Type of priority in Multiprogramming OS?

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Hi! In a multiprogramming operating system, how does the OS decide which program will be executed next? I mean I know that a priority is set but what are the basis on which this priority is set? Is there some kind of algorithm used or does the heavier program(more data) gets executed first?

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Answered By 0 points N/A #183320

Type of priority in Multiprogramming OS?

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  •     In Multiprogramming operating system, the Algorithms used to select the next job is Priority Scheduling Algorithm.
  •     In this Algorithm based on OS to OS the criteria for selection of job is different.
  •     In the best and efficient cases these are the names of Algorithms that come under Dynamic Priority Scheduling which are widely used.
  •     Least slack time scheduling: Task with the minimum slack time is assigned the highest priority and selected after completion of one job for execution.
  •     Earliest deadline first scheduling: The Process which is closest to its deadline is assigned the highest priority and selected for execution from the waiting queue.

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