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1 markComputer Organisation

CAPE Computer Science Unit 1 · 2015 · Paper 2 · Question 2(b)(i)

Questions concerning the fetch-decode-execute cycle.

State the purpose of the 'fetch' operation.

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  1. 2(a)Describe TWO primary functions of the CPU, including a definition of the CPU in your description.[6 marks]
  2. 2(b)(ii)State the purpose of the 'decode' and 'execute' operations.[2 marks]
  3. 2(b)(iii)Define the term 'instruction set'.[1 mark]
  4. 2(c)(i)Explain how ROM differs from RAM.[4 marks]
  5. 2(c)(ii)Explain ONE advantage and ONE disadvantage for each of the two purchasing options: Option 1 (large cache, small RAM) and Option 2 (large RAM, small cache).[4 marks]
  6. 2(d)(i)State the collective purpose of CPU registers.[1 mark]
  7. 2(d)(ii)Name THREE CPU registers and describe the function of each.[6 marks]

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