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Operating Systems | CPU Scheduling | Question 6
  • Last Updated : 15 Jun, 2015
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Which of the following is FALSE about SJF (Shortest Job First Scheduling)?

S1: It causes minimum average waiting time
S2: It can cause starvation

(A) Only S1
(B) Only S2
(C) Both S1 and S2
(D) Neither S1 nor S2

Answer: (D)


  1. Both SJF and Shortest Remaining time first algorithms may cause starvation. Consider a situation when long process is there in ready queue and shorter processes keep coming.
  2. SJF is optimal in terms of average waiting time for a given set of processes, but problems with SJF is how to know/predict time of next job.

Refer Process Scheduling for more details.

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