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GATE | GATE CS 2018 | Question 17

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?

(A)

(D - M) / (X - M)

(B)

(X - M) / (D - M)

(C)

(D - X) / (D - M)

(D)

(X - M) / (D - X)

Answer

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