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ISRO | ISRO CS 2008 | Question 15

  • Last Updated : 11 Jun, 2018

Four jobs to be executed on a single processor system arrive at time 0 in the order A, B, C, D . Their burst CPU time requirements are 4, 1, 8, 1 time units respectively. The completion time of A under round robin scheduling with time slice of one time unit is
(A) 10
(B) 4
(C) 8
(D) 9

Answer: (D)

Explanation: The order of execution of the processes with the arrival time of each process = 0, using round robin algorithm with time quanta = 1

A B C D A C A C A, i.e, after 8 context switches, A finally completes it execution

So, the correct option is (D).

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