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

 

1. Which computing is less restrictive?

A) Soft real-time
B) Real-time
C) Distributed
D)  Hard real-time

ANSWER= (A) Soft real-time

 

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

A) Contiguous allocation
B) Linked allocation
C) Indexed allocation
D) All of the Above

ANSWER= (A) All of the Above

 

3. What does USB stand for?

A) universal signal board
B) universal signal bus
C) universal serial bus
D) universal serial board

ANSWER= (C) universal serial bus

 

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

A) Paging
B) The working set
C) Hit ratios
D) Address location resolution

ANSWER= (B) The working set

 

5. A device similar to a flash drive

A) memory card
B) compact drive
C) compact disk
D) memory disk

ANSWER= (A) memory card

 

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

A)  Virtual Real
B)  Compatibility
C)   Real
D)  Protected

ANSWER= (A) Real

 

7. Poor response time are usually caused by

A) Process busy
B) High I/O rates
C) High paging rate
D) Any of the above

ANSWER= (D) Any of the above

 

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

A) Priority Scheduling
B) Shortest-Job-First Scheduling
C) First-Come-First-Served Scheduling
D) Round-Robin Scheduling

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

 

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

A) Single user operating system
B) Client operating system
C) Multi user operating system
D) Embedded operating system

ANSWER= (B) Client operating system

 

10.  PCB stands for:

A) Process Control Block
B) Program Control Block
C) Proceeding Control Block
D) Process Communication Block

ANSWER= (A) Process Control Block

 

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

A)   1 MB
B) 16MB
C)   32 MB
D)  999KB

ANSWER= (A) 32 MB

 

12. Virtual memory typically located on

A) RAM
B) CPU
C) Flash card
D) Hard drive

ANSWER= (D) Hard drive

 

13.  Context switching is

A) Part of spooling
B) Part of pollingns
C) Part of handling
D) Part of interrupt servicing

ANSWER= (C) Part of handling

 

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

A) Windows 98
B) Linux
C) MS-Office
D) MS-DOS

ANSWER= (D) MS-DOS

 

15. What is contained in the page table?

A) Base address of each frame and corresponding page number
B) Memory address and corresponding page number
C) File name and corresponding page number
D) None of Above

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                      

A) orphan
B)  zombie
C)  body
D) dead

ANSWER= (B)  zombie

 

17. Tree structure displays the

A) File only
B) Directory only
C) File and directory name
D) None of above

ANSWER= (A) File and directory name

 

18. What is Inter process communication?

A) allows processes to communicate and synchronize their actions when using the same address space
B) allows processes to communicate and synchronize their actions without using the same address space
C) allows the processes to only synchronize their actions without communication
D) none of the mentioned

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

 

19. What do you mean by Memory Compaction?

A) Combine multiple equal memory holes into one big hole
B) Combine multiple small memory holes into one big hole
C) Divide big memory hole into small holes
D) Divide memory hole by 2

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

 

20. An algorithm is best described as

A) A computer language
B)  A step by step procedure for solving a problem
C) A branch of mathematics
D) All the above

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

A) Swapping
B) Deadlock
C) Demand Paging
D) Page Fault

ANSWER= (A) Swapping

 

22. In indirect communication between

A)  there is another process r to handle and pass on the messages between p and q
B)  there is another machine between the two processes to help communication
C) there is a mailbox to help communication between p and q
D) none of the mentioned

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

 

23. Page stealing

A) Is a sign of an efficient system
B) Is taking page frame from other working sets
C) Should be the turning goal
D) Is taking layer disk space for page in page out

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

 

24. In the non blocking send                      

A) the sending process keeps sending until the message is received
B) the sending process sends the message and resumes operation
C) the sending process keeps sending until it receives a message
D) none of the mentioned

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

 

25. A spooler is a

A) Location in memory that maintains the contents of documents until it prints out
B) Queue of print job that are waiting to print
C) Program that coordinates the print job that are waiting to process
D) Message sent from the printer to the operating system when a print job is completed

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

 

26. Concurrent access to shared data may result in

A) data consistency
B) data insecurity
C) data inconsistency
D) none of the mentioned

ANSWER= (C) data inconsistency

 

27. Message passing system allows processes to                 

A) communicate with one another without resorting to shared data
B) communicate with one another by resorting to shared data
C) share data
D)  name the recipient or sender of the message

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

 

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

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

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

 

29. The child process can                      

A) be a duplicate of the parent process
B) never be a duplicate of the parent process
C) cannot have another program loaded into it
D)  never 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

A) Index addressing
B) Indirect addressing
C) Auto addressing
D) Auto decrement

ANSWER= (A) Auto decrement

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