operating system Practice Questions Answers Test with Solutions & More Shortcuts

Question : 41

The volatility of a file refers to

a) The number of records added or deleted from a file composed to the original number of records in that file

b) Efficiency with which non-sequential files are processed

c) The extent where the records of the file are contiguous and in proximity to others

d) Percentage of records that has changed in a given time period

Question : 42

Dijkstra's banker's algorithm in an operating-system solves the problem of

a) deadlock avoidance

b) deadlock recovery

c) mutual exclusion

d) context switching

Question : 43

The real time task

a) The tasks that reacts to events that take place in out side world.

b) The tasks that do not reacts to the outside world events.

c) The tasks are independent of the time when it occurs.

d) None of these.

Question : 44

File record length

a) should always be fixed

b) should always be variable

c) depends upon the size of the file

d) should be chosen to match the data character

Question : 45

In multi processor scheduling; A: Gang scheduling, B: Dynamic scheduling, C: Dedicated processor management.; 1- The number of threads in a process can be altered during the course of execution. 2- This provides implicit scheduling defined by the assignment of threads to processors, 3- It is applied to the simultaneous scheduling of threads that make up a single process.

a) A - 1, B - 2, C - 3

b) A - 2, B - 1, C - 3

c) A - 1, B - 3, C - 2

d) A - 3, B - 1, C - 1