Practice Quiz

FSOT Pro

Category - Computers

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Why is a CPU’s cache important?
  1. The cache size determines the number of threads the CPU can handle.
  2. The cache size determines how many programs the CPU can interact with.
  3. Without a cache, the CPU can only hold one number at a time.
  4. Without a cache, the CPU will miss lots of clock cycles.
Explanation
Answer: D - Without a cache, the CPU will miss lots of clock cycles. The CPU does calculations; it doesn’t store memory. If data is needed to perform a calculation, then the CPU has to wait for it to arrive. Holding data in the cache minimizes the delay. The faster the CPU, the larger the cache needs to be to make full use of it.
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