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    CPU Scheduling Practice Questions for GATE CS

    Solve 0+ CPU Scheduling practice questions for GATE CS with answers and detailed solutions. Free sample questions below.

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    CPU Scheduling Practice Questions for GATE CS

    Solve 0+ CPU Scheduling practice questions for GATE CS with answers and detailed solutions. Free sample questions below.

    Chapter Roadmap: CPU Scheduling

    The CPU Scheduling Journey
    Foundations & Metrics: Arrival, Burst, Completion, Turnaround, Waiting, Response.
    SJF & SRTF: Optimal algorithms for minimizing average waiting time.
    Scheduling Properties: Preemption overhead, starvation, convoy effect.
    Round Robin (RR): Time-slicing, quantum selection, context switches.
    Priority & Multiprocessor: Diverse workloads and multi-CPU distribution.

    Topic Hero: The Core Philosophy of SJF and SRTF

    The primary objective of any scheduling algorithm is to optimize system metrics. For batch systems, the most critical metric is average waiting time.
    The Mathematical Truth: To minimize the sum of waiting times, you must execute the shortest jobs first. If you execute a long job first, all subsequent short jobs are forced to wait for the entire duration of that long job.
    • Shortest Job First (SJF): Non-preemptive. Once a process gets the CPU, it runs to completion.
    • Shortest Remaining Time First (SRTF): Preemptive. If a newly arrived process has a burst time strictly less than the remaining time of the currently running process, the CPU is snatched away.
    Note: Both algorithms are mathematically proven to give the minimum average waiting time for a given set of processes.

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