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OCR GCSE Computer Science Exam Questions
1.1 Systems Architecture
1.1 question 12
Complete the table by naming two CPU registers used during instruction processing and giving one purpose for each.
| Register | Purpose |
|---|---|
4
MARKS
Mark scheme
Correct ticks: Stores a single address → MAR, PC; Stores frequently used instructions → Cache; It is a register → MAR, MDR, PC; Stores all currently running data/instructions → RAM.
Exam guidance
Award 1 per correctly ticked row. If extra ticks on a row, 0 for that row.
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