

Operating Systems Concepts - Engineering
Q1: The LRU algorithmA
pages out pages that have been used recently
B
pages out pages that have not been used recently
C
pages out pages that have been least used recently
D
pages out the first page in a given area
E
None of the above
ANS:C - pages out pages that have been least used recently Discards the least recently used items first. This algorithm requires keeping track of what was used when, which is expensive if one wants to make sure the algorithm always discards the least recently used item. General implementations of this technique require keeping "age bits" for cache-lines and track the "Least Recently Used" cache-line based on age-bits. |


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