operating system set 2 Detailed Explanation And More Example

Question : 1

The portion of the process scheduler in an operating system that dispatches processes is concerned with

a) activating suspended I/O-bound processes

b) temporarily suspending processes when CPU load is too great

c) assigning ready processes to the CPU

d) all of the above

Question : 2

Par begin (P1)

a) Suspends main program, execute procedure P1 and after execution resume main program.

b) Procedure P1 is delayed infinitely due to other procedure are given preference.

c) Procedure P1 is not considered for execution.

d) None of these.

Question : 3

In UNIX process management, the following is true

a) User process enters kernel mode by issuing a system call when interrupt occurs.

b) Kernel mode is executed in user process.

c) User process enters kernel mode with out issuing a system call when interrupt occurs.

d) None of these.

Question : 4

Which O/I are best method for allocating?

a) Contiguous

b) Linked

c) Index

d) All of the above

Question : 5

An attached processor

a) is used one only a few computers

b) causes all processor to function equally

c) is more difficult to implement than a coprocessor

d) is used only for limited, specific functions

Question : 6

Thrashing

a) reduces page I/O

b) decreases the degree of multiprogramming

c) implies excessive page I/O

d) improve the system performance