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2 marksComputer Organisation

CAPE Computer Science Unit 1 · 2012 · Paper 2 · Question 2(a)(i)

Explain what is meant by the 'instruction set' of a central processing unit (CPU).

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  1. 2(a)(ii)Briefly describe THREE types of instructions that are typically included in an instruction set.[6 marks]
  2. 2(a)(iii)Explain how cache memory can increase the efficiency of data retrieval.[3 marks]
  3. 2(b)(i)Distinguish between the opcode and the operands of an instruction.[2 marks]
  4. 2(b)(ii)Two typical instruction formats are one-address and two-address. Describe how the operands are obtained in EACH case and specify where the results are stored.[6 marks]
  5. 2(c)(i)Explain how a hard disk differs from RAM in terms of access method and access speed.[3 marks]
  6. 2(c)(ii)Explain how RAM differs from a CD-R device in terms of volatility and storage capacity.[3 marks]

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