Question

Why is it better for a CPU to have more than one cache?

A. The CPU needs to have backup cache units in case of electrical failure.
B. More cache means more areas to hold data waiting to be processed.
C. More cache units is better for the clock speed of the CPU.
D. The cache units are shared between the CPU and the motherboard.

Answer 1

B. More cache means more areas to hold data waiting to be processed.

Step-by-step explanation:

It is better for a CPU to have more than one cache because more cache means more areas to hold data waiting to be processed, which can significantly improve the CPU's performance. When the CPU requests data, it first checks the L1 cache, which is the smallest and fastest cache on the CPU. If the data is not found in the L1 cache, the CPU then checks the L2 cache, which is larger and slightly slower than the L1 cache. If the data is still not found in the L2 cache, the CPU then checks the L3 cache, which is even larger and slower than the L2 cache. Having multiple levels of cache allows the CPU to quickly access frequently used data, which can help reduce the amount of time spent waiting for data to be fetched from the main memory.