operating system set 2 Detailed Explanation And More Example

Question : 1

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

Question : 2

UNIX recognizes following I/O devices

a) Disk and Tape drives

b) Terminals

c) Communication lines

d) All the above.

Question : 3

Local replacement

a) allows a process to select a replacement frame from the set of all frames

b) requires that each process selects from only its own set of allocated frames

c) both (A) and (B) above

d) none of the above

Question : 4

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 : 5

Following is/are operating system used in computers

a) MS-DOS

b) OS/2

c) UNIX

d) All of the above

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