Question

A system uses 4 page frames for storing process pages in main memory.
It uses the page replacement policy where it replaces the page that has not been
referred by the CPU for the longest time . Assume that all the page frames are
initially empty. What is the total number of page faults that will occur while
processing the page reference string given below
4,7,6,15,2,7,65,4, 1,2,3,7, 2,4,7,153
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Answer 1

Answer:

please answer my question please