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 are important!
What is the main purpose of the Program Counter (PC) register?
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Which of the following are functions of the Memory Address Register (MAR)? (Select all that apply)
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The {{blank0}} is a register that temporarily holds the result of calculations performed by the ALU.
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Match the items on the left with their correct pairs on the right
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If the Program Counter (PC) starts at 100 and increments by 4 each cycle, what will its value be after 3 cycles?
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Match the items on the left with their correct pairs on the right
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Match the items on the left with their correct pairs on the right
Which register is responsible for keeping track of the memory address of the next instruction to execute?
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The Memory Data Register (MDR) stores {{blank0}} that has been fetched or is about to be written to memory.
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Match the items on the left with their correct pairs on the right
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