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Question 30

The Von Neumann architecture relies on system buses to manage the flow of information during the Fetch-Decode-Execute (FDE) cycle.

Complete the table below by writing the correct system bus (Address Bus, Data Bus, or Control Bus) that corresponds to each description.

BusDescription
A bidirectional pathway that transmits the machine-code instructions fetched during the FDE cycle or the operand values written to memory during the Execute phase.
A unidirectional pathway that carries binary memory addresses from the Memory Address Register (MAR) to the address decoder of the main memory.
A pathway that carries command, timing, and status signals (such as read/write lines, clock pulses, and interrupt requests) from the Control Unit to other system components.
[3]
Markscheme

Hardware Questions

  1. GCSE
  2. /Computer Science
  3. /Hardware

76 exam-style questions on Edexcel GCSE Computer Science Hardware, covering Von Neumann architecture and FDE cycle, Secondary storage devices, and Embedded systems. Each one has a worked solution and a mark scheme showing where the marks go.

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