operating system Practice Questions Answers Test with Solutions & More Shortcuts

Question : 46

The Least Recently Used (LRU) policy

a) Replaces the page in memory that has not been referenced for the least time.

b) Replaces the page in memory that has not been referenced for the longest time.

c) Replaces the page in memory in round robin fashion.

d) None of these.

Question : 47

Memory that is located on the disk either Hard or floppy is referred as

a) Virtual memory

b) Real memory

c) Main memory

d) None of these.

Question : 48

In multi processor scheduling, independent parallelism indicates

a) There is synchronization among processes at gross level.

b) There is no explicit synchronization among processes.

c) A parallel processing or multi tasking is done within a single application.

d) None of these.

Question : 49

Program counter (PC) contains

a) Address of an instruction to be fetched

b) Instructions most recently fetched

c) Data to be written into memory

d) Data to be read from memory

Question : 50

A solution to the Dining Philosophers Problem which avoids deadlock is

a) ensure that all philosophers pick up the left fork before the right fork.

b) ensure that all philosophers pick up the right fork before the left fork.

c) ensure that one particular philosopher picks up the left fork before the right fork, and all other philosophers pick up the right fork before the left fork.

d) none of the above