operating system set 1 Detailed Explanation And More Example

Question : 1

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

Question : 2

The activity of a file

a) is a low percentage of number of records that are added to or deleted from a file

b) is a measure of the percentage of existing records updated during a run

c) refers to how closely the files fit into the allocated space

d) is a measure of the number of records added or deleted from a file compassed with the original number of records

Question : 3

RAID (Redundant Array of Independent Disks) scheme consists of

a) Five levels from one to six.

b) Six levels, from zero to five.

c) Seven levels, from zero to six.

d) None of these.

Question : 4

The following operating system writes through catches?

a) UNIX

b) DOS

c) ULTRIX

d) XENIX

Question : 5

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 : 6

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.