the 2025UK.STUDIES//2O25
OCR A/AS Level question
OCR Apaper,
Level including
Computerthe
Science
complete
H44601
Question
Computer
Papersystems
with Exam-Ready
Verified Question
Examinerpaper
Markwith
Scheme.
Marking
Covers
Scheme
all examinable
combined.pdf
Page
content
1 of 65
with Verifie
2O25 OCR A Level Computer Science
H446/01 Computer systems
Verified Question paper with Marking
Scheme combined
INSTRUCTIONS
• Use black ink. You can use an HB pencil,
but only for graphs and diagrams.
• Write your answer to each question in
the space provided. If you need extra space use
the lined pages at the end of this booklet. The
question numbers must be clearly shown.
• Answer all the questions.
INFORMATION
• The total mark for this paper is 140.
• The marks for each question are shown
OCR A LEVEL in brackets [ ].
• Quality of extended response will be
COMPUTER assessed in questions marked with an asterisk
(*).
• This document has 32 pages.
SCIENCE ADVICE
• Read each question carefully before you
start your answer.
S Level question
Downloadpaper,
the 2025
including
OCRthe
A/AS
complete
Level question
Questionpaper,
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with Exam-Ready
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Page
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,the 2025UK.STUDIES//2O25
OCR A/AS Level question
OCR Apaper,
Level including
Computerthe
Science
complete
H44601
Question
Computer
Papersystems
with Exam-Ready
Verified Question
Examinerpaper
Markwith
Scheme.
Marking
Covers
Scheme
all examinable
combined.pdf
Page
content
2 of 65
with Verifie
Oxford Cambridge and RSA
Wednesday 11 June 2025 – Morning
A Level Computer Science
H446/01 Computer systems
Time allowed: 2 hours 30 minutes
You can use:
• a ruler (cm/mm)
• an HB pencil
Do not use:
• a calculator*
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use the lined
pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
INFORMATION
• The total mark for this paper is 140.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 32 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2025 [601/4911/5] OCR is an exempt Charity
DC (PQ/CB) 340531/5 Turn over
S Level question
Downloadpaper,
the 2025
including
OCRthe
A/AS
complete
Level question
Questionpaper,
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the complete
Page
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Question
65 Mark
Paper
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with Exam-Ready
Covers all examinable
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with Verified
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all examinable
,the 2025UK.STUDIES//2O25
OCR A/AS Level question
OCR Apaper,
Level including
Computerthe
Science
complete
H44601
Question
Computer
Papersystems
with Exam-Ready
Verified Question
Examinerpaper
Markwith
Scheme.
Marking
Covers
Scheme
all examinable
combined.pdf
Page
content
3 of 65
with Verifie
2
BLANK PAGE
DO NOT WRITE ON THIS PAGE
© OCR 2025
S Level question
Downloadpaper,
the 2025
including
OCRthe
A/AS
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Level question
Questionpaper,
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with Exam-Ready
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Page
Examiner
3 of
Question
65 Mark
Paper
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with Exam-Ready
Covers all examinable
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,the 2025UK.STUDIES//2O25
OCR A/AS Level question
OCR Apaper,
Level including
Computerthe
Science
complete
H44601
Question
Computer
Papersystems
with Exam-Ready
Verified Question
Examinerpaper
Markwith
Scheme.
Marking
Covers
Scheme
all examinable
combined.pdf
Page
content
4 of 65
with Verifie
3
1 Charlie is about to study a computer games design course at university. He needs to purchase a
computer to allow him to design and edit the graphics in his games, including video files.
(a) Charlie’s computer contains a data bus, an address bus and a control bus. State
the purpose of each of these three buses.
Data bus ...........................................................................................................................................
..........................................................................................................................................................
Address bus .....................................................................................................................................
..........................................................................................................................................................
Control bus .......................................................................................................................................
..........................................................................................................................................................
[3]
(b) Charlie will need to use input and output devices when designing and editing his computer games.
(i) State one input device and one output device that Charlie could use and give an example use of each.
Input device
Device name ....................................................................................................................................
..........................................................................................................................................................
Example use ....................................................................................................................................
..........................................................................................................................................................
Output device
Device name .....................................................................................................................................
..........................................................................................................................................................
Example use .....................................................................................................................................
..........................................................................................................................................................
[4]
© OCR 2025 Turn over
S Level question
Downloadpaper,
the 2025
including
OCRthe
A/AS
complete
Level question
Questionpaper,
Paper including
with Exam-Ready
the complete
Page
Examiner
4 of
Question
65 Mark
Paper
Scheme.
with Exam-Ready
Covers all examinable
Examinercontent
Mark Scheme.
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all examinable
OCR A/AS Level question
OCR Apaper,
Level including
Computerthe
Science
complete
H44601
Question
Computer
Papersystems
with Exam-Ready
Verified Question
Examinerpaper
Markwith
Scheme.
Marking
Covers
Scheme
all examinable
combined.pdf
Page
content
1 of 65
with Verifie
2O25 OCR A Level Computer Science
H446/01 Computer systems
Verified Question paper with Marking
Scheme combined
INSTRUCTIONS
• Use black ink. You can use an HB pencil,
but only for graphs and diagrams.
• Write your answer to each question in
the space provided. If you need extra space use
the lined pages at the end of this booklet. The
question numbers must be clearly shown.
• Answer all the questions.
INFORMATION
• The total mark for this paper is 140.
• The marks for each question are shown
OCR A LEVEL in brackets [ ].
• Quality of extended response will be
COMPUTER assessed in questions marked with an asterisk
(*).
• This document has 32 pages.
SCIENCE ADVICE
• Read each question carefully before you
start your answer.
S Level question
Downloadpaper,
the 2025
including
OCRthe
A/AS
complete
Level question
Questionpaper,
Paper including
with Exam-Ready
the complete
Page
Examiner
1 of
Question
65 Mark
Paper
Scheme.
with Exam-Ready
Covers all examinable
Examinercontent
Mark Scheme.
with Verified
CoversAnswers
all examinable
,the 2025UK.STUDIES//2O25
OCR A/AS Level question
OCR Apaper,
Level including
Computerthe
Science
complete
H44601
Question
Computer
Papersystems
with Exam-Ready
Verified Question
Examinerpaper
Markwith
Scheme.
Marking
Covers
Scheme
all examinable
combined.pdf
Page
content
2 of 65
with Verifie
Oxford Cambridge and RSA
Wednesday 11 June 2025 – Morning
A Level Computer Science
H446/01 Computer systems
Time allowed: 2 hours 30 minutes
You can use:
• a ruler (cm/mm)
• an HB pencil
Do not use:
• a calculator*
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use the lined
pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
INFORMATION
• The total mark for this paper is 140.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 32 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2025 [601/4911/5] OCR is an exempt Charity
DC (PQ/CB) 340531/5 Turn over
S Level question
Downloadpaper,
the 2025
including
OCRthe
A/AS
complete
Level question
Questionpaper,
Paper including
with Exam-Ready
the complete
Page
Examiner
2 of
Question
65 Mark
Paper
Scheme.
with Exam-Ready
Covers all examinable
Examinercontent
Mark Scheme.
with Verified
CoversAnswers
all examinable
,the 2025UK.STUDIES//2O25
OCR A/AS Level question
OCR Apaper,
Level including
Computerthe
Science
complete
H44601
Question
Computer
Papersystems
with Exam-Ready
Verified Question
Examinerpaper
Markwith
Scheme.
Marking
Covers
Scheme
all examinable
combined.pdf
Page
content
3 of 65
with Verifie
2
BLANK PAGE
DO NOT WRITE ON THIS PAGE
© OCR 2025
S Level question
Downloadpaper,
the 2025
including
OCRthe
A/AS
complete
Level question
Questionpaper,
Paper including
with Exam-Ready
the complete
Page
Examiner
3 of
Question
65 Mark
Paper
Scheme.
with Exam-Ready
Covers all examinable
Examinercontent
Mark Scheme.
with Verified
CoversAnswers
all examinable
,the 2025UK.STUDIES//2O25
OCR A/AS Level question
OCR Apaper,
Level including
Computerthe
Science
complete
H44601
Question
Computer
Papersystems
with Exam-Ready
Verified Question
Examinerpaper
Markwith
Scheme.
Marking
Covers
Scheme
all examinable
combined.pdf
Page
content
4 of 65
with Verifie
3
1 Charlie is about to study a computer games design course at university. He needs to purchase a
computer to allow him to design and edit the graphics in his games, including video files.
(a) Charlie’s computer contains a data bus, an address bus and a control bus. State
the purpose of each of these three buses.
Data bus ...........................................................................................................................................
..........................................................................................................................................................
Address bus .....................................................................................................................................
..........................................................................................................................................................
Control bus .......................................................................................................................................
..........................................................................................................................................................
[3]
(b) Charlie will need to use input and output devices when designing and editing his computer games.
(i) State one input device and one output device that Charlie could use and give an example use of each.
Input device
Device name ....................................................................................................................................
..........................................................................................................................................................
Example use ....................................................................................................................................
..........................................................................................................................................................
Output device
Device name .....................................................................................................................................
..........................................................................................................................................................
Example use .....................................................................................................................................
..........................................................................................................................................................
[4]
© OCR 2025 Turn over
S Level question
Downloadpaper,
the 2025
including
OCRthe
A/AS
complete
Level question
Questionpaper,
Paper including
with Exam-Ready
the complete
Page
Examiner
4 of
Question
65 Mark
Paper
Scheme.
with Exam-Ready
Covers all examinable
Examinercontent
Mark Scheme.
with Verified
CoversAnswers
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