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Enhanced Second chance algorithm
In this a modify bit is as well used. Now if the ordered pair of reference and modify is
(0,0) neither recently used nor modified - the best page to replace.
(1,1) both referenced and modified- the worst to replace
(1,0) referenced but not modified
(0,1) not recently used but modified.
This algorithm is utilized in the Macintosh virtual memory management scheme.
LRU approximation page replacement In this we utilize the reference bit associated with the page entry to choose a page to be removed. The various algorithms used for the imp
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Define race condition. When various process access and manipulate similar data concurrently, then the outcome of the execution depends on certain order in which the access take
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