Operating System MCQ with Answers Set 4

Operating System MCQ with answers set 4 contains 25 most important OS multiple choice questions with answers. These MCQs are helpful to prepare computer science related jobs tests. If you are preparing #UGC NET computer science GATE exam then must read it. This OS MCQ set contains MCQs related to process, OS deadlocks, different types of operating system, basic OS terms, scheduling algorithms, OS interrupts and more.

Operating System MCQs Set 4

1. To access the services of operating system, the interface is provided by the _____?

A). API
B). System calls
C). Library
D). Assembly instructions

2. Which conditions must be satisfied to solve a critical section problem?

A). Progress
B). Mutual Exclusion
C). Bounded Waiting
D). All of these

3. Which one of the following error will be handle by the operating system?

A). Power failure
B). Connection failure in the network
C). Lack of paper in printer
D). All of the above

4. Which of the following operating system runs on the server?

A). Network OS
B). Real-time OS
C). Batch OS
D). Distributed OS

5. What is the main function of the command interpreter?

A). To provide the interface between the API and application program
B). To get and execute the next user-specified command
C). To handle the files in operating system
D). None of these

6. The page replacement policy that sometimes leads to more page faults when the size of the memory is increased is _____?

A). FIFO
B). LRU
C). No such policy exists
D). None of the above

7. The only slate transition that is initiated by the user process itself is _____?

A). Dispatch
B). Wakeup
C). Block
D). None of these

8. Which one of the following is not a real time operating system?

A). RTLinux
B). Palm OS
C). QNX
D). VxWorks

9. Fragmentation is _____?

A). Dividing the secondary memory into equal sized fragments
B). Fragments of memory words used in a page
C). Fragments of memory words unused in a page
D). Dividing the main memory into equal-sized fragments

10. The OS X has _____?

A). Hybrid kernel
B). Microkernel
C). Monolithic kernel
D). Monolithic kernel with modules

11. Which of the following arc realtime systems?

A). An online railway reservation system
B). Aircraft control system
C). Payroll processing system
D). A process control system

12. What type of memory stores data in a swap file on a hard drive?

A). RAM
B). ROM
C). Secondary memory
D). Virtual memory

13. The systems which allow only one process execution at a time, are called _____?

A). Uniprocessing system
B). Uniprogramming system
C). Unitasking system
D). All of the above

14. Context switching is part of _____?

A). Interrupt handling
B). Spooling
C). Poolling
D). Interrupt servicing

15. Which method is the best among file allocation methods?

A). Linked
B). Contiguous
C). Indexed
D). None of the these

16. In Unix, Which system call creates the new process?

A). Create
B). Fork
C). New
D). PS

17. Scheduling is _____?

A). Quite simple to implement, even on large mainframes
B). Allowing job to use the processor
C). The same regardless of the purpose of the system
D). Unrelated to performance considerations

18. A process can be terminated due to _____?

A). Fatal error
B). Killed by another process
C). Normal exit
D). All of the Above

19. In paged memory systems, if the page size is increased, then the internal fragmentation generally _____?

A). Remains constant
B). Becomes less
C). Becomes more
D). None of the above

20. Which of the following operating system write through catches?

A). DOS
B). ULTRIX
C). UNIX
D). XEVIX

21. An operating system contains 3 user processes each requiring 2 units of resource R. The minimum number of units of R such that no deadlock will ever occur is _____?

A). 3
B). 6
C). 5
D). 4

22. What is interprocess communication?

A). Communication within the process
B). Communication between two process
C). Communication between two threads of same process
D). None of these

23. Cryptography in operating system is used for _____?

A). Information Protection
B). File management
C). Job scheduling
D). Spooling

24. A set of processes is deadlock if _____?

A). Each process is terminated
B). All processes are trying to kill each other
C). Each process is blocked and will remain so forever
D). None of the mentioned

25. Trap is a _____?

A). Asynchronous interrupt
B). Synchronous interrupt
C). Hardware interrupt
D). Operating system interrupt

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