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Que. Suppose it takes 100 ns to access page table and 20 ns to access associative memory. If the average access time is 28 ns, the corresponding hit rate is:
a. 100 percent
b. 90 percent
c. 80 percent
d. 70 percent
Answer:90 percent
Anagh R K :(April 16, 2020) access time = time for associative memory * hit ratio + time for main memory (1-hit ratio)
let x be the hit rate
28 = 20*x + 100(1-x)
x = 0.9
hit rate= 90%
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