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Systems architecture

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Question 9

Five components of a CPU are listed below:

  • A. Accumulator (ACC)
  • B. Memory Address Register (MAR)
  • C. Control Unit (CU)
  • D. Arithmetic Logic Unit (ALU)
  • E. Program Counter (PC)

For each row in Table 1, choose the letter (A, B, C, D, or E) that best matches the description. Letters should not be used more than once.

Table 1

DescriptionLetter (A-E)
Holds the memory address of the next instruction to be fetched.
Decodes instructions and sends control signals to coordinate other CPU components.
A register that temporarily stores the immediate results of calculations.
[3]
Markscheme

Systems architecture Questions

  1. GCSE
  2. /Computer Science
  3. /Systems architecture

37 exam-style questions on AQA GCSE Computer Science Systems architecture. Each one has a worked solution and a mark scheme showing where the marks go.

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