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Chapter 3 · SoftwarePractice
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CONCEPT PRACTICE

First-come first-served scheduling

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2024 Autumn · Subject A · Q15

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Determine waiting times under First-Come-First-Serve scheduling. In milliseconds, P1 arrives at 0 and needs 6 CPU time; P2 arrives at 2 and needs 4; P3 arrives at 4 and needs 9; P4 arrives at 5 and needs 7. Arrival means entry to the ready queue; waiting time is the interval before CPU execution begins. All choices give P1, P2, P3, P4 in that order.

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Source: 2024A_FE-A_Questions.pdf, PDF page 10. ID: 2024A-A-Q015. Explanation written for this textbook.

Original question · Q15
Determine waiting times under First-Come-First-Serve scheduling. In milliseconds, P1 arrives at 0 and needs 6 CPU time; P2 arrives at 2 and needs 4; P3 arrives at 4 and needs 9; P4 arrives at 5 and needs 7. Arrival means entry to the ready queue; waiting time is the interval before CPU execution begins. All choices give P1, P2, P3, P4 in that order.

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