Question

A uniprocessor computer system has four processes, which alternate 20ms CPU bursts with 80ms I/O bursts. All the processes were created at nearly the same time. The I/O of all the processes can proceed in parallel. What will be the CPU utilization (over a long period of time) using FCFS and Round Robin (time quantum 10ms) for this system

Answer 1

First come first serve  = 80%

Round Robin = 61.53%

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