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MCQs Operating System|UGC-NET|GATE|Computer Science

61.Which of the following is a fundamental process state
A.blocked
B.executing
C.Waiting
D.swapped
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Explanation
62.Which of the following approaches require knowledge of the system state?
A.deadlock detection.
B.deadlock prevention.
C.deadlock avoidance.
D.all of the above.
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63.Which scheduling policy is used for a batch processing operating system
A.Shortest-job First.
B.Round-Robin.
C.Priority Based
D.First-Come-First-Serve.
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64.A critical section is a program segment
A.which is having a higher priority.
B.where shared resources are accessed.
C.which forces deadlocks.
D.where code is shared by programs.
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65.Which amongst the following is a valid page replacement policy?
A.RU policy (Recurrently used)
B.LRU policy (Least Recently Used)
C.only a
D.both a and b
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66.SSTF stands for
A.Shortest-Seek-time-first scheduling
B.simple-seek-time-first
C.smallest – seek-time-first.
D.None of the above
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67.Before proceeding with its execution, each process must acquire all the resources it needs is called
A.pre-emption.
B.circular wait.
C.hold and wait
D.deadlock.
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68.The total time to prepare a disk drive mechanism for a block of data to be read from is its
A.Access Time
B.Seek time
C.latency plus seek time
D.Access time plus seek time plus transmission time
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69.Which of these is a technique of improving the priority of process waiting in Queue for CPU allocation
A.Starvation
B.Relocation
C.Promotion
D.Ageing
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70.In which of the following page replacement policies Balady’s anomaly does not occurs? (A) FIFO (B) LRU (C) LFU (D) NRU
A.All of the above
B.B, C and D
C.A and B.
D.Only A
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Author Does Not claim of any answer these answers are as per expert opinion


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