operating system set 6 Detailed Explanation And More Example

Question : 1

In multi processor scheduling : A: Course gained parallelism, B: Medium grained parallelism, C: Fine grained parallelism; 1- Concurrent processes running on a multi programmed uni- processor. 2- Parallel processing or multi tasking is done within a single application. 3- Parallel processing is done within a single instruction stream.

a) A - 1, B - 2, C - 3

b) A - 2, B - 3, C - 1

c) A - 3, B - 2, C - 1

d) A - 1, B - 3, C - 2

Question : 2

In virtual memory management, when local control policy is applied

a) It determines the number of processes that are to be resident in main memory.

b) It determines the number of processes that are to be resident in virtual memory.

c) It determines when a modified page should be written out to secondary memory.

d) None of these.

Question : 3

In shortest service time first policy, applied on disk scheduling, the disk request is selected

a) That requires the least movement of disk arm from its current position.

b) That requires the maximum movement of disk arm from its current position.

c) That is recently received.

d) On random.

Question : 4

In which of the following RAID scheme, redundancy is achieved by the simple expedient of duplicating all the data ?

a) RAID level 0

b) RAID level 1

c) RAID level 2

d) RAID level 3

Question : 5

Thrashing

a) the high paging activity

b) is spending more time in paging than executing

c) both A and B above

d) none of the above

Question : 6

In memory management where replacement is allowed in First-in-First-out (FIFO) fashion

a) The page frames are allocated to a process as circular buffer and pages are removed in random order.

b) The page frames are allocated to a process as circular buffer and pages are removed in round-robin order.

c) Replaces the pages that are least referred.

d) Replaces the pages that are most referred.