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 fetched?
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Which of the following are true about registers? (Select all that apply)
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The {{blank0}} holds the result of calculations performed by the CPU.
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Match the items on the left with their correct pairs on the right
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What is the purpose of the Memory Address Register (MAR)?
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How many bits are required to represent 255 in binary?
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The {{blank0}} holds data being fetched from memory or written back to memory.
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Match the items on the left with their correct pairs on the right
Which register is responsible for storing the running totals during calculations?
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