A computer system has a cache access time of 100 ns, a main-memory access time of 1100 ns and a hit ratio of 0.9. The average access time would be:
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Correct answer: A. 200 ns
Explanation
Taking cache and memory as alternatives: 0.9 × 100 + 0.1 × 1100 = 90 + 110 = 200 ns.More Computer System Architecture questions
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