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CAPE Computer Science Unit 1 · 2016 · Paper 2

20 questions and parts from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

Practise this paper
  1. 1(a)4 marksConstruct the truth table for the circuit in Figure 1.
  2. 1(b)4 marksConstruct a truth table for the proposition P ∧ Q.
  3. 1(c)2 marksDefine the term 'program counter'.
  4. 1(d)4 marksAdd the two 8-bit binary numbers stored in Register 1 (10010111) and Register 2 (11011000), showing all working, and explain what will be stored in 8-bit Register 3.
  5. 1(e)3 marksConvert the decimal number 13.25 to binary, showing all working.
  6. 1(f)4 marksDefine what a 'multiplexor' is, and draw a block diagram to support your answer.
  7. 1(g)4 marksExplain why multiplexing is important and provide a scenario to support your answer.
  8. 2(a)4 marksProvide ONE example for EACH of the missing entries labelled 1, 2, 3 and 4 in Figure 2.
  9. 2(b)(i)2 marksExplain the purpose and core benefit of a surge protector in this scenario.
  10. 2(b)(ii)2 marksExplain the purpose and core benefit of a voltage regulator in this scenario.
  11. 2(b)(iii)2 marksExplain the purpose and core benefit of a UPS in this scenario.
  12. 2(c)3 marksDefine the term 'clock speed' in relation to a processor, and give TWO examples of CPU clock speeds using different units of measure.
  13. 2(d)4 marksDescribe ONE input device and ONE output device suitable for use by a visually impaired person.
  14. 2(e)5 marksExplain the main difference between a supercomputer and a mainframe computer, and give TWO examples of how each type is used.
  15. 2(f)3 marksWrite a sequence of processor instructions to perform a mathematical calculation, including THREE different instructions.
  16. 3(a)15 marksWrite an algorithm to read the customer data and determine the total outstanding fines for each customer, the total fines paid under category N and under category P, the overall total fines paid, the total number of…
  17. 3(b)4 marksDistinguish between 'bounded iteration' and 'unbounded iteration'.
  18. 3(c)6 marksWrite an algorithm to calculate the sum of all multiples of 7 between 21 and 210 inclusive.
  19. 4(a)11 marksConstruct a flowchart to represent the provided pseudocode algorithm for reading customer sales until 'enddata'.
  20. 4(b)6 marksA communications company charges 1.25 per minute for the first 20 minutes and 0.25 per minute for any additional minutes. Write an algorithm that reads an integer representing call duration in minutes, then calculates…

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