21 votes 21 votes The optimal page replacement algorithm will select the page that Has not been used for the longest time in the past Will not be used for the longest time in the future Has been used least number of times Has been used most number of times Operating System gatecse-2002 operating-system page-replacement easy + – Kathleen asked Sep 15, 2014 Kathleen 8.3k views answer comment Share Follow See 1 comment See all 1 1 comment reply iarnav commented Sep 30, 2018 i edited by Lakshman Bhaiya Jan 6, 2019 reply Follow Share The optimal page replacement algorithm will select the page that - Will not be used for the longest time in the future. And that's the reason this optimal Page replacement algorithm is not a practical one and only used for benchmarking because one can never look into future and make decisions in present and that implies in real life too otherwise life would be no fun and boring because then we all take the perfect decisions! 7 votes 7 votes Please log in or register to add a comment.
Best answer 40 votes 40 votes Optimal page replacement algorithm will always select the page that will not be used for the longest time in the future for replacement, and that is why the it is called optimal page replacement algorithm. Hence, (B) choice. Arjun answered Dec 1, 2014 • edited Jun 28, 2018 by kenzou Arjun comment Share Follow See 1 comment See all 1 1 comment reply Shreya2002 commented Jul 24, 2022 reply Follow Share option(a) – Least Recently used Page replacement algo option(b) – Optimal Page replacement algo option(c) – Least frequently used Page replacement algo option(d) – Most Frequently used Page replacement algo 3 votes 3 votes Please log in or register to add a comment.