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Assume that for a certain processor, a read request takes 50 nanoseconds on a cache miss and 5 nanoseconds on a cache hit. Suppose while running a program, it was observed that 80% of the processor's read requests result in a cache hit. The average read access time in nanoseconds is ______.
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- 5
- 14
- 7
- 11
Correct Option: B
Average read access time = [(0.8) (5) + (0.2)(50)] ns.
= 4 + 10 = 14 ns
