Question 14231 – Operating-Systems

Three processes arrive at time zero with CPU bursts of 16, 20 and 10 milliseconds. If the scheduler has prior knowledge about the length of the CPU bursts, the minimum achievable average waiting time for these three processes in a non-preemptive scheduler (rounded to nearest integer) is _________ milliseconds.

Correct Answer: A

Question 2 Explanation:

Minimum average waiting time amongst non-preemptive scheduling is given by SJF.
So, avg waiting time = (0+10+26)/3 = 12 ms.