operating system Practice Questions Answers Test with Solutions & More Shortcuts

Question : 36

In uni-processor scheduling, the shortest process next policy is

1. Non-preemptive policy
2. Preemptive policy
3. A policy where the process with the shortest expected processing time is selected next.
4. A policy where the process with the shortest expected processing time is not selected.

a) A and D are true

b) B and C are true

c) A and C are true

d) B and D are true.

Question : 37

Which types of file organization are supported by magnetic tape?

a) random files

b) contiguous sequential file

c) indexed sequential file

d) all of the above

Question : 38

The following operating system writes through catches?

a) UNIX

b) DOS

c) ULTRIX

d) XENIX

Question : 39

RAID-O does not support the following characteristics:

A: RAID is a set of physical disk drives viewed by the operating system as a single logical drive.

B: Data distributed across the physical drives of an array.

C: Redemdant disk capacity is used to store parity information, which guarantees data recoverability in case of a disk failure.

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• A: RAID is a set of physical disk drives viewed by the operating system as a single logical drive"/>

a) A and B

b) A only

c) B only

d) C only

Question : 40

Virtual system swapping

a) allocates all of memory to one program

b) pages working set pages in and out as a group

c) is never as efficient as normal paging

d) is used only on systems that are thrashing