Paper 1 · ICT
Which of the following memories has the shortest access time?
ACache memory ✓ Correct
BMagnetic bubble memory
CMagnetic core memory
DRAM
Correct answer: (A) Cache memory — Cache memory has the shortest access time, so that is the answer.
Explanation
★Cache memory has the shortest access time, so that is the answer.
★Cache is a very fast memory placed close to the CPU.
★The processor can reach its data more quickly than any of the others listed.
★So it has the shortest access time.
★Magnetic bubble, magnetic core and even RAM are slower to reach.
★So the answer is cache memory.
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