Operating System Mcqs

Page No. 11

Under multiprogramming, turnaround time for short jobs is usually ________ and that for long jobs is slightly ___________


aLengthened; Shortened

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bShortened; Lengthened

✓


cShortened; Shortened

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dShortened; Unchanged

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View Answer Shortened; Lengthened

Which of the following algorithms tends to minimize the process flow time?


aFirst come First served

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bShortest Job First

✓


cEarliest Deadline First

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dLongest Job First

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View Answer Shortest Job First

Orders are processed in the sequence they arrive if _______ rule sequences the jobs.


aearliest due date

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bslack time remaining

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cfirst come, first served

✓


dcritical ratio

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There are 10 different processes running on a workstation. Idle processes are waiting for an input event in the input queue. Busy processes are scheduled with the Round-Robin time sharing method. Which out of the following quantum times is the best value for small response times, if the processes have a short runtime, e.g. less than 10ms?


atQ = 15ms

✓


btQ = 40ms

✖


ctQ = 45ms

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dtQ = 50ms

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View Answer tQ = 15ms

What is Scheduling?


aallowing a job to use the processor

✓


bmaking proper use of processor

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call of the mentioned

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dnone of the mentioned

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The strategy of making processes that are logically runnable to be temporarily suspended is called ____________


aNon preemptive scheduling

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bPreemptive scheduling

✓


cShortest job first

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dFirst come First served

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View Answer Preemptive scheduling

What is FIFO algorithm?


afirst executes the job that came in last in the queue

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bfirst executes the job that came in first in the queue

✓


cfirst executes the job that needs minimal processor

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dfirst executes the job that has maximum processor needs

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Complex scheduling algorithms ____________


aare very appropriate for very large computers

✓


buse minimal resources

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cuse many resources

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dall of the mentioned

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The portion of the process scheduler in an operating system that dispatches processes is concerned with ____________


aassigning ready processes to CPU

✓


bassigning ready processes to waiting queue

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cassigning running processes to blocked queue

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dall of the mentioned

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With round robin scheduling algorithm in a time shared system ____________


ausing very large time slices converts it into First come First served scheduling algorithm

✓


busing very small time slices converts it into First come First served scheduling algorithm

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cusing extremely small time slices increases performance

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dusing very small time slices converts it into Shortest Job First algorithm

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