Q271. 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
Answer : a
Q272 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
a) 1
b) 2
c) 3
d) 4
Answer : b
Q273. 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
Answer : d
Q274. 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)
Answer : coming soon
Q275.Spatial locality refers to the problem that once a location is referenced
a) it Will referenced again
b) it will not be referenced again
c) a nearby location will be referenced soon
d) none of the above
Answer : c
Q276. Page fault occurs when
a) the page is in main memory
b) the page is not in main memory
c) one tries to divide a number by 0
d) the page is corrupted by application software
Answer : b
Q277. Necessary conditions for deadlock are
a) Non-preemption and circular wait
b) Mutual exclusion and partial allocation
c) Both (a) and (b)
d) None of the above
Answer : coming soon
Q278. At a particular time, the value of a counting semaphore is 10. It will become 7 after
a) 3 V operations
b) 3 P operations
c) 13 P operations and 10 V operations
d) Both (B) and (C)
Answer : d
Q279. Mutual exclusion problem occurs
a) among processes that share resources
b) between two disjoint processes that do not interact
c) among processes that do not use the same resource
d) none of the above
Answer : a
Q280. Which of the following.is a service not supported by the operating system?
a) I/O operation
b) Compilation
c) Accounting
d) Protection
Answer : b