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.
Which one of the following is the correct expression for the page fault rate experienced by the process?1
(D - M) / (X - M)
2
(X - M) / (D - M)
3
(D - X) / (D - M)
4
(X - M) / (D - X)
5
Question Not Attempted