Paper 1 · ICT
Which of the following is the exact sequence for the flow of data in a computer?
ACache to CPU to Memory
BCache to Memory to CPU
CCPU to Cache to Memory ✓ Correct
DCPU to Memory to Cache
Correct answer: (C) CPU to Cache to Memory — The exact sequence is CPU to cache to memory, so that is the answer.
Explanation
★The exact sequence is CPU to cache to memory, so that is the answer.
★The CPU needs data to work on.
★It first looks in the fast cache that sits next to it.
★If the data is not there, it goes on to the main memory.
★So the flow runs from the CPU to the cache to the memory.
★So the answer is CPU to cache to memory.
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