Wednesday, July 10, 2013

What is page fault?



The condition that arises whenever a process reference to a page that is not currently resided in the physical memory but is present in the auxiliary memory is called page fault. At the time page fault occur, the required page is fetched from the auxiliary memory and resided into an empty page frame (or block) but if there is no empty page frame then an appropriate page is selected to replace it with the referenced page using a page replacement algorithm.

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