4 months ago

For the following dataset, compute average waiting time for SRTN and SJF.

Process Arrival Time Burst Time

P0 0 7

P1 2 4

P2 4 1

P3 5 4

For SJF (pre-emptive),

- Hamro CSIT

Process	Turnaround Time i.e. TAT (Completion Time-Arrival Time)	Waiting Time i.e. WAT (TAT-Burst Time)
P0	16-0=16	16-7=9
P1	7-2=5	5-4=1
P2	5-4=1	1-1=0
P3	11-5=6	6-4=2

Average waiting time=(9+1+0+2)/4=3 ms

For SRTN,

- Hamro CSIT

Process	Turnaround Time i.e. TAT (Completion Time-Arrival Time)	Waiting Time i.e. WAT (TAT-Burst Time)
P0	16-0=16	16-7=9
P1	7-2=5	5-4=1
P2	5-4=1	1-1=0
P3	11-5=6	6-4=2

Average waiting time=(9+1+0+2)/4=3 ms

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