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Operating System Mcq [SET - 5] | Operating System Mcq Online Test

 

operating system mcq online test



1.  If a process needs I/O to or from a disk, and if the drive or controller is busy then

    the request will be placed in the queue of pending requests for that drive
    the request will not be processed and will be ignored completely
    the request will be not be placed

ANSWER= (A) the request will be placed in the queue of pending requests for that drive

 

2. If multiple threads are concurrently searching through a database and one thread returns the result then the remaining threads must be                          

    continued
     cancelled
    protected

ANSWER= (B) cancelled

 

3. Signals that occur at the same time, are presented to the process                          

    one at a time, in a particular order
    one at a time, in no particular order
     all at a time

ANSWER= (B) one at a time, in no particular order

 

4. Which of the following is not TRUE?

    processes may send each other signals
    kernel may send signals internally
    a field is updated in the signal table when the signal is sent

ANSWER= (C)  a field is updated in the signal table when the signal is sent

 

5. The usual effect of abnormal termination of a program is                          

    core dump file generation
    system crash
    program switch

ANSWER= (A) core dump file generation

 

6. .................... provides the interface to access the services of the operating system.

    API
     Library
     System call

ANSWER= (C) System call

 

7. Which of the following was the first widely used multiuser, multitasking OS?

    Unix
    MS-DOS
    Windows 3.0

ANSWER= (A) Unix

 

8. A process can never be sure that a signal it has sent                            

    has which identifier
     has not been lost
    has been sent

ANSWER= (B)  has not been lost

 

9. Instead of starting a new thread for every task to execute concurrently, the task can be passed to a                        

    process
    thread pool
    thread queue

ANSWER= (B) thread pool

 

10. Each connection arriving at multi threaded servers via network is generally

    is directly put into the blocking queue
    is wrapped as a task and passed on to a thread pool
    is kept in a normal queue and then sent to the blocking queue from where it is dequeued

ANSWER= (B) is wrapped as a task and passed on to a thread pool

 

11. Disk Operating System (DOS) is an example of ___.

    PC OS
     Multi-processor OS
    Distributed OS

ANSWER= (A) PC OS

 

12.  ___ algorithm is used where resources have multiple instances.

    Resource Allocation Graph
    Banker’s
     Resource Request

ANSWER= (B) Banker’s

 

13. MAR stands for ___.

    Memory Address Register
    Memory Allocation Register
    Main Address Register

ANSWER= (A) Memory Address Register

 

14. Segments of user programs are allocated memory by the ___.

    FCFC Scheduler
    FIFO Scheduler
    Bob Scheduler

ANSWER= (C) Bob Scheduler

 

15. Which of the following is not an operating system?

     UNIX
    MS-DOS
    CP/M

ANSWER= (D) PASCAL

 

16. In a time-sharing operating system, when the time slot given to a process is completed, the process goes from the running state to the :

    Blocked state
    Ready state
    Suspended state

ANSWER= (B) Ready state


 

17. Which one of the following is a synchronization tool?

    thread
    pipe
    semaphore

ANSWER= (C)  semaphore

 

18. Computer system is divided into how many numbers of components?




ANSWER= (A) 4

 

19. Process synchronization can be done on

    hardware level
    software level
    both (a) and (b)

ANSWER= (C) both (a) and (b)

 

20. Which one of the following is the deadlock avoidance algorithm?

    banker’s algorithm
    round-robin algorithm
    elevator algorithm

ANSWER= (A) banker’s algorithm

 

21. For effective operating system, when to check for deadlock?

    every time a resource request is made
    at fixed time intervals
    both (a) and (b)

ANSWER= (C) both (a) and (b)

 

22. Which of the following is an example of a spooled device?

     A graphic display device
    A line printer used to print the output of a number of jobs
     A secondary storage device in a virtual memory system

ANSWER= (B) A line printer used to print the output of a number of jobs

 

23. Operating system is resident in memory of which part?

    Middle
    Lower
    Upper

ANSWER= (C) Upper

 

24. Operating System maintains the page table for

    each process
    each thread
    each instruction

ANSWER= (A) each process

 

25. Because of virtual memory, the memory can be shared among

    processes
    threads
    instructions

ANSWER= (A) processes

 

26. _____ is the concept in which a process is copied into main memory from the secondary memory according to the requirement.

    Paging
    Demand paging
    Segmentation

ANSWER= (B) Demand paging

 

27. The pager concerns with the

    individual page of a process
    entire process
    entire thread

ANSWER= (A) individual page of a process

 

28. Swap space exists in

    primary memory
    secondary memory
    CPU

ANSWER= (B)  secondary memory

 

29. A memory buffer used to accommodate a speed differential is called

    stack pointer
    cache
    accumulator

ANSWER= (B) cache

 

30. The Operating System should work in a network as well as ___ environment.

    diverted
    data
    distributed

ANSWER= (C) Distributed




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