GATE | GATE CS 2013 | Question 65

A scheduling algorithm assigns priority proportional to the waiting time of a process. Every process starts with priority zero (the lowest priority). The scheduler re-evaluates the process priorities every T time units and decides the next process to schedule. Which one of the following is TRUE if the processes have no I/O operations and all arrive at time zero?
(A) This algorithm is equivalent to the first-come-first-serve algorithm
(B) This algorithm is equivalent to the round-robin algorithm.
(C) This algorithm is equivalent to the shortest-job-first algorithm..
(D) This algorithm is equivalent to the shortest-remaining-time-first algorithm


Answer: (B)

Explanation: The scheduling algorithm works as round robin with quantum time equals to T. After a process’s turn comes and it has executed for T units, its waiting time becomes least and its turn comes again after every other process has got the token for T units.

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