ITPEC FE Morning October 2023 Question 12
Source exam: ITPEC FE Morning October 2023Topic: Computer Systems & Hardware
ITPEC FE Morning October 2023 — Question 12 of 80
Cache hit vs. cache miss — where the CPU fetches data from.
- •Cache hit — data is in cache → CPU reads from cache (fast)
- •Cache miss — data is not in cache → CPU reads from main memory (slow)
Why not others:
- (a) Cache hit fetches from cache, not ROM
- (b) Cache hit fetches from cache, not main memory
- (c) Cache miss means data is absent from cache — CPU goes to main memory
Key rule: hit → cache; miss → main memory.
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