AQA GCSE COMPUTER SCIENCE Paper 2 Written Assessment June
2021
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
GCSE
COMPUTER SCIENCE
Paper 2 Written Assessment
Time allowed: 1 hour 30 minutes
Materials For Examiner’s Use
• There are no additional materials required for this paper. Question Mark
Instructions 1–3
• Use black ink or black ball-point pen. Use pencil only for drawing. 4–5
• Answer all questions. 6–9
• You must answer the questions in the spaces provided.
10
• If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s). 11
• Do all rough work in this book. Cross through any work you do not want to 12–13
be marked. 14–15
• You must not use a calculator.
16–17
Information 18–19
• The total number of marks available for this paper is 80. 20
Advice TOTAL
For the multiple-choice questions, completely fill in the lozenge alongside the appropriate answer.
CORRECT METHOD WRONG METHODS
If you want to change your answer you must cross out your original answer as shown.
If you wish to return to an answer previously crossed out, ring the answer you now wish to select as
shown.
*Jun218520201*
IB/G/Jun21/E12 8520/2
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 . 1 Convert the decimal number 220 into binary.
[1 mark]
0 1 . 2 Convert the hexadecimal number AD into binary.
You should show your working.
[2 marks]
Answer
0 1 . 3 Convert the hexadecimal number 1A into decimal.
[1 mark]
*02*
IB/G/Jun21/8520/2
, 3
Do not write
outside the
0 1 . 4 What is the largest hexadecimal number that can be represented in binary using box
8 bits?
[1 mark]
0 2 Which of the following is a reason why hexadecimal is used instead of binary?
Shade one lozenge.
[1 mark]
A Computers work in hexadecimal, not binary.
B Hexadecimal can be used to represent a wider range of numbers.
C Hexadecimal is a standard language and binary is not.
D Hexadecimal is more compact when displayed on screen.
0 3 Figure 1 shows a value represented as a bit pattern.
Figure 1
1 0 1 1 0 0 0 0
A binary shift can be used to divide the value in Figure 1 by 4.
What is the result of this shift?
Your answer must be in binary.
[1 mark]
7
Turn over ►
*03*
IB/G/Jun21/8520/2
2021
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
GCSE
COMPUTER SCIENCE
Paper 2 Written Assessment
Time allowed: 1 hour 30 minutes
Materials For Examiner’s Use
• There are no additional materials required for this paper. Question Mark
Instructions 1–3
• Use black ink or black ball-point pen. Use pencil only for drawing. 4–5
• Answer all questions. 6–9
• You must answer the questions in the spaces provided.
10
• If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s). 11
• Do all rough work in this book. Cross through any work you do not want to 12–13
be marked. 14–15
• You must not use a calculator.
16–17
Information 18–19
• The total number of marks available for this paper is 80. 20
Advice TOTAL
For the multiple-choice questions, completely fill in the lozenge alongside the appropriate answer.
CORRECT METHOD WRONG METHODS
If you want to change your answer you must cross out your original answer as shown.
If you wish to return to an answer previously crossed out, ring the answer you now wish to select as
shown.
*Jun218520201*
IB/G/Jun21/E12 8520/2
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 . 1 Convert the decimal number 220 into binary.
[1 mark]
0 1 . 2 Convert the hexadecimal number AD into binary.
You should show your working.
[2 marks]
Answer
0 1 . 3 Convert the hexadecimal number 1A into decimal.
[1 mark]
*02*
IB/G/Jun21/8520/2
, 3
Do not write
outside the
0 1 . 4 What is the largest hexadecimal number that can be represented in binary using box
8 bits?
[1 mark]
0 2 Which of the following is a reason why hexadecimal is used instead of binary?
Shade one lozenge.
[1 mark]
A Computers work in hexadecimal, not binary.
B Hexadecimal can be used to represent a wider range of numbers.
C Hexadecimal is a standard language and binary is not.
D Hexadecimal is more compact when displayed on screen.
0 3 Figure 1 shows a value represented as a bit pattern.
Figure 1
1 0 1 1 0 0 0 0
A binary shift can be used to divide the value in Figure 1 by 4.
What is the result of this shift?
Your answer must be in binary.
[1 mark]
7
Turn over ►
*03*
IB/G/Jun21/8520/2
