operating system set 6 Detailed Explanation And More Example

Question : 1

The cluster is a case of

a) Distributed memory

b) Shared memory

c) Master/slave architecture

d) Symmetric multi processor.

Question : 2

The wait operation

a) Decrements the semaphore value

b) Increments the semaphore value

c) Fixes the semaphore value

d) None of these.

Question : 3

Operating System is

a) Software

b) Hardware

c) Software and Hardware both

d) None of these.

Question : 4

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 : 5

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 : 6

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