operating system Practice Questions Answers Test with Solutions & More Shortcuts

Question : 11

UNIX recognizes following I/O devices

a) Disk and Tape drives

b) Terminals

c) Communication lines

d) All the above.

Question : 12

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 : 13

The total time to prepare a disk drive mechanism for a block of data to be read from it is

a) seek time

b) Latency

c) latency plus seek time

d) transmission time

Question : 14

In Responsive real time operating system

a) The interruption is acknowledge and operating system response to interrupt.

b) Once the operation starts no interrupt is acknowledge.

c) The operation completes in fixed inter of time.

d) None of these.

Question : 15

In two level scheme if each page is mapped by 4-byte (2 ) page table entry then to create a page table composed of 2 ²⁰ page table entry one requires

a) 2 ²² bytes

b) 2 ¹² bytes

c) 2 ¹⁶ bytes

d) None of these.