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CS Professional · Artificial Intelligence, Data Analytics and Cyber Security - Laws and Practice · Computer Hardware and Software

A firm's analyst finds that its server runs slowly although the CPU clock speed is high, because the CPU repeatedly waits for data fetched from main memory. Which hardware change most directly reduces this specific delay by keeping frequently used data near the processor?

Increasing the CPU cache size helps most, because cache is very fast memory placed close to the processor that stores frequently used data and instructions. This reduces the time the CPU waits for slower main memory, whereas printers, monitors and optical drives do not affect that delay.

  1. AIncreasing the CPU cache sizeCorrect
  2. BAdding a larger printer buffer
  3. CReplacing the monitor with a higher resolution one
  4. DAdding more optical disk drives

Explanation

Cache is small, very fast memory close to the CPU storing frequently used data and instructions, cutting wait time for main memory. The other changes do not affect CPU-memory latency.

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