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Processes P1, P2 and P3 arrive at time 0 with CPU bursts of 10, 4 and 7 ms respectively. Under Round Robin scheduling with a time quantum o…

1727Medium DSSSB TGT Computer Science 0 replies

Processes P1, P2 and P3 arrive at time 0 with CPU bursts of 10, 4 and 7 ms respectively. Under Round Robin scheduling with a time quantum of 3 ms, the average waiting time is

A11 ms
B10 ms
C9 ms
D12 ms

Correct answer: A

Explanation

The completion times are 21, 13 and 20 ms, so the waiting times are 11, 9 and 13 ms, and their average is 33/3 = 11 ms.

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