operating system set 3 Detailed Explanation And More Example

Question : 1

Access to moving head disks requires three periods of delay before information is brought into memory. The response that correctly lists the three time delays for the physical access of data in the order of the relative speed from the slowest to the fastest is

a) latency time, cache overhead time, seek time

b) transmission time, latency time, seek time

c) seek time, latency time, transmission time

d) cache overhead time, latency time, seek time

Question : 2

Disaster recovery

a) is needed by every installation

b) is never needed

c) varies in degree between installations

d) requires off-site computer for immediate use

Question : 3

he compaction is the technique in memory management that is used to over come

a) Internal fragmentation

b) External fragmentation

c) Both (A) and (B)

d) None of these.

Question : 4

Round robin is a

a) kind of magnetic drum

b) process scheduling policy

c) process synchronization policy

d) memory allocation policy

Question : 5

I/O modules in computer

a) Controls the operation of the computer.

b) Stores data and program.

c) Move data between the computer and external environment.

d) Provides communication among processors and main memory.

Question : 6

A Semaphore is initialized to

a) Negative integer value

b) Positive integer value

c) Non-negative integer value

d) Non-positive integer value.