Cache hit rate = 80%; cache access time = 5 ns; memory access time = 50 ns. Then, effective access time (in ns):

Cache hit rate = 80%; cache access time = 5 ns; memory access time = 50 ns. Then, effective access time (in ns):

  1. a) 15 ns
  2. b) 45 ns
  3. c) 50
  4. d) 55

From the BCS Technical Cadre (CSE) October 2025 – 49th BCS Written (Special) (BPSC) exam, question 64 of 123.

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