Assume that the following jobs are to be executed on a single processor system.

Job Id	CPU Burst Time
p	4
q	1
r	8
s	1
t	2

The jobs are assumed to have arrived at time $${0^ + }$$ and in the order $$p,q,r,s,t.$$ Calculate the departure time (completion time) for job $$p$$ if scheduling is round robin with time slice$$1.$$

Which of the following is an example of a spooled device?

The highest-response ratio next scheduling policy favours $$.......$$ jobs, but it also limits the waiting time of $$ .....$$ jobs.

State an undesirable characteristic of each of the following criteria for measuring performance of an operating system:
(a) Turn around time. (b) Waiting time.