Consider a process executing on an operating system that uses demand paging. The average time for a memory access in the system is M units if the corresponding memory page is available in memory, and D units if the memory access causes a page fault. It has been experimental measured that the average time taken for a memory access in the process is X units?
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yes , the average Time for memory access will be change from M to X units ..
as its check for free frame available or not,
If no frames are free, the page replacement algorithm is run to remove a page.
hope it help.
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