Under what circumstances do page faults occur, Operating System

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Under what circumstances do page faults occur?  Describe the actions taken by the operating system when a page fault occurs.

A page fault happens when an access to a page that has not been brought into main memory takes place. The operating system verifies the memory access, aborting the program if it is invalid. If it is valid, a free frame is located and I/O is requested to read the required page into the free

 


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