operating system set 2 Detailed Explanation And More Example

Question : 1

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 : 2

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 : 3

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 : 4

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 : 5

MAR (memory address register)

a) Contains data to be written into memory.

b) Contains data to be read from memory.

c) Specifies location in memory for next read/or writer.

d) Contains address of next instruction to be fetched.

Question : 6

In magnetic disk, density that is in bits per linear inch

a) Increases in moving from the outer most track to the inner most track.

b) Decreases in moving from the outer most track to the inner most track.

c) Remains same in moving from the outer most track to the inner most track.

d) Randomly distributed in moving from the outer most track to the inner most track.