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OCR GCSE Computer Science Exam Questions
1.1 Systems Architecture
1.1 question 27
Alicia says: “My computer has a quad‑core processor, so it will run twice as fast as a dual‑core.” Explain why this is not always true.
3
MARKS
Mark scheme
Depends on task/software (may not split across cores); other factors affect speed (clock speed, RAM, cache, storage, GPU). Some tasks are serial; overheads exist.
Exam guidance
Credit discussion of task dependency and other limiting components; accept concurrent processing explanation.
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