There are three processes in the scheduling queue and assume that all three of them are ready to run.

Assume that P1 arrived a little before P2; and P2 arrived a little before P3.

Scheduling starts at time t = 0. The CPU and I/O burst patterns of the three processes are as shown below:

Each process exits the system once its CPU and I/O bursts as shown above are

complete. You are given the following schedule.

Please answer the following questions:

(a) What type of scheduler (FCFS, SJF, RR) will produce the above schedule? Explain your answer.

(b) What is the waiting time for each process?

CPU I/O CPU I/O CPU P1 P2 P3 2 2 2 4 P1 is done P2 is done 2 P3 is done 2 2