Computer Science 9618/33 — October/November 2022
Cambridge A-Level · Advanced Theory · worked solutions for every part, with the mark scheme
Topics System Software · Data Representation · Hardware and Virtual Machines · Communication and Internet Technologies · Security · Artificial Intelligence (AI) · +2 more
Real numbers are stored in a computer system using floating-point representation with:
• 8 bits for the mantissa
• 8 bits for the exponent
• two’s complement form for both mantissa and exponent.
Write the normalised floating-point representation of +202 in this system.
Show your working.
| Mantissa | Exponent | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Working .....................................................................................................................................
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Write the normalised floating-point representation of –202 in this system.
Show your working.
| Mantissa | Exponent | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Working .....................................................................................................................................
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A binary number is stored in the computer system.
| Mantissa | Exponent | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 |
State why the number is not normalised.
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Write the normalised floating-point representation of the number.
| Mantissa | Exponent | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
The rest of this paper
11 more questions- Q2Communication and Internet Technologies5M
- Q3Data Representation8M
- Q4System Software4M
- Q5System Software3M
- Q6Security8M
- Q7Hardware and Virtual Machines7M
- Q8System Software4M
- Q9Artificial Intelligence (AI)4M
- Q10Hardware and Virtual Machines6M
- Q11Further Programming8M
- Q12Computational Thinking and Problem-solving9M