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Study Stuff for MCA Examinations - NIMCET
Study Stuff for MCA Examinations - NIMCET
Previous Year Question (PYQs)
An OS follows round-robin scheduling with time quantum of $4$ ms. Assuming that the CPU is free now and there are $20$ processes waiting in the ready queue, the maximum amount of time that a process waits before getting into the CPU is _____.
Solution
In Round Robin scheduling, each process gets CPU for one time quantum.
Given:
Time quantum $=4$ ms
Number of processes $=20$
Maximum waiting time occurs for the last process in the ready queue.
Before the last process gets CPU, the other $19$ processes will execute.
So,
Maximum waiting time $=19 \times 4$
$=76$ ms
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