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Download in pdf on Operating System multiple choice questions(MCQs) and answers. These quiz objective questions are important for graduate, under-graduate & competitive examinations NIELIT, BCA, B.Sc. MCA, M.Sc(IT), BE, B.Tech, CCNA, MCSE etc.
(31)
Which of the following is an example of a SPOOLED device?
[A]
The secondary memory device in a virtual memory system.
[B]
A line printer used to print the output of a number of jobs.
[C]
The terminal used to enter the input data for a program being executed.
[D]
None of the above
Comment
(32)
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
Comment
(33)
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
Comment
(34)
At a particular time of computation, the value of a counting semaphore is 7. Then 20 P operations and ‘x’ V operations were completed on this semaphore. If the final value of the semaphore is 5. x will be
[A]
15
[B]
22
[C]
18
[D]
14
Comment
(35)
Memory protection is of no use in a
[A]
single user system
[B]
non-multitasking system
[C]
non-multiprogramming system
[D]
none of the above
Comment
(36)
Which of the following are single-user operating systems?
[A]
MS-DOS
[B]
UNIX
[C]
XENIX
[D]
Both (A) and (C)
Comment
(37)
The size of the virtual memory depends on the size of the
[A]
address bus
[B]
data bus
[C]
main memory
[D]
none of the above
Comment
(38)
A computer system has 6 tape drives, with 'n' processes competing for them. Each process may need 3 drives. The maximum value of 'n' for which the system is guaranteed to be deadlock free is
Comment
(39)
Which of the following are true?
[A]
Re-entrant procedures can be called recursively.
[B]
Re-entrant procedures cannot be called recursively.
[C]
A re-entrant procedure can be called even before the procedure has not returned from its previous call.
[D]
Both (A) and (C) are true
Comment
(40)
In a system that not support swapping
[A]
the loader binds relocatable addresses to physical addresses.
[B]
the compiler normally binds symbolic addresses to physical addresses.
[C]
the compiler normally binds symbolic addresses (variables) to relocatable addresses.
[D]
Both (A) and (C)
Comment
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