AQA AS COMPUTER SCIENCE PAPER 2 QP MAY 2025
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
COMPUTER SCIENCE
Paper 2
Monday 19 May 2025 Afternoon Time allowed: 1 hour 30 minutes
Materials
For this paper you must have: For Examiner’s Use
a calculator.
Question Mark
Instructions 1
Use black ink or black ball-point pen. 2
Fill in the boxes at the top of this page. 3
Answer all questions.
You must answer the questions in the spaces provided. Do not 4
write outside the box around each page or on blank pages. 5
If you need extra space for your answer(s), use the lined pages at 6
the end of this book. Write the question number against your
7
answer(s).
Do all rough work in this book. Cross through any work you do 8
not want to be marked. 9
10
Information
The marks for questions are shown in brackets. 11
The maximum mark for this paper is 75. 12
13
Advice
In some questions you are required to indicate your answer by completelyTOTAL
shading a lozenge alongside the appropriate answer as shown.
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.
for more:
IB/G/Jun25/G4002/E11
,tyrionp ape rs.c om
7 5 1 6/2
, 2
Do not
write
Answer all questions in the spaces outside
box the
provided.
0 1 .1
Which two of the numbers below belong to the set of numbers represented by ℤ?
Shade two lozenges.
[2 marks]
A 0
B √2
C π
3
D
4
E 998
.
0 1 2 Describe what is meant by the term ‘ordinal
number’. [1 mark]
0 1 .3 Explain why real numbers are better suited to representing measurements
of some quantities than natural numbers.
[1 mark]
4
for more: tyrionpapers.com
IB/G/
Jun25/7516/2
, 3
Do not
write
0 2 .1 How many different values can be represented using
outside
box the
one byte? [1 mark]
0 2 . The bit pattern in Figure 1 represents an 8-bit unsigned binary
2 integer.
Figure 1
0 1 0 0 0 0 1 1
Convert the bit pattern in Figure 1 to decimal. [1 mark]
0 2 .3 Show how the 8-bit unsigned binary number 01001111 can be added to
the 8-bit unsigned binary number 00001011 without converting the
numbers into decimal.
You must show all your working in binary.
[2 marks]
0 1 0 0 1 1 1 1
+ 0 0 0 0 1 0 1 1
for more: tyrionpapers.com
IB/G/
Jun25/7516/2
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
COMPUTER SCIENCE
Paper 2
Monday 19 May 2025 Afternoon Time allowed: 1 hour 30 minutes
Materials
For this paper you must have: For Examiner’s Use
a calculator.
Question Mark
Instructions 1
Use black ink or black ball-point pen. 2
Fill in the boxes at the top of this page. 3
Answer all questions.
You must answer the questions in the spaces provided. Do not 4
write outside the box around each page or on blank pages. 5
If you need extra space for your answer(s), use the lined pages at 6
the end of this book. Write the question number against your
7
answer(s).
Do all rough work in this book. Cross through any work you do 8
not want to be marked. 9
10
Information
The marks for questions are shown in brackets. 11
The maximum mark for this paper is 75. 12
13
Advice
In some questions you are required to indicate your answer by completelyTOTAL
shading a lozenge alongside the appropriate answer as shown.
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.
for more:
IB/G/Jun25/G4002/E11
,tyrionp ape rs.c om
7 5 1 6/2
, 2
Do not
write
Answer all questions in the spaces outside
box the
provided.
0 1 .1
Which two of the numbers below belong to the set of numbers represented by ℤ?
Shade two lozenges.
[2 marks]
A 0
B √2
C π
3
D
4
E 998
.
0 1 2 Describe what is meant by the term ‘ordinal
number’. [1 mark]
0 1 .3 Explain why real numbers are better suited to representing measurements
of some quantities than natural numbers.
[1 mark]
4
for more: tyrionpapers.com
IB/G/
Jun25/7516/2
, 3
Do not
write
0 2 .1 How many different values can be represented using
outside
box the
one byte? [1 mark]
0 2 . The bit pattern in Figure 1 represents an 8-bit unsigned binary
2 integer.
Figure 1
0 1 0 0 0 0 1 1
Convert the bit pattern in Figure 1 to decimal. [1 mark]
0 2 .3 Show how the 8-bit unsigned binary number 01001111 can be added to
the 8-bit unsigned binary number 00001011 without converting the
numbers into decimal.
You must show all your working in binary.
[2 marks]
0 1 0 0 1 1 1 1
+ 0 0 0 0 1 0 1 1
for more: tyrionpapers.com
IB/G/
Jun25/7516/2
