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Programming-for-Output-Problems
October 12, 2023
Data-Structures
October 12, 2023
Programming-for-Output-Problems
October 12, 2023
Data-Structures
October 12, 2023

Operating-Systems

Question 53

Let the page fault service time to 10 ms in a computer with average memory access time being 20 ns. If one page fault is generated for every 106 memory accesses, what is the effective access time for the memory?

A
21 ns
B
30 ns
C
23 ns
D
35 ns
Question 53 Explanation: 
P = page fault rate
EA = p × page fault service time
+ (1 – p) × Memory access time
= 1/106×10×10<sup6+(1-1/106)×20 ≅ 29.9 ns</sup
Correct Answer: B
Question 53 Explanation: 
P = page fault rate
EA = p × page fault service time
+ (1 – p) × Memory access time
= 1/106×10×10<sup6+(1-1/106)×20 ≅ 29.9 ns</sup
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