Quiz: What Registers Do (Big Picture)
OCR GCSE J277 Computer Science specification
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Building on what you've learned about the CPU and the fetch-decode-execute cycle, let's test your knowledge of what registers do and why they're essential!
Which register holds the address of the next instruction to be executed?
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Which of the following are roles of CPU registers? (Select all that apply)
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The {{blank0}} holds the running total of calculations, while the {{blank1}} temporarily holds the data being fetched or stored.
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Which register is responsible for storing the memory location to be accessed?
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Which registers are involved in the fetch stage of the fetch-decode-execute cycle? (Select all that apply)
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The register that temporarily holds data fetched from memory is called the {{blank0}}.
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What is the role of the Memory Data Register (MDR)?
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