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9618/33

Computer Science 9618/33 — October/November 2023

Cambridge A-Level · Advanced Theory · worked solutions for every part, with the mark scheme

12
questions
75
marks
90
minutes

Topics Data Representation · Hardware and Virtual Machines · System Software · Further Programming · Computational Thinking and Problem-solving · Communication and Internet Technologies · +1 more

Q1Data RepresentationFree sample

Real numbers are stored in a computer using floating-point representation with:

  • 12 bits for the mantissa
  • 4 bits for the exponent
  • two’s complement form for both the mantissa and exponent.
(a)

Write the normalised floating-point representation of +65.25 in this system.

Show your working.

Working .....................................................................................................................................

3M
(b)

Explain the problem that will occur in storing the normalised floating-point representation of +65.20 in this system.

2M

The rest of this paper

11 more questions
  • Q2Communication and Internet Technologies6M
  • Q3Data Representation4M
  • Q4Data Representation6M
  • Q5Hardware and Virtual Machines4M
  • Q6Hardware and Virtual Machines6M
  • Q7System Software5M
  • Q8Data Representation · Further Programming8M
  • Q9System Software · Computational Thinking and Problem-solving9M
  • Q10Computational Thinking and Problem-solving10M
  • Q11Further Programming8M
  • Q12Artificial Intelligence (AI)4M
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