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- Question
What is CPU Scheduler?
- Correct Answer
- Selects from among the processes in memory that are ready to execute, and allocates the CPU to one of them CPU scheduling decisions may take place when a process: 1Switches from running to waiting state 2Switches from running to ready state 3Switches from waiting to ready 4Terminates Scheduling under 1 and 4 is non-preemptive All other scheduling is preemptive
- 1. What are the operating system components? Discuss
- 2. What is an operating system? Discuss
- 3. Is Windows NT a full blown object oriented operating system? Give reasons. Discuss
- 4. By default, a Linux user falls under which group?
Options- A. same as userid (UPG)
- B. system
- C. staff
- D. others Discuss
- 5. What happens during the bootstrap process? Discuss
- 6. What is cycle stealing? Discuss
- 7. Explain fork() system call? Discuss
- 8. How can you get/set an environment variable from a program? Discuss
- 9. A Map is an Array,which contains the addresses of the free space in swap device that are allocatable resources,and the number of the resource unit available there.
Options- A. TRUE
- B. FALSE Discuss
- 10. Which memory management technique involves dividing the memory into fixed sized blocks ?
Options- A. Paging
- B. Scaling
- C. Whiping
- D. Tracking Discuss
Operating Systems problems
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Correct Answer: - Process management - Main memory management - File management - I/O system management - Secondary storage management - Networking - Protection system - Command interpreter system
Correct Answer: An operating system is a program that acts as an intermediary between the user and the computer hardware The purpose of an OS is to provide a convenient environment in which user can execute programs in a convenient and efficient manner It is a resource allocator responsible for allocating system resources and a control program which controls the operation of the computer hardware
Correct Answer: No Windows NT is not so, because its not implemented in object oriented language and the data structures reside within one executive component and are not represented as objects and it does not support object oriented capabilities
Correct Answer: same as userid (UPG)
Explanation:
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel. By default, a Linux user falls under same as userid (UPG) group.
Correct Answer: A bootstrap is the process of starting up a computer It also refers to the program that initializes the operating system (OS) during start-up It referred to a bootstrap load button that was used to initiate a hardwired bootstrap program, or smaller program that executed a larger program such as the OS
Correct Answer: We encounter cycle stealing in the context of Direct Memory Access (DMA) Either the DMA controller can use the data bus when the CPU does not need it, or it may force the CPU to temporarily suspend operation The latter technique is called cycle stealing Note that cycle stealing can be done only at specific break points in an instruction cycle
Correct Answer: The `fork()? used to create a new process from an existing process The new process is called the child process, and the existing process is called the parent We can tell which is which by checking the return value from `fork()? The parent gets the child?s pid returned to him, but the child gets 0 returned to him
Correct Answer: Getting the value of an environment variable is done by using `getenv()? Setting the value of an environment variable is done by using `putenv()?
Correct Answer: TRUE
Explanation:
The given statement is clearly true.
Correct Answer: Paging
Explanation:
Paging is a memory management technique in which process address space is broken into blocks of the same size called pages.
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