operating system Practice Questions Answers Test with Solutions & More Shortcuts

Question : 41

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 : 42

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 : 43

In disk scheduling when SCAN (Look) policy is applied and when last track reached in one direction

a) The service direction is reversed and scan proceeds in opposite direction.

b) The arm returns to the opposite end of the disk and scan begins again.

c) A and B both true.

d) None of these.

Question : 44

In UNIX process management, the system process runs in

a) Kernel mode only

b) Kernel and user mode both

c) User mode only

d) None of these.

Question : 45

Memory table is used

a) To allocate main memory to processes

b) To allocate secondary memory to processes

c) To manage virtual memory

d) A, B and C are true.