engineering computer science MCQ #189

A processor has a 2-level cache hierarchy. If L1 cache has a hit rate of 90% and L2 cache has a hit rate of 80%, what is the overall hit rate?

engineering computer science MCQ #189

  1. Question 1

    Q1. A processor has a 2-level cache hierarchy. If L1 cache has a hit rate of 90% and L2 cache has a hit rate of 80%, what is the overall hit rate?

    • A) 0.98
    • B) 0.95
    • C) 0.92
    • D) 0.9

    Answer: 0.98

    Explanation: Overall hit rate = L1 hit rate + L1 miss rate * L2 hit rate = 0.9 + 0.1 * 0.8 = 0.98