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    Question

    In an operating system, which of the following

    scheduling algorithms minimizes the average waiting time for all processes? 
    A First-Come, First-Served (FCFS) Correct Answer Incorrect Answer
    B Shortest Job First (SJF) Correct Answer Incorrect Answer
    C Round Robin (RR) Correct Answer Incorrect Answer
    D Priority Scheduling Correct Answer Incorrect Answer
    E Multilevel Queue Scheduling Correct Answer Incorrect Answer

    Solution

    The Shortest Job First (SJF) scheduling algorithm minimizes the average waiting time because it schedules processes based on the shortest expected duration. By prioritizing shorter tasks, SJF reduces the time longer processes spend in the queue, thus lowering the overall average waiting time. Why Other Options are Wrong: a) FCFS does not consider process length, which can lead to long waiting times if a long process arrives first. c) Round Robin provides fairness but not efficiency in minimizing waiting time. d) Priority Scheduling focuses on priority rather than process length, potentially causing starvation. e) Multilevel Queue Scheduling is complex and does not aim specifically to minimize waiting time.

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