Operating system MCQ

Question

When the process issues an I/O request :
a) It is placed in an I/O queue
b) It is placed in a waiting queue
c) It is placed in the ready queue
d) It is placed in the Job queue

Answer 1

ANS : a) It is placed in an I/O queue.

You might get confused with option a) and b) The reason why b) is not the answer because waiting queue is not specifically a queue. When the process issues an I/O request it will be waiting (corresponding action ) somewhere but where In the I/O queue.

Waiting for what  a particular I/O device or reception of signal. 

fig. : Queueing-diagram representation of process scheduling.