Optimal page replacement ____.
A) is the page-replacement algorithm most often implemented
B) is used mostly for comparison with other page-replacement schemes
C) can suffer from Belady's anomaly
D) requires that the system keep track of previously used pages

Question

Quizplus · Accepted Answer

Optimal page replacement is primarily used as a benchmark for comparing the efficiency of other page replacement algorithms because it has the lowest possible page fault rate. It is theoretical and requires future knowledge of the reference string, which is not possible in practical systems.

Optimal Page Replacement ____