The small amount of memory located within the CPU itself is referred to as which cache?

The small amount of memory located within the CPU itself is referred to as which cache?

• A. L2
• B. L1
• C. L3
• D. L4

Answer: (B)

Think of the cache hierarchy as a fast, tiny workspace right next to the processor. The smallest, fastest cache sits directly inside the CPU core and is called level 1 cache. Because it’s so close to the execution units and is split into separate data and instruction caches, it can supply the most frequently used information almost instantly. Its small size is intentional—speed matters most here, so it stays compact. Larger caches exist beyond this immediate vicinity: level 2 cache is bigger and a bit further away, level 3 cache is even larger and often shared among cores, and level 4 is not standard on all CPUs. So the small, on‑chip cache accessed first is level 1 cache.

Think of the cache hierarchy as a fast, tiny workspace right next to the processor. The smallest, fastest cache sits directly inside the CPU core and is called level 1 cache. Because it’s so close to the execution units and is split into separate data and instruction caches, it can supply the most frequently used information almost instantly. Its small size is intentional—speed matters most here, so it stays compact. Larger caches exist beyond this immediate vicinity: level 2 cache is bigger and a bit further away, level 3 cache is even larger and often shared among cores, and level 4 is not standard on all CPUs. So the small, on‑chip cache accessed first is level 1 cache.