• COMPUTER SCIENCE
• Paper 2 Computing concepts Merged with mark scheme
• Please write clearly in block capitals.
• Centre number
• Surname
•
• Forename(s)
•
• Candidate signature
•
• I declare this is my own work. Candida
GCSE
te
number
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
• Use black ink or black ball-point pen. Use pencil only for drawing. 3–6
• Answer all questions.
• You must answer the questions in the spaces provided.
7–8
• 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).
• Do all rough work in this book. Cross through any work you do not want to be 9–10
marked.
11
Information
The total number of marks available for this paper is 90. 12–14
Advice
15–19
20
*jun258525201* 8525/2
IB/G/Jun25/G4005/V6 TOTAL
For the multiple-choice questions, completelyAnswer
fill in thealllozenge alongside the appropriate answer.
questions.
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
for more: tyrionpapers.com
, 2
Do not write
outside the
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
*02*
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IB/G/Jun25/8525/2
, 3
Do not write outside the
box
Turn over ►
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IB/G/Jun25/8525/2
0 2 . 1 Convert the hexadecimal number 3F into decimal .
, You should show your working.
[2 marks ]
4
Do not write
outside the
box
*03*
0 2 . 2 Add together the following three binary numbers.
Give your answer in binary.
[2 marks ]
0010 1 0 0 1
01011 0 0 0
+ 01001 1 0 1
Turn over for the next question
for more: tyrionpapers.com
IB/G/Jun25/8525/2
• Paper 2 Computing concepts Merged with mark scheme
• Please write clearly in block capitals.
• Centre number
• Surname
•
• Forename(s)
•
• Candidate signature
•
• I declare this is my own work. Candida
GCSE
te
number
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
• Use black ink or black ball-point pen. Use pencil only for drawing. 3–6
• Answer all questions.
• You must answer the questions in the spaces provided.
7–8
• 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).
• Do all rough work in this book. Cross through any work you do not want to be 9–10
marked.
11
Information
The total number of marks available for this paper is 90. 12–14
Advice
15–19
20
*jun258525201* 8525/2
IB/G/Jun25/G4005/V6 TOTAL
For the multiple-choice questions, completelyAnswer
fill in thealllozenge alongside the appropriate answer.
questions.
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
for more: tyrionpapers.com
, 2
Do not write
outside the
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
*02*
for more: tyrionpapers.com
IB/G/Jun25/8525/2
, 3
Do not write outside the
box
Turn over ►
for more: tyrionpapers.com
IB/G/Jun25/8525/2
0 2 . 1 Convert the hexadecimal number 3F into decimal .
, You should show your working.
[2 marks ]
4
Do not write
outside the
box
*03*
0 2 . 2 Add together the following three binary numbers.
Give your answer in binary.
[2 marks ]
0010 1 0 0 1
01011 0 0 0
+ 01001 1 0 1
Turn over for the next question
for more: tyrionpapers.com
IB/G/Jun25/8525/2
