operating system set 5 Detailed Explanation And More Example

Question : 1

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 : 2

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

Question : 3

I/O OBR (I/O Buffer register) is

a) Used for the exchange of data between an I/O module and the processor.

b) Specifies particular I/O device.

c) (A) and (B) both true.

d) (A) and (B) both false.

Question : 4

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 : 5

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 : 6

Wild-card specifies

a) provide an easy way of finding groups of related files

b) are only used when printing the contents of files

c) can be used when writing a file

d) allow several files to be read simultaneously