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Unit 5 · System Software and Operating System Paper 2 CS · December 2022 Shift 2

For the following set of processes scheduled using the FCFS policy, determine the average waiting time. The processes arrived in the order P1, P2, P3, P4.
ProcessBurst Time
P18
P215
P310
P47

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Correct answer: B. 16

Explanation

Waiting times: P1 = 0, P2 = 8, P3 = 23, P4 = 33. Average = 64 / 4 = 16.

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