AQA GCSE 8525/2 OMPUTER SCIENCE PAPER 2 COMPUTING CONCEPTS+ MARK SCHEME 2025
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 Computing concepts
Tuesday 20 May 2025 Afternoon Time allowed: 1 hour 45 minutes
Materials For Examiner’s Use
There are no additional materials required for this paper.
Question Mark
You must not use a calculator.
1–2
Instructions 3–6
Use black ink or black ball-point pen. Use pencil only for drawing. 7–8
Answer all questions.
You must answer the questions in the spaces provided. 9–10
If you need extra space for your answer(s), use the lined pages at the end of 11
this book. Write the question number against your answer(s). 12–14
Do all rough work in this book. Cross through any work you do not want
15–19
to be marked.
20
Information TOTAL
The total number of marks available for this paper is 90.
Advice
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.
IB/G/Jun25/G4005/V6
, 8 5 2 5/2
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, 2
Do not write
outside the
Answer all questions. box
0 1 . 1 State the number of bits in one byte.
[1 mark]
0 1 . 2 State the number of different values that can be represented using three bits.
[1 mark]
0 1 . 3 Which number base is called binary?
Shade one lozenge.
[1 mark]
A Base 2
B Base 8
C Base 10
D Base 16
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IB/G/Jun25/8525/2
, 3
Do not write
outside the
0 2 . 1 Convert the hexadecimal number 3F into decimal. box
You should show your working.
[2 marks]
0 2 . 2 Add together the following three binary numbers.
Give your answer in binary.
[2 marks]
0 0 1 0 1 0 0 1
0 1 0 1 1 0 0 0
+0 1 0 0 1 1 0 1
7
Turn over for the next question
Turn over ►
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IB/G/Jun25/8525/2
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 Computing concepts
Tuesday 20 May 2025 Afternoon Time allowed: 1 hour 45 minutes
Materials For Examiner’s Use
There are no additional materials required for this paper.
Question Mark
You must not use a calculator.
1–2
Instructions 3–6
Use black ink or black ball-point pen. Use pencil only for drawing. 7–8
Answer all questions.
You must answer the questions in the spaces provided. 9–10
If you need extra space for your answer(s), use the lined pages at the end of 11
this book. Write the question number against your answer(s). 12–14
Do all rough work in this book. Cross through any work you do not want
15–19
to be marked.
20
Information TOTAL
The total number of marks available for this paper is 90.
Advice
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.
IB/G/Jun25/G4005/V6
, 8 5 2 5/2
for more: tyrionp ape rs.c om
, 2
Do not write
outside the
Answer all questions. box
0 1 . 1 State the number of bits in one byte.
[1 mark]
0 1 . 2 State the number of different values that can be represented using three bits.
[1 mark]
0 1 . 3 Which number base is called binary?
Shade one lozenge.
[1 mark]
A Base 2
B Base 8
C Base 10
D Base 16
for more: tyrionpapers.com
IB/G/Jun25/8525/2
, 3
Do not write
outside the
0 2 . 1 Convert the hexadecimal number 3F into decimal. box
You should show your working.
[2 marks]
0 2 . 2 Add together the following three binary numbers.
Give your answer in binary.
[2 marks]
0 0 1 0 1 0 0 1
0 1 0 1 1 0 0 0
+0 1 0 0 1 1 0 1
7
Turn over for the next question
Turn over ►
for more: tyrionpapers.com
IB/G/Jun25/8525/2
