operating system Practice Questions Answers Test with Solutions & More Shortcuts

Question : 6

Following is the correct definition of a valid process transition within an operating system

a) wake up : ready -> running

b) dispatch: ready -> running

c) block: ready -> blocked

d) timer run out : ready -> blocked

Question : 7

Following is/are operating system used in computers

a) MS-DOS

b) OS/2

c) UNIX

d) All of the above

Question : 8

The operating system control tables maintains file table, because

a) These tables manage I/O devices and channels of the computer system.

b) These tables provide information about the existence of files, their location on secondary memory and their current status.

c) These tables provide information to manage process.

d) None of these.

Question : 9

When an interrupt occurs, an operating system

a) ignores the interrupt

b) always changes state of interrupted process after processing the interrupt

c) always resumes execution of interrupted process after processing the interrupt

d) may change state of interrupted process to blocked and schedule another process

Question : 10

Thrashing can be avoided if

a) the pages, belonging to the working set of the programs are in main memory

b) the speed of CPU is increased

c) the speed of I/O processor is increased

d) all of the above