When designing the file structure for an operating system, what attributes are considered ?

Correct Answer: When a thread is created the threads does not require any new resources to execute the thread shares the resources like memory of the process to which they belong to The benefit of code sharing is that it allows an application to have several different threads of activity all within the same address space Whereas if a new process creation is very heavyweight because it always requires new address space to be created and even if they share the memory then the inter process communication is expensive when compared to the communication between the threads

Correct Answer: C2 level security provides for: 1Discretionary Access Control 2Identification and Authentication 3Auditing 4Resource reuse

Correct Answer: Time taken for switching from one process to other is pure over head Because the system does no useful work while switching So one of the solutions is to go for threading when ever possible

Correct Answer: Page swapping or page replacements are called page cannibalizing

Correct Answer: - Normal completion - Time limit exceeded - Memory unavailable - Bounds violation - Protection error - Arithmetic error - Time overrun - I/O failure - Invalid instruction - Privileged instruction - Data misuse - Operator or OS intervention - Parent termination

Correct Answer: Graphical

Correct Answer: In message passing, it is the condition in which, both, the sender and receiver are blocked until the message is delivered

Correct Answer: User data: Modifiable part of user space May include program data, user stack area, and programs that may be modified User program: The instructions to be executed System Stack: Each process has one or more LIFO stacks associated with it Used to store parameters and calling addresses for procedure and system calls Process control Block (PCB): Info needed by the OS to control processes

Correct Answer: Seek time is the time required to move the disk arm to the required track Rotational delay or latency is the time it takes for the beginning of the required sector to reach the head Sum of seek time (if any) and latency is the access time Time taken to actually transfer a span of data is transfer time

Correct Answer: A binary semaphore is one, which takes only 0 and 1 as values They are used to implement mutual exclusion and synchronize concurrent processes