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Operating System Mcq [SET - 16] | Operating System Mcq Sanfoundry

 

operating system mcq sanfoundry


1. Which computing is less restrictive?

    Soft real-time
    Real-time
    Distributed

ANSWER= (A) Soft real-time

 

2. Which of the following is the allocation method of a disk space?

    Contiguous allocation
    Linked allocation
    Indexed allocation

ANSWER= (A) All of the Above

 

3. What does USB stand for?

    universal signal board
    universal signal bus
    universal serial bus

ANSWER= (C) universal serial bus

 

4. Which of the following concept is best to preventing page faults?

    Paging
    The working set
    Hit ratios

ANSWER= (B) The working set

 

5. A device similar to a flash drive

    memory card
    compact drive
    compact disk

ANSWER= (A) memory card

 

6. In what mode can only one program be executed at one time?

     Virtual Real
     Compatibility
      Real

ANSWER= (A) Real

 

7. Poor response time are usually caused by

    Process busy
    High I/O rates
    High paging rate

ANSWER= (D) Any of the above

 

8.  Which of the following algorithm is one of the brute-force algorithms?

    Priority Scheduling
    Shortest-Job-First Scheduling
    First-Come-First-Served Scheduling

ANSWER= (C) First-Come-First-Served Scheduling

 

9. The desktop operating system is also called a .............

    Single user operating system
    Client operating system
    Multi user operating system

ANSWER= (B) Client operating system

 

10.  PCB stands for:

    Process Control Block
    Program Control Block
    Proceeding Control Block

ANSWER= (A) Process Control Block

 

11. What is the maximum size of a word document created?

      1 MB
    16MB
      32 MB

ANSWER= (A) 32 MB

 

12. Virtual memory typically located on

    RAM
    CPU
    Flash card

ANSWER= (D) Hard drive

 

13.  Context switching is

    Part of spooling

    Part of handling

ANSWER= (C) Part of handling

 

14. An example of an operating system that does not have a well-defined structure:

    Windows 98
    Linux
    MS-Office

ANSWER= (D) MS-DOS

 

15. What is contained in the page table?

    Base address of each frame and corresponding page number
    Memory address and corresponding page number
    File name and corresponding page number

ANSWER= (A) Base address of each frame and corresponding page number

 

16. The child process completes execution, but the parent keeps executing, then the child process is known as                      

    orphan
     zombie
     body

ANSWER= (B)  zombie

 

17. Tree structure displays the

    File only
    Directory only
    File and directory name

ANSWER= (A) File and directory name

 

18. What is Inter process communication?

    allows processes to communicate and synchronize their actions when using the same address space
    allows processes to communicate and synchronize their actions without using the same address space
    allows the processes to only synchronize their actions without communication

ANSWER= (B) allows processes to communicate and synchronize their actions without using the same address space

 

19. What do you mean by Memory Compaction?

    Combine multiple equal memory holes into one big hole
    Combine multiple small memory holes into one big hole
    Divide big memory hole into small holes

ANSWER= (B) Combine multiple small memory holes into one big hole

 

20. An algorithm is best described as

    A computer language
     A step by step procedure for solving a problem
    A branch of mathematics

ANSWER= (B) A step by step procedure for solving a problem

 

21. Copying a process from memory to disk to allow space for other processes is Called

    Swapping
    Deadlock
    Demand Paging

ANSWER= (A) Swapping

 

22. In indirect communication between

     there is another process r to handle and pass on the messages between p and q
     there is another machine between the two processes to help communication
    there is a mailbox to help communication between p and q

ANSWER= (A) there is a mailbox to help communication between p and q

 

23. Page stealing

    Is a sign of an efficient system
    Is taking page frame from other working sets
    Should be the turning goal

ANSWER= (B) Is taking page frame from other working sets

 

24. In the non blocking send                      

    the sending process keeps sending until the message is received
    the sending process sends the message and resumes operation
    the sending process keeps sending until it receives a message

ANSWER= (B)  the sending process sends the message and resumes operation

 

25. A spooler is a

    Location in memory that maintains the contents of documents until it prints out
    Queue of print job that are waiting to print
    Program that coordinates the print job that are waiting to process

ANSWER= (A) Program that coordinates the print job that are waiting to process


 

26. Concurrent access to shared data may result in

    data consistency
    data insecurity
    data inconsistency

ANSWER= (C) data inconsistency

 

27. Message passing system allows processes to                 


    communicate with one another without resorting to shared data
    communicate with one another by resorting to shared data
    share data

ANSWER= (A) communicate with one another without resorting to shared data

 

28.  Which of the following are TRUE for direct communication?

     a communication link can be associated with n number of process(n = max. number of processes supported by system)
    a communication link can be associated with exactly two processes
    exactly n/2 links exist between each pair of processes(n = max. number of processes supported by system)

ANSWER= (B) a communication link can be associated with exactly two processes

 

29. The child process can                      

    be a duplicate of the parent process
    never be a duplicate of the parent process
    cannot have another program loaded into it

ANSWER= (A)  be a duplicate of the parent process

 

30. In which addressing mode the contents of a register specified in the instruction is first decremented, and then these contents are used as the effective address of the operands

    Index addressing
    Indirect addressing
    Auto addressing

ANSWER= (A) Auto decrement




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