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______ memory is a small unit of ultra-fast memory that is used to store recently accessed or frequently accessed data so that the CPU does not have to retrieve this data from slower memory circuits such as RAM.

Question

BlackTom AI · Accepted Answer

The question describes a memory component that acts as a tiny, ultra-fast storage area for data recently or frequently accessed by the CPU, so that slower memory like RAM isn’t needed every time. 
Option 1: Secondary. This term typically refers to non-volatile or long-term storage such as hard drives or SSDs, not a tiny ultra-fast buffer used by the CPU, so this choice is inaccurate for the described function. 
Option 2: Fast. While it hints at speed, it is not the standard name of the memory type in question; it’s too generic and does not specify the memory hierarchy component that mirrors the description. 
Option 3: Cache. This is the established name for the small, ultra-fast memory near or on the CPU that stores recently or frequently accessed data to speed up access to RAM, matching the definition given. The explanation highlights how cache reduces latency by keeping hot data close to the processor. 
In summary, the description aligns with the concept of cache memory, whereas secondary memory refers to long-term storage and “fast” is too vague to designate the specific hardware role described.

Blank ______ memory is a small unit of ultra-fast memory that is used to store recently accessed or frequently accessed data so that the CPU does not have to retrieve this data from slower memory circuits such as RAM.

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