2025 OCR2025
AS Level
OCR2025
Computer
AS Level
OCRComputer
Science
AS LevelH04601
Computer
Science
Computing
H04601
Science
Computing
principles
H04601 Computing
Verified
principles
Question
Verified
principles
paper
Question
Verified
withpaper
Marking
Question
with
Scheme
paper
Marking
with
Attached.pdf
Scheme
MarkingAttached.pdf
Scheme Attached.pdf
2025 OCR AS Level Computer Science
H046/01 Computing principles
Verified Question paper with Marking Scheme Attached
Oxford Cambridge and RSA
Tuesday 13 May 2025 – Afternoon
AS Level Computer Science
H046/01 Computing principles
Time allowed: 1 hour 15 minutes
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.
• Write your answer to each question in the space provided. You can use extra paper if you
need to, but you must clearly show your candidate number, the centre number and the
question numbers.
• Answer all the questions.
INFORMATION
• The total mark for this paper is 70.
• 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 16 pages.
ADVICE
• Read each question carefully before you start your answe
© OCR 2025 [601/5030/0] OCR is an exempt Charity
DC (PQ/CGW) 324947/5 Turn over
2025 OCR2025
AS Level
OCR2025
Computer
AS Level
OCRComputer
Science
AS LevelH04601
Computer
Science
Computing
H04601
Science
Computing
principles
H04601 Computing
Verified
principles
Question
Verified
principles
paper
Question
Verified
withpaper
Marking
Question
with
Scheme
paper
Marking
with
Attached.pdf
Scheme
MarkingAttached.pdf
Scheme Attached.pdf
,2025 OCR2025
AS Level
OCR2025
Computer
AS Level
OCRComputer
Science
AS LevelH04601
Computer
Science
Computing
H04601
Science
Computing
principles
H04601 Computing
Verified
principles
Question
Verified
principles
paper
Question
Verified
withpaper
Marking
Question
with
Scheme
paper
Marking
with
Attached.pdf
Scheme
MarkingAttached.pdf
Scheme Attached.pdf
2
BLANK PAGE
DO NOT WRITE ON THIS PAGE
© OCR 2025
2025 OCR2025
AS Level
OCR2025
Computer
AS Level
OCRComputer
Science
AS LevelH04601
Computer
Science
Computing
H04601
Science
Computing
principles
H04601 Computing
Verified
principles
Question
Verified
principles
paper
Question
Verified
withpaper
Marking
Question
with
Scheme
paper
Marking
with
Attached.pdf
Scheme
MarkingAttached.pdf
Scheme Attached.pdf
,2025 OCR2025
AS Level
OCR2025
Computer
AS Level
OCRComputer
Science
AS LevelH04601
Computer
Science
Computing
H04601
Science
Computing
principles
H04601 Computing
Verified
principles
Question
Verified
principles
paper
Question
Verified
withpaper
Marking
Question
with
Scheme
paper
Marking
with
Attached.pdf
Scheme
MarkingAttached.pdf
Scheme Attached.pdf
3
1 The table shows the steps of the Fetch stage only of the Fetch-Decode-Execute cycle. The names of
the registers are referred to as A, B, C and D.
1 The contents of the Register A are copied into the Register B.
2a RAM is read at the location specified by the Register B and its contents are copied into the
Register C.
2b Register A is incremented by 1.
3 The contents of the Register C are copied into the Register D.
(a) State the name of each register in the table.
Register A
Register B
Register C
Register D
[4]
(b) Describe how the performance of the Fetch-Decode-Execute cycle changes when increasing:
(i) The number of cores
..........................................................................................................................................................
. .................................................................................................................................................................... [1]
(ii) The clock speed
..........................................................................................................................................................
. .................................................................................................................................................................... [1]
© OCR 2025 Turn over
2025 OCR2025
AS Level
OCR2025
Computer
AS Level
OCRComputer
Science
AS LevelH04601
Computer
Science
Computing
H04601
Science
Computing
principles
H04601 Computing
Verified
principles
Question
Verified
principles
paper
Question
Verified
withpaper
Marking
Question
with
Scheme
paper
Marking
with
Attached.pdf
Scheme
MarkingAttached.pdf
Scheme Attached.pdf
, 2025 OCR2025
AS Level
OCR2025
Computer
AS Level
OCRComputer
Science
AS LevelH04601
Computer
Science
Computing
H04601
Science
Computing
principles
H04601 Computing
Verified
principles
Question
Verified
principles
paper
Question
Verified
withpaper
Marking
Question
with
Scheme
paper
Marking
with
Attached.pdf
Scheme
MarkingAttached.pdf
Scheme Attached.pdf
4
2* OCR Accountants is a firm of 30 employees. Each employee handles financial matters for many local
businesses.
The organisation runs a single large server which hosts their email, website and files about businesses they
work with.
Discuss the different functions of an operating system and why they are essential to the management of
this single server.
You should refer to the following in your answer:
• the different functions of an operating system
• how these functions can be used to manage the OCR Accountants’ server and why they are
essential?
[9]
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
© OCR 2025
2025 OCR2025
AS Level
OCR2025
Computer
AS Level
OCRComputer
Science
AS LevelH04601
Computer
Science
Computing
H04601
Science
Computing
principles
H04601 Computing
Verified
principles
Question
Verified
principles
paper
Question
Verified
withpaper
Marking
Question
with
Scheme
paper
Marking
with
Attached.pdf
Scheme
MarkingAttached.pdf
Scheme Attached.pdf
AS Level
OCR2025
Computer
AS Level
OCRComputer
Science
AS LevelH04601
Computer
Science
Computing
H04601
Science
Computing
principles
H04601 Computing
Verified
principles
Question
Verified
principles
paper
Question
Verified
withpaper
Marking
Question
with
Scheme
paper
Marking
with
Attached.pdf
Scheme
MarkingAttached.pdf
Scheme Attached.pdf
2025 OCR AS Level Computer Science
H046/01 Computing principles
Verified Question paper with Marking Scheme Attached
Oxford Cambridge and RSA
Tuesday 13 May 2025 – Afternoon
AS Level Computer Science
H046/01 Computing principles
Time allowed: 1 hour 15 minutes
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.
• Write your answer to each question in the space provided. You can use extra paper if you
need to, but you must clearly show your candidate number, the centre number and the
question numbers.
• Answer all the questions.
INFORMATION
• The total mark for this paper is 70.
• 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 16 pages.
ADVICE
• Read each question carefully before you start your answe
© OCR 2025 [601/5030/0] OCR is an exempt Charity
DC (PQ/CGW) 324947/5 Turn over
2025 OCR2025
AS Level
OCR2025
Computer
AS Level
OCRComputer
Science
AS LevelH04601
Computer
Science
Computing
H04601
Science
Computing
principles
H04601 Computing
Verified
principles
Question
Verified
principles
paper
Question
Verified
withpaper
Marking
Question
with
Scheme
paper
Marking
with
Attached.pdf
Scheme
MarkingAttached.pdf
Scheme Attached.pdf
,2025 OCR2025
AS Level
OCR2025
Computer
AS Level
OCRComputer
Science
AS LevelH04601
Computer
Science
Computing
H04601
Science
Computing
principles
H04601 Computing
Verified
principles
Question
Verified
principles
paper
Question
Verified
withpaper
Marking
Question
with
Scheme
paper
Marking
with
Attached.pdf
Scheme
MarkingAttached.pdf
Scheme Attached.pdf
2
BLANK PAGE
DO NOT WRITE ON THIS PAGE
© OCR 2025
2025 OCR2025
AS Level
OCR2025
Computer
AS Level
OCRComputer
Science
AS LevelH04601
Computer
Science
Computing
H04601
Science
Computing
principles
H04601 Computing
Verified
principles
Question
Verified
principles
paper
Question
Verified
withpaper
Marking
Question
with
Scheme
paper
Marking
with
Attached.pdf
Scheme
MarkingAttached.pdf
Scheme Attached.pdf
,2025 OCR2025
AS Level
OCR2025
Computer
AS Level
OCRComputer
Science
AS LevelH04601
Computer
Science
Computing
H04601
Science
Computing
principles
H04601 Computing
Verified
principles
Question
Verified
principles
paper
Question
Verified
withpaper
Marking
Question
with
Scheme
paper
Marking
with
Attached.pdf
Scheme
MarkingAttached.pdf
Scheme Attached.pdf
3
1 The table shows the steps of the Fetch stage only of the Fetch-Decode-Execute cycle. The names of
the registers are referred to as A, B, C and D.
1 The contents of the Register A are copied into the Register B.
2a RAM is read at the location specified by the Register B and its contents are copied into the
Register C.
2b Register A is incremented by 1.
3 The contents of the Register C are copied into the Register D.
(a) State the name of each register in the table.
Register A
Register B
Register C
Register D
[4]
(b) Describe how the performance of the Fetch-Decode-Execute cycle changes when increasing:
(i) The number of cores
..........................................................................................................................................................
. .................................................................................................................................................................... [1]
(ii) The clock speed
..........................................................................................................................................................
. .................................................................................................................................................................... [1]
© OCR 2025 Turn over
2025 OCR2025
AS Level
OCR2025
Computer
AS Level
OCRComputer
Science
AS LevelH04601
Computer
Science
Computing
H04601
Science
Computing
principles
H04601 Computing
Verified
principles
Question
Verified
principles
paper
Question
Verified
withpaper
Marking
Question
with
Scheme
paper
Marking
with
Attached.pdf
Scheme
MarkingAttached.pdf
Scheme Attached.pdf
, 2025 OCR2025
AS Level
OCR2025
Computer
AS Level
OCRComputer
Science
AS LevelH04601
Computer
Science
Computing
H04601
Science
Computing
principles
H04601 Computing
Verified
principles
Question
Verified
principles
paper
Question
Verified
withpaper
Marking
Question
with
Scheme
paper
Marking
with
Attached.pdf
Scheme
MarkingAttached.pdf
Scheme Attached.pdf
4
2* OCR Accountants is a firm of 30 employees. Each employee handles financial matters for many local
businesses.
The organisation runs a single large server which hosts their email, website and files about businesses they
work with.
Discuss the different functions of an operating system and why they are essential to the management of
this single server.
You should refer to the following in your answer:
• the different functions of an operating system
• how these functions can be used to manage the OCR Accountants’ server and why they are
essential?
[9]
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
© OCR 2025
2025 OCR2025
AS Level
OCR2025
Computer
AS Level
OCRComputer
Science
AS LevelH04601
Computer
Science
Computing
H04601
Science
Computing
principles
H04601 Computing
Verified
principles
Question
Verified
principles
paper
Question
Verified
withpaper
Marking
Question
with
Scheme
paper
Marking
with
Attached.pdf
Scheme
MarkingAttached.pdf
Scheme Attached.pdf
