With respect to information technology, which statement best describes 'cache memory'?
AUSB memory connected to a computer to increase its storage space
BAn area of memory that contains settings for operating the computer
CAn area of the hard disk that is used when there is insufficient RAM
DHigh-speed memory included in devices to improve response time ✓ Correct
Correct answer: (D) High-speed memory included in devices to improve response time
Explanation
Cache memory is a small, very fast memory placed near the processor to hold frequently used data and cut response time.
It bridges the speed gap between the fast CPU and slower main memory.
A USB drive adds removable external storage capacity, which is slow and unlike cache.
Memory holding operating settings describes configuration stores such as CMOS, not cache.
A hard-disk region used when RAM is short is virtual memory or swap space, not cache.
Cache is organised in levels L1, L2 and L3, with L1 the fastest and closest to the core.
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