Question
Question (4 marks): Explain how cache memory affects the performance of a CPU.
Mark scheme (4 marks):
- Cache is small, fast memory located inside/near the CPU (1).
- Stores frequently used / recently accessed instructions and data (1).
- Faster to access than RAM, so the CPU spends less time waiting for data (1).
- Larger cache means more data can be stored locally → fewer fetches from RAM → faster execution (1).
- Accept reference to L1/L2/L3 hierarchy for additional credit (1, max 4).
4 marks · take your time before peeking.
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Generated by TopMyGrade AI · cross-check official sources before relying on the mark-scheme phrasing.