Zeal Test Series 2019: Operating System - Process Schedule

Question

CPU bound jobs will hold CPU until exit or I/O. Long periods where no I/O requests issued, and theCPU is held resulting in poor I/O device utilization. This degradation in performance can be seen inwhich of the following?

(A)SJF  ( B) RR    (C)FCFS   (D)SRTF

Comments

I think it should be FCFS

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Yes u r right can u PlZ explain it or hint

Answer 1

The ans is FCFS. It is because if a process with higher CPU time comes first the cpu will be busy executing it and the other processes which require very less CPU time and more I/O time would keep waiting . So the overall I/O device utilization would be poor. This would not be the case with srtf, round robin or sjf.