Practice Quiz

CompTIA A+ 220-901

Category - Hardware

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Which cache has the fastest data retrieval time and why?
  1. L1 cache is the fastest because it is the smallest.
  2. L2 cache is the fastest because it is bigger than the L1 cache.
  3. L1 cache is the fastest because it is on the CPU.
  4. L2 cache is the fastest because it is on a separate chipset.
Explanation
Answer: A - The ability to quickly retrieve data from the CPU cache is dependent on the size of the cache and not its location. L1 is the smallest and therefore the fastest.

Key Takeaway: By loading frequently used bits of data into the L1 cache, the computer can process requests faster. Most computers also have L2 and L3 caches, which are slower than L1 caches but faster than random access memory (RAM).
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