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GATE | GATE-CS-2009 | Question 8

  • Last Updated : 28 Jun, 2021

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 proves that it is possible to have more page faults when increasing the number of page frames while using the First in First Out (FIFO) page replacement algorithm.

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See the wiki page for an example of increasing page faults with number of page frames.

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