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IES 2018 - Round robin scheduling

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Three processors with their respective process IDs given by P1, P2 and P3, having estimated completion time of 8 ms, 4 ms and 2 ms, respectively, enter a ready queue together in the order P1, P2 and P3. What is the average turn time in the Round Robin Scheduling Algorithm with time 2 ms?

 

(a) 10 ms

(b) 15 ms

(c) 20 ms

(d) 25 ms
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