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Computer Architecture · CAPE Computer Science Unit 1

43 past-paper questions on Computer Architecture, part of Computer Architecture and Organisation, from every CAPE Computer Science Unit 1 paper on Quelpr.

Practise Computer Architecture
  1. 3(c)(ii)2 marks· CAPE Computer Science Unit 1 · 2006 · Paper 1Explain the term 'multiprocessing' and provide an illustrative example.
  2. 1(b)8 marks· CAPE Computer Science Unit 1 · 2006 · Paper 2Explain in detail how an operating system can execute THREE processes at the same time.
  3. 2(c)(i)7 marks· CAPE Computer Science Unit 1 · 2006 · Paper 2Draw a diagram to show the layers of the OSI model for computer communication.
  4. 2(c)(ii)7 marks· CAPE Computer Science Unit 1 · 2006 · Paper 2With respect to the OSI model diagram drawn in (c)(i), clearly state ONE function of EACH of the layers drawn.
  5. 1(e)(ii)4 marks· CAPE Computer Science Unit 1 · 2008 · Paper 2Explain how an interrupt is handled in the operating system of a computer.
  6. 1(a)6 marks· CAPE Computer Science Unit 1 · 2009 · Paper 2Draw the logic symbol and provide the corresponding truth table for THREE primary logic gates.
  7. 1(b)6 marks· CAPE Computer Science Unit 1 · 2009 · Paper 2Using the primary logic gates from part (a), design and draw a circuit that implements the truth table of the exclusive-OR gate shown in Table 1.
  8. 1(c)6 marks· CAPE Computer Science Unit 1 · 2009 · Paper 2Draw a clearly labelled block diagram of a 4 x 1 multiplexer having 4 inputs and 1 output.
  9. 1(a)3 marks· CAPE Computer Science Unit 1 · 2010 · Paper 2Give the truth tables of the THREE primary logic gates, appropriately labelled.
  10. 1(b)4 marks· CAPE Computer Science Unit 1 · 2010 · Paper 2Explain how a 4-bit binary counter works, specifying the range of values counted.
  11. 1(c)(i)3 marks· CAPE Computer Science Unit 1 · 2010 · Paper 2Draw a clearly labelled block diagram of a 2-to-4 line decoder.
  12. 1(c)(ii)2 marks· CAPE Computer Science Unit 1 · 2010 · Paper 2Give the truth table of a 2-to-4 line decoder.
  13. 1(c)(iii)6 marks· CAPE Computer Science Unit 1 · 2010 · Paper 2Draw a clearly labelled circuit of a 2-to-4 line decoder constructed from one or more of the primary logic gates.
  14. 1(a)6 marks· CAPE Computer Science Unit 1 · 2011 · Paper 2Using only primary logic gates, design and draw the circuit for the given truth table.
  15. 1(b)4 marks· CAPE Computer Science Unit 1 · 2011 · Paper 2Write down the truth table (listing all input bit patterns and corresponding outputs) for the logic circuit shown in Figure 1.
  16. 1(c)(i)2 marks· CAPE Computer Science Unit 1 · 2011 · Paper 2Explain what is meant by the term 'Flip-flop'.
  17. 1(c)(ii)2 marks· CAPE Computer Science Unit 1 · 2011 · Paper 2Explain what is meant by the term 'Multiplexor'.
  18. 1(d)(i)3 marks· CAPE Computer Science Unit 1 · 2011 · Paper 2Draw a clearly labelled block diagram of a 2-to-4 line decoder.
  19. 1(d)(ii)3 marks· CAPE Computer Science Unit 1 · 2011 · Paper 2A circuit controls four light bulbs B1, B2, B3, and B4 such that only one is on at any time. State how a 2-to-4 line decoder can be used in this circuit and explain how the bulbs are switched on.
  20. 1(a)(i)4 marks· CAPE Computer Science Unit 1 · 2012 · Paper 2Give the truth table of the circuit.
  21. 1(a)(ii)6 marks· CAPE Computer Science Unit 1 · 2012 · Paper 2Using only primary logic gates, design and draw the circuit for F.
  22. 1(b)(i)4 marks· CAPE Computer Science Unit 1 · 2012 · Paper 2Draw a clearly labelled block diagram of a 4-to-1 line multiplexer.
  23. 1(b)(ii)6 marks· CAPE Computer Science Unit 1 · 2012 · Paper 2Explain how a multiplexer can be used for the described purpose and discuss how data from each sensor is transmitted through the alarm notification line.
  24. 1(a)(i)4 marks· CAPE Computer Science Unit 1 · 2013 · Paper 2Draw a clearly labelled block diagram of a 4 to 1 line multiplexer.
  25. 1(a)(ii)4 marks· CAPE Computer Science Unit 1 · 2013 · Paper 2Four lines, l0, l1, l2, l3, are connected to the input lines of a 4 to 1 line multiplexer. Explain how the multiplexer can send the signal in l1 as output for one second followed by the signal in l3.
  26. 1(a)(iii)3 marks· CAPE Computer Science Unit 1 · 2013 · Paper 2Give TWO properties of a flip-flop and state ONE use of this device.
  27. 1(d)(i)2 marks· CAPE Computer Science Unit 1 · 2013 · Paper 2Draw the truth table for a NOT gate.
  28. 1(d)(ii)2 marks· CAPE Computer Science Unit 1 · 2013 · Paper 2Draw the truth table for an AND gate.
  29. 1(d)(iii)2 marks· CAPE Computer Science Unit 1 · 2013 · Paper 2Draw the truth table for an OR gate.
  30. 1(a)5 marks· CAPE Computer Science Unit 1 · 2014 · Paper 2Draw a clearly labelled block diagram of a 2 to 1 line multiplexer.
  31. 1(b)2 marks· CAPE Computer Science Unit 1 · 2014 · Paper 2Explain what is meant by the term 'logic gate'.
  32. 1(c)4 marks· CAPE Computer Science Unit 1 · 2014 · Paper 2Write the truth table for the circuit shown in Figure 1 by listing all possible input bit patterns and their corresponding outputs.
  33. 1(d)2 marks· CAPE Computer Science Unit 1 · 2014 · Paper 2State which of the following terms are associated with a single output value: Decoder, Flip-flop, Multiplexor.
  34. 1(e)(i)2 marks· CAPE Computer Science Unit 1 · 2014 · Paper 2If there are three bits needed to display a digit, calculate how many digits this decoder can display.
  35. 1(e)(ii)5 marks· CAPE Computer Science Unit 1 · 2014 · Paper 2List the letters of the segments that must be switched on to display the number 5.
  36. 1(a)(i)8 marks· CAPE Computer Science Unit 1 · 2015 · Paper 2Write down the truth table showing all possible input bit combinations and outputs for the alarm scenario.
  37. 1(a)(ii)4 marks· CAPE Computer Science Unit 1 · 2015 · Paper 2Using only primary logic gates, design and draw the circuit for the alarm system.
  38. 1(b)2 marks· CAPE Computer Science Unit 1 · 2015 · Paper 2Explain the meaning of the term 'demultiplexer'.
  39. 1(c)3 marks· CAPE Computer Science Unit 1 · 2015 · Paper 2Draw a clearly labelled block diagram of a 3-to-8 line decoder.
  40. 1(a)4 marks· CAPE Computer Science Unit 1 · 2016 · Paper 2Construct the truth table for the circuit in Figure 1.
  41. 1(b)4 marks· CAPE Computer Science Unit 1 · 2016 · Paper 2Construct a truth table for the proposition P ∧ Q.
  42. 1(f)4 marks· CAPE Computer Science Unit 1 · 2016 · Paper 2Define what a 'multiplexor' is, and draw a block diagram to support your answer.
  43. 1(g)4 marks· CAPE Computer Science Unit 1 · 2016 · Paper 2Explain why multiplexing is important and provide a scenario to support your answer.

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