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Operating System Mcq [SET - 15] | Operating System Mcq Online Test

 

operating system mcq online test

1. Remote computing services involve the use of timesharing and

    Multi processing
    Interactive processing
    Batch processing

ANSWER= (C) Batch processing

 

2. Operating System of PC consists of two parts

    BIOS and RAM
    OS and RAM
    ROM and DOS

ANSWER= (D)  BIOS and DOS

 

3. What is a long-term scheduler?

    it selects processes which have to be brought into the ready queue
    it selects processes which have to be executed next and allocates cpu
    it selects processes which heave to remove from memory by swapping

ANSWER= (A)  it selects processes which have to be brought into the ready queue

 

4. SPOOL Stands for

    Simultaneous Peripheral Operation on Line
    Simple Peripheral Operation on Line
    Single Process Operation on Line

ANSWER= (A) Simultaneous Peripheral Operation on Line

 

5. If all processes I/O bound, the ready queue will almost always be ................. and the Short term Scheduler will have a to do.

    full, little
    full, lot
    empty, little

ANSWER= (C) empty, little

 

6. CPU switching from one process to another requires saving the state of the current process and loading the latest state of the next process. This is known as:

    Program Switch
    Context Switch
    Process Switch

ANSWER= (B) Context Switch

 

7. What hole will allocates in “Worst-Fit” algorithm of memory management?

    It allocates the smaller hole than required memory hole
    It allocates the smallest hole from the available memory holes
    It allocates the largest hole from the available memory holes

ANSWER= (C)  It allocates the largest hole from the available memory holes

 

8. What is a medium-term scheduler?

    it selects which process has to be brought into the ready queue
    it selects which process has to be executed next and allocates cpu
    it selects which process to remove from memory by swapping

ANSWER= (C)  it selects which process to remove from memory by swapping

 

9. What is a short-term scheduler?                      

    it selects which process has to be brought into the ready queue
    it selects which process has to be executed next and allocates cpu
    it selects which process to remove from memory by swapping

ANSWER= (B) it selects which process has to be executed next and allocates cpu

 

10.The primary distinction between the short term scheduler and the long term scheduler is

    the length of their queues
    the type of processes they schedule
    the frequency of their execution

ANSWER= (C)  the frequency of their execution

 

11. Which one is the default word processor for Microsoft Windows?

    MS Word
    WordPad
    Ms Paint

ANSWER= (B) WordPad

 

12. In a multiprogramming environment

     the processor executes more than one process at a time
    the programs are developed by more than one person
    more than one process resides in the memory

ANSWER= (C) more than one process resides in the memory

 

13. The context of a process in the PCB of a process does not contain                      

    the value of the cpu registers
    the process state
    memory-management information

ANSWER= (D)  context switch time

 

14. Computer Software can be categorized as

    Application Software
    System Software
    Both of the above

ANSWER= (B) System Software

 

15. Which of the following need not necessarily be saved on a context switch between processes?

    general purpose registers
    translation lookaside buffer
    program counter

ANSWER= (B)  translation lookaside buffer

 

16. Winchester disks are a type of                

     optical disks
    magnetic disks
    compact disks

ANSWER= (B) magnetic disks

 

17. HLDA stands for                

    high level data
    high level data acknowledgment
    hold acknowledgement

ANSWER= (C)  hold acknowledgement

 

18. Mutual exclusion can be provided by the

    mutex locks
     binary semaphores
    both mutex locks and binary semaphores

ANSWER= (C) both mutex locks and binary semaphores

 

19. When high priority task is indirectly preempted by medium priority task effectively inverting the relative priority of the two tasks, the scenario is called

    priority inversion
    priority removal
    priority exchange

ANSWER= (A) priority inversion

 

20. Word length of a personal computer

     64bits
    16 bits
    8 bits

ANSWER= (C) 8 bits

 

21. A swapper manipulates..................whereas the pager is concerned with individual   of a process.

     the entire process, parts
    all the pages of a process, segments
    the entire process, pages

ANSWER= (A)  the entire process, pages

 

22. Process synchronization can be done on

     hardware level
    software level
    both hardware and software level

ANSWER= (C) both hardware and software level

 

23. The ability to execute a program that is only partially in memory has benefits like

    the amount of physical memory cannot put a constraint on the program
    programs for an extremely large virtual space can be created
    throughput increases

ANSWER= (D) all of the mentioned

 

24. A semaphore is a shared integer variable

    that can not drop below zero
    that can not be more than zero
    that can not drop below one

ANSWER= (A) that can not drop below zero

 

25. Virtual Memory is

    Extremely Large Main memory
    Extremely Large Secondary memory
    An illusion of extremely large main memory

ANSWER= (C) An illusion of extremely large main memory

 

26. RPC stands for:

    Remote Procedure Communication
    Remote Process Call
    Remote Procedure Call

ANSWER= (C) Remote Procedure Call

 

27. A plug and play storage device that simply plugs in the port of a computer is                      

    flash drive
    compact disk
     hard disk

ANSWER= (A)  flash drive

 

28. Number of processes completed per time unit is:

     CPU utilization
    Throughput
    Waiting time

ANSWER= (B) Throughput

 

29. Symptoms of swap-file problems include extremely slow system speed and a disk that is constantly being accessed, which is referred to as ______________.

    Clocking
    Thrashing
    Booting

ANSWER= (B) Thrashing

 

30. Which one is a 'text editor' for microsoft windows?

     MS Word
     Ms Excel
    WordPad

ANSWER= (D) Notepad



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