Let RR3 means Round Robin Scheduling algorithm with time quantum of 3 units and FCFS means First Come First Serve (FCFS) scheduling algorithm. Now if 3 processes P1, P2, P3 has arrival time in order is (0, 2, 4) and execution time is (8, 5, 4) respectively then the completion order of P1, P2, P3 under RR3 and FCFS scheduling is:

RR3 : P1, P2, P3 and FCFS : P3, P2, P1

RR3 : P2, P1, P3 and FCFS : P3, P2, P1

RR3 : P3, P2, P1 and FCFS : P1, P2, P3

RR3 : P2, P1, P3 and FCFS : P1, P2, P3

Let RR3 means Round Robin Scheduling algorithm with time quantum of 3

1.	Let RR3 means Round Robin Scheduling algorithm with time quantum of 3 units and FCFS means First Come First Serve (FCFS) scheduling algorithm. Now if 3 processes P1, P2, P3 has arrival time in order is (0, 2, 4) and execution time is (8, 5, 4) respectively then the completion order of P1, P2, P3 under RR3 and FCFS scheduling is:
A.	RR3 : P2, P1, P3 and FCFS : P3, P2, P1
B.	RR3 : P3, P2, P1 and FCFS : P1, P2, P3
C.	RR3 : P2, P1, P3 and FCFS : P1, P2, P3
D.	RR3 : P1, P2, P3 and FCFS : P3, P2, P1
Answer» D. RR3 : P1, P2, P3 and FCFS : P3, P2, P1

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