policies for how the global Internet operates?

Accepted Answer

Introduction / Context: The Internet is a global network connecting millions of devices and organisations. Unlike some systems, it is not controlled by a single government or company. Instead, various technical and community based organisations collaborate to develop standards and guide the evolution of the Internet. This question asks you which of the listed bodies are involved in governing or coordinating Internet standards and policies at a high level. Given Data / Assumptions: We are dealing with global Internet coordination, not local network administration. Options list ISOC, IETF and IAB, along with an all of the above choice. We understand governance here to mean guiding technical development and standards, not political control. The question reflects typical general knowledge exam style. Concept / Approach: ISOC (Internet Society) is a professional organisation that provides overall leadership and policy guidance for the open development of the Internet. The IETF (Internet Engineering Task Force) is an open standards organisation that develops and promotes voluntary Internet standards, especially those related to TCP/IP and routing. The IAB (Internet Architecture Board) provides architectural oversight within the IETF framework and offers guidance on long term Internet design principles. Together, these groups contribute significantly to how the Internet functions and evolves. In exam style questions, they are often grouped together under the idea of governing or overseeing the Internet, so the correct answer is all of the above. Step-by-Step Solution: Step 1: Identify ISOC as the Internet Society, which focuses on Internet related standards, education and policy. Step 2: Recognise IETF as the main technical body producing Internet engineering standards such as RFCs. Step 3: Understand that IAB sits within the IETF structure to offer architectural and strategic guidance. Step 4: Note that each body plays a different but complementary role in Internet standardisation and governance. Step 5: Conclude that all of them together participate in governing or coordinating how the Internet operates, so All of the above is the best choice. Verification / Alternative check: Descriptions of Internet governance in introductory networking texts highlight the roles of ISOC, IETF and IAB. ISOC is frequently described as providing organisational home and financial support for the IETF. The IETF is recognised as the main forum where engineers develop Internet standards documented as RFCs. The IAB is documented as an oversight committee for the IETF, focusing on long term architectural issues. None of these organisations individually claims sole control; instead, they work together with other bodies such as ICANN. For the purposes of this question, which lists only these three, grouping them together as all of the above is consistent with common teaching. Why Other Options Are Wrong: ISOC alone: Important, but it does not by itself handle all the detailed engineering standards without the IETF and IAB. IETF alone: Central to technical standards, but it works under broader guidance and in coordination with ISOC and IAB. IAB alone: Provides architecture oversight but relies on the IETF to implement and ISOC to support. None; the Internet has a single world government agency: Incorrect; no single government runs the Internet, and the listed organisations do have recognised coordinating roles. Common Pitfalls: Students might mistakenly look for a single official sounding agency, similar to a government department, and overlook collaborative organisations. Others may know only the IETF and think of it as the sole standards body. In reality, Internet governance is distributed across multiple organisations. For exam purposes, when ISOC, IETF and IAB appear together as options with an all of the above choice, it is usually safe to select all of the above, remembering that Internet coordination is a shared responsibility. Final Answer: The technical standards and policies of the global Internet are coordinated by several bodies, including ISOC, IETF and IAB – so All of the above is correct.

Question 14

Which of the following devices is not primarily used as an input device for sending data or commands into a computer system?

Accepted Answer

Introduction / Context: Computer peripherals are often categorised as input devices, output devices or both. Input devices send data or control signals into the computer, while output devices present information to the user. This question asks you to identify which device in the list is not primarily used for input. Knowing the roles of common peripherals helps in understanding basic computer hardware and exam questions that test input versus output classification. Given Data / Assumptions: The options list common devices: joystick, headphones, mouse, scanner and microphone. Input devices send signals into the computer for processing. Output devices receive processed information from the computer for the user. Some devices, like touch screens, can act as both, but the question focuses on primary use. Concept / Approach: A joystick is an input device used mainly for games and simulations; moving it sends control signals into the system. A mouse is a classic pointing input device, sending position and click information to the computer. A scanner takes images or text from paper and converts them into digital data as input. A microphone sends audio signals into the computer, so it is also an input device. Headphones, by contrast, receive audio output from the computer and convert it into sound for the user. They do not send data into the computer under normal use. Therefore, headphones are not primarily an input device and are correctly classified as an output device. Step-by-Step Solution: Step 1: For each device, ask whether information mainly flows from the user to the computer (input) or from the computer to the user (output). Step 2: Joystick: user movements are translated into signals sent into the computer, so it is input. Step 3: Mouse: pointer movement and button clicks go into the computer, so it is input. Step 4: Scanner: converts physical documents into digital data, sending this into the computer, so it is input. Step 5: Headphones: receive audio signals from the computer and play them to the user; the data flow is outward, making them an output device, not input. Verification / Alternative check: Hardware classification tables in computer fundamentals books list keyboard, mouse, joystick, scanner and microphone as input devices. In the same tables, monitor, printer, speakers and headphones appear under output devices. Product descriptions for headphones emphasise listening to music, games or calls from the computer, not controlling the computer. Some headsets combine headphones with a microphone; in that case, the headphone part is output and the microphone part is input. Since the question specifically names headphones, not a headset, it clearly refers to an output only device, confirming that it is not an input device. Why Other Options Are Wrong: Joystick: Used to control games or simulations; it sends movement and button data into the computer as input. Mouse: A pointing input device used to control the graphical user interface. Scanner: Captures text or images from paper and sends them into the computer as digital data. Microphone: Captures sound waves and converts them into audio signals sent into the computer. Common Pitfalls: Some learners may confuse headphones with headsets or think of any audio device as both input and output. It is important to separate the functions: headphones only output sound, while microphones only input sound. In multi function devices, you must consider each component separately. For exam questions, focus on the primary role described; if it simply says headphones, treat it as an output device and therefore not an input device. Final Answer: The device that is not primarily used as an input device is Headphones, which are an output device.

Question 15

Which of the following devices is not purely an output device because, in modern systems, it can also be used to accept input from the user?

Accepted Answer

Introduction / Context: Traditionally, computer hardware was clearly divided into input and output devices, but many modern devices perform both roles. For example, some screens now allow users to interact directly by touching them. This question asks you to identify which device is not purely an output device because, in practice, it can also serve as an input device. Understanding this helps you handle questions about hybrid devices in basic computer knowledge exams. Given Data / Assumptions: The options list several common output devices: printer, speaker, plotter, screen and projector. The phrase not purely output suggests a device that can also accept input in some common configuration. We interpret screen as including modern touch screen monitors. The context is everyday computing with contemporary hardware. Concept / Approach: Printers, speakers, plotters and projectors are classic output devices: they take data from the computer and present it as printed pages, sound, plotted drawings or projected images. Users do not normally send information back into the computer through these devices. A screen or monitor, however, can be purely output in its traditional form, but many modern screens incorporate touch functionality. A touch screen monitor both displays output and detects touch input, acting as a combined input-output device. Therefore, among the listed options, the screen (touch screen monitor) is the one that is not purely an output device. Step-by-Step Solution: Step 1: Consider each device and ask whether users can send data back into the computer through it. Step 2: Printer: Receives data and produces printed output; it does not send user input to the computer. Step 3: Speaker: Receives audio signals and plays sound; users do not input data through the speaker itself. Step 4: Plotter: Receives drawing commands and produces line drawings on paper; it does not act as an input device. Step 5: Screen (touch screen monitor): Displays images but, when touch enabled, also senses touch points and sends that positional data back to the computer as input, making it not purely output. Verification / Alternative check: Device classification tables in modern computer fundamentals often mention touch screen as an example of a device that is both an input and an output device. It outputs visual content like any monitor but also inputs touch coordinates, allowing gestures and taps to control the system. Printers, speakers, plotters and projectors are consistently categorised as output only. Manufacturers market touch screen laptops, tablets and kiosks as having direct touch input, confirming the dual role of the screen in these systems. This real world usage supports the conclusion that a screen can be both input and output, and therefore is not purely an output device. Why Other Options Are Wrong: Printer: Designed solely to output text and graphics onto paper; it does not accept user input for processing. Speaker: Outputs sound from the computer; it does not capture or send input data to the system. Plotter: Used to create high precision drawings on paper; it is a specialised output device. Projector: Projects visual output onto a large screen; users cannot input information through the projector itself. Common Pitfalls: Some students might remember older definitions where monitor or screen is listed strictly as an output device and not consider modern touch technology. Exam setters increasingly acknowledge that touch screens exist and may phrase questions as not purely output to highlight these hybrid devices. To avoid confusion, think about the actual data flow: if a device can send information back into the computer based on user actions, then it has an input role. Touch screens clearly meet this condition, unlike the other devices listed. Final Answer: The device that is not purely an output device, because it can also accept user input, is the Screen (touch screen monitor).

Question 16

Magnetic disks (such as hard disk drives) are the most popular storage medium for which type of data access?

Accepted Answer

Introduction / Context: Different storage technologies are optimised for different patterns of accessing data. Sequential access devices are best when data is read in a fixed order, while direct access devices allow the system to jump quickly to any location. Magnetic disks, such as hard disk drives, have long been the standard storage medium for operating systems and applications. This question asks you to identify the primary type of access for which magnetic disks are most popular and suitable. Given Data / Assumptions: We are focusing on magnetic disks such as hard disk drives, not tapes. Access types include sequential and direct (random) access. We assume a typical computer system using a file system. Options propose sequential only, direct only, both or none. Concept / Approach: Magnetic disks store data in concentric tracks and sectors. A movable read/write head can be positioned over any track, and the disk rotates to bring the desired sector under the head. This design allows relatively fast access to any block of data without reading all preceding blocks, which is called direct or random access. Although files on a disk can be read sequentially, the key advantage that made magnetic disks popular compared to devices like magnetic tape is their support for direct access. Magnetic tape, by contrast, is optimised mainly for sequential access. Therefore, the best answer is that magnetic disks are most popular for direct access. Step-by-Step Solution: Step 1: Recall that direct (random) access means the system can jump to any record or block without reading earlier ones. Step 2: Understand that hard disk drives use moving heads and spinning platters, allowing the head to seek directly to a chosen track. Step 3: Recognise that this capability is what made disks suitable for fast file systems, databases and operating system storage. Step 4: Note that sequential access is also possible on disks but is not their unique advantage; magnetic tapes already served that role. Step 5: Select direct (random) access to data as the type of access for which magnetic disks are especially popular. Verification / Alternative check: Operating systems describe their file systems as providing random access to files stored on disks, allowing applications to seek to specific positions. Database systems rely on indexed access methods that assume direct access capability. Hardware classifications label hard disks as random access devices and magnetic tape as sequential access devices. While one can read blocks in order from a disk, the ability to seek quickly to any block distinguishes them from purely sequential media. These standard descriptions confirm that magnetic disks are most associated with direct access. Why Other Options Are Wrong: Sequential access only: Understates the capability of disks; they are not limited to reading data strictly in sequence. Both sequential and direct access equally: While disks can support sequential reading, exam questions usually highlight the key feature that makes them popular, which is direct access. They are not used for data access at all: False; disks are central to modern data storage and retrieval. Only offline archival storage: Magnetic tapes or optical media are more typical for offline archival; disks are used for active, online storage. Common Pitfalls: Some learners select both sequential and direct access because both are technically possible. However, exam setters typically want you to contrast disks with tapes: tapes are mainly sequential access, while disks are primarily known for direct or random access. To avoid confusion, remember that the main advantage of disks is the ability to quickly jump to any part of the data, which is the hallmark of direct access storage devices. Final Answer: Magnetic disks such as hard drives are most popular as a storage medium for direct (random) access to data.

Question 17

The Central Processing Unit (CPU) of a computer is logically divided into which two main functional parts?

Accepted Answer

Introduction / Context: The Central Processing Unit (CPU) is often described as the brain of the computer because it performs calculations and controls the execution of instructions. At a conceptual level, the CPU is divided into two major functional blocks. Knowing these parts and their roles is basic computer architecture knowledge. This question asks which components together make up the CPU in standard textbook diagrams. Given Data / Assumptions: The context is a traditional von Neumann style CPU. The question lists the arithmetic logic unit (ALU) and control unit (CU) as options. Memory is treated separately from the CPU in this classification. We are to identify which parts the CPU consists of. Concept / Approach: The Arithmetic Logic Unit (ALU) is responsible for performing arithmetic operations, such as addition and subtraction, and logical operations, such as AND, OR and comparisons. The Control Unit (CU) directs the operation of the processor, fetching instructions, decoding them and coordinating activities of the ALU, registers and memory. Together, these two units form the core of the CPU in basic models. Memory and input/output units are treated as separate components. Therefore, the CPU is commonly said to consist of the ALU and the Control Unit. Step-by-Step Solution: Step 1: Recall that the ALU performs mathematical and logical operations on data. Step 2: Recall that the Control Unit manages the flow of instructions and data, telling other parts of the system what to do and when. Step 3: Recognise that these two together cover both computation and control, the core responsibilities of the CPU. Step 4: Note that memory is usually drawn as a separate block connected to the CPU, not inside it in this model. Step 5: Select Both the ALU and the Control Unit as the correct description of the CPU's main parts. Verification / Alternative check: Most computer fundamentals textbooks define CPU as consisting of ALU and CU. Diagrams often show CPU as a box containing these two sub boxes, with buses connecting them to registers and memory. Descriptions explain that the ALU does the calculations while the CU orchestrates operations according to the program instructions. Memory is shown adjacent to but outside the CPU box. No authoritative texts claim that the CPU contains only memory or that it consists of a single unit alone. This consistent representation confirms that both ALU and CU are required to describe the CPU. Why Other Options Are Wrong: Arithmetic Logic Unit (ALU) alone: Performs computations but cannot fetch or sequence instructions without the control unit. Control Unit (CU) alone: Directs operations but cannot carry out arithmetic or logical computations without the ALU. None of the above: Incorrect because the combination of ALU and CU is standard. Only the memory unit: Memory stores data and instructions but does not perform processing; it is not the CPU by itself. Common Pitfalls: Students sometimes think of the CPU as a single chip and forget to distinguish its logical components. Another confusion is to treat memory as part of the CPU because it is located physically near the processor on the motherboard. Conceptually, however, memory is a separate unit. To answer questions correctly, remember the classic breakdown: CPU = ALU + Control Unit, with memory and I/O as separate units that work closely with the CPU. Final Answer: The CPU consists of both the Arithmetic Logic Unit (ALU) and the Control Unit (CU) as its two main functional parts.

Question 18

In the Domain Name System (DNS), human-readable website names such as \"www.example.com\" are converted into which underlying form so that data can be routed across the Internet?

Accepted Answer

Introduction / Context: People prefer to use readable names like www.example.com when visiting websites, but computers and routers on the Internet use numeric addresses to deliver data. The Domain Name System (DNS) provides a mapping between these names and the numeric addresses. This question asks you to identify what human-readable website names are converted into so that data can be routed correctly across networks. Given Data / Assumptions: The context is DNS and web addresses. Examples of domain names include strings like www.example.com. Routers and lower level protocols need numeric information to route packets. Options include binary strings, IP addresses and random nicknames. Concept / Approach: DNS is often described as the phone book of the Internet. It takes a domain name and resolves it to an IP address. An IP address is a numeric label, such as 192.0.2.1 (IPv4) or 2001:db8::1 (IPv6), that uniquely identifies a host on an IP network. Routers use IP addresses to decide where to forward packets. While IP addresses can be represented internally as binary, DNS specifically maps names to these network level addresses, not to arbitrary binary strings or random nicknames. Therefore, the correct answer is that DNS converts human readable domain names into IP addresses used for routing. Step-by-Step Solution: Step 1: Recall that when you enter a website name, your device must find the numeric address of the server before it can connect. Step 2: Understand that DNS performs this lookup and returns an IP address corresponding to the domain name. Step 3: Recognise that routers make forwarding decisions based on IP addresses, not on domain names. Step 4: Note that while IP addresses are ultimately binary inside the machine, they are commonly written in dotted decimal or colon separated hexadecimal form for human readability. Step 5: Choose the option explicitly stating that domain names are converted into an IP address used by routers to deliver packets. Verification / Alternative check: Networking textbooks explain that DNS records (such as A and AAAA records) map hostnames to IP addresses. When you use tools like nslookup or dig, you can see DNS resolving a domain name into its IP address. Packet capture tools show that after DNS resolution, a TCP or UDP connection is initiated directly to an IP address. No step in this process involves mapping to a random alphanumeric string or a purely human friendly nickname. This behaviour is confirmed across all common operating systems and directly supports the answer that DNS converts names to IP addresses. Why Other Options Are Wrong: A binary string that humans can easily memorise: While IP addresses are represented in binary internally, DNS is defined specifically in terms of mapping to IP addresses, not generic binary strings for memorisation. A random alphanumeric nickname for the site: Domain names themselves are the human readable nicknames; DNS resolves them to numeric IP addresses, not to other nicknames. A hexadecimal string unrelated to networking: Hexadecimal may be used to represent IPv6 addresses, but the key concept is the IP address, not an unrelated hex string. Only a graphical logo for the website: Logos are part of website design and have nothing to do with DNS or routing. Common Pitfalls: Some learners reverse the mapping and think that DNS converts IP addresses into domain names. While reverse lookups do exist, the standard and more common operation is converting domain names into IP addresses. Others may think of binary or hexadecimal representations and lose sight of the fact that the essential concept is the IP address. To answer questions like this correctly, remember that DNS is the system that turns user friendly domain names into the IP addresses that the network actually uses. Final Answer: In DNS, human readable domain names are converted into an IP address used by routers to deliver packets across the Internet.

Question 19

In computer security, the process of verifying that a user's login name and password are correct before granting access to a system is called ________.

Accepted Answer

Introduction / Context: Most computer systems require users to identify themselves with a username and prove their identity with a password or other credentials. Before allowing access to protected resources, the system must check these credentials. This process has a specific name in computer security and networking. The question asks you to recall that term, which is fundamental to understanding login procedures and secure access control. Given Data / Assumptions: A user provides a login name (username) and password. The system compares these credentials with stored information. Access is granted only if the credentials match. Options include troubleshooting, logging in, configuration and authentication. Concept / Approach: The process of checking a user's credentials to ensure they are who they claim to be is called authentication. It answers the question: Are you really this user? After successful authentication, authorisation determines what the user is allowed to do. Logging in is the overall action from the user's point of view and includes both entering credentials and being granted access, but the technical term for the verification step is authentication. Troubleshooting refers to diagnosing problems, and configuration refers to setting up system options. Therefore, authentication is the correct term for verifying a username and password pair. Step-by-Step Solution: Step 1: Recognise that the scenario involves checking a login name and password for correctness. Step 2: Recall that authentication is defined as the process of verifying the identity of a user or system. Step 3: Distinguish this from authorisation, which is the process of deciding what an authenticated user is allowed to do. Step 4: Note that the term logging in describes the overall act but not specifically the verification mechanism. Step 5: Choose authentication as the precise security term for verifying credentials. Verification / Alternative check: Security tutorials and standards documents define authentication as the process of verifying an identity, typically by checking something the user knows (a password), has (a token) or is (biometrics). Login prompts are often referred to as authentication prompts. Error messages indicate authentication failed when a user enters incorrect credentials. In contrast, troubleshooting guides discuss how to fix system problems and configuration guides explain how to set up software options. None of these overlap with the specific meaning of authentication. This consistent use across security literature confirms that authentication is the correct term. Why Other Options Are Wrong: Troubleshooting: Refers to finding and resolving faults; it is not about identity verification. Logging in: Describes the entire user action of entering credentials and gaining access, but the technical check is authentication. Configuration: Involves setting parameters and options in a system, not checking user identities. Encryption: Refers to converting data into a coded form to protect confidentiality; it may be used with authentication but is a different concept. Common Pitfalls: Some learners confuse logging in with authentication, because in everyday language they seem similar. However, in security terminology, authentication is the specific process of verifying credentials, while logging in is a broader term for starting a session. Another common confusion is between authentication and authorisation. Remember the simple distinction: authentication answers Who are you?, while authorisation answers What are you allowed to do?. Keeping these terms straight will help in many exam questions and real world security discussions. Final Answer: The verification of a login name and password before granting access is known as Authentication.

Question 20

On the Internet, every computer that can be reached over the network is commonly known as a ________.

Accepted Answer

Introduction / Context: The Internet connects many types of devices: personal computers, servers, routers, phones and more. In networking terminology, any device that has an IP address and can participate directly in network communication is given a generic name. This question asks you to recall that general term for a computer on the Internet, regardless of whether it is acting as a client or a server in a particular communication. Given Data / Assumptions: We are talking about computers connected to the Internet. Each such computer has an IP address and can send or receive data. The role may be client, server or both, depending on the application. Options include client, modem, server, host and router. Concept / Approach: In IP networking, any device that has an IP address and can send and receive packets is called a host. The term is neutral with respect to the device's specific role. When a host initiates a request, we informally call it a client; when it responds to requests or offers services, we call it a server. A single machine can act as both client and server at different times. A modem is a communication device that connects a local network or single computer to an Internet service provider; it is not itself the generic name for every Internet connected computer. Therefore, the correct term for every computer on the Internet is host. Step-by-Step Solution: Step 1: Recall that IP addresses are assigned to end systems such as PCs, servers and some network devices, collectively known as hosts. Step 2: Understand that the client server model describes roles in a specific interaction, not permanent labels for machines. Step 3: Recognise that a modem or router is a specific network device that may connect hosts but is not the generic name for all of them. Step 4: Check the options and identify host as the standard networking term for any device with an IP address that participates in communication. Step 5: Select host as the correct answer, keeping in mind that clients and servers are special cases of hosts. Verification / Alternative check: Networking textbooks and RFC documents frequently use the word host when referring to endpoints in an IP network. For example, they speak of host A sending packets to host B. Diagrams label end computers as hosts while routers are drawn separately as intermediate devices. Client and server roles are usually described in the context of specific application protocols such as HTTP or FTP. ISP documentation describes modems and routers as equipment connecting hosts to the Internet, not as hosts themselves in most contexts. All of this reinforces the idea that host is the generic term for every Internet connected computer. Why Other Options Are Wrong: Client: Refers to a host that requests services in a particular client server interaction, not to every Internet computer generically. Modem: A device that modulates and demodulates signals to connect one or more hosts to an ISP; it is not the name for all Internet computers. Server: Refers to a host that provides services; many Internet computers act only as clients. Router only: Routers are special network devices that forward packets; many Internet hosts are not routers. Common Pitfalls: Some learners think of client or server as the default term for any Internet computer because they hear these words often in web contexts. However, these are role specific terms. Another confusion is to focus on the modem or Wi-Fi router in a home network and assume it is the main Internet device; while important, it is not the generic name for all connected machines. To answer questions correctly, remember that the neutral term for any device with an IP address participating on the network is host. Final Answer: Every computer on the Internet is commonly known as a Host.

Computer Questions