engineering computer science MCQ #161

A system has a memory access time of 100 ns and a cache access time of 10 ns. If the cache hit rate is 90%, what is the average memory access time?

engineering computer science MCQ #161

  1. Question 1

    Q1. A system has a memory access time of 100 ns and a cache access time of 10 ns. If the cache hit rate is 90%, what is the average memory access time?

    • A) 19 ns
    • B) 20 ns
    • C) 18 ns
    • D) 15 ns

    Answer: 19 ns

    Explanation: Average access time = (0.9 * 10) + (0.1 * 100) = 9 + 10 = 19 ns.