ISRO | ISRO CS 2016 | Question 48

In which one of the following page replacement policies, Belady’s anomaly
may occur?
(A) FIFO
(B) Optimal
(C) LRU
(D) MRU

Answer: (A)
Explanation: Belady’s Anomaly is a situation in which increasing the number of frames allocated to a process results in increased number of page faults. This usually happens in FIFO page replacement algorithm. The anomaly occurs when the page replacement algorithm will remove a page that will be needed in the immediate future.
Option (A) is correct.
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