Use pastpapers like this to help you revise
Understand exam format and structure
Past papers show the types of questions, mark allocations, and time limits,
helping students know what to expect in the real exam.
Identify frequently tested topics
By reviewing several past papers, students can spot patterns and common
themes that appear regularly.
Practice time management
Completing past papers under timed conditions helps students learn how
to pace themselves during the exam.
Improve exam technique
Students learn how to interpret command words (e.g. explain, compare,
evaluate) and structure answers effectively.
Assess strengths and weaknesses
Marking answers using mark schemes highlights areas that need more
revision.
Build confidence
Familiarity with exam-style questions reduces anxiety and increases
confidence going into the exam.
Improve accuracy and clarity
Repeated practice helps students write clearer, more precise answers and
avoid common mistakes.
Track progress over time
Comparing results from different past papers shows improvement and
helps students adjust revision strategies.
TYRIONPAPERS.COM
, Oxford Cambridge and RSA
Tuesday 20 May 2025 – Afternoon
GCSE (9–1) Computer Science
J277/02 Computational thinking, algorithms and programming
Time allowed: 1 hour 30 minutes
Do not use:
* 1 8 6 0 3 9 6 2 5 3 *
• a calculator
* J 2 7 7 0 2 *
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. 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 80.
• The marks for each question are shown in brackets [ ].
• This document has 20 pages.
ADVICE
• Read each question carefully before you start your answer.
• We advise you to spend approximately 50 minutes on Section A and approximately
40 minutes on Section B.
© OCR 2025 [601/8355/X] OCR is an exempt Charity
DC (WW/JG) 355817/3 Turn over
for more: tyrionpapers.com
, 2
Section A
We advise you to spend approximately 50 minutes on Section A.
1 A program asks a user to enter a number. Only integer values between 1 and 100 (inclusive) are
accepted. The program is tested.
(a) Tick (✓) one or more boxes in each row to identify the type or types of test for each example of
test data.
Invalid /
Example Normal Boundary
erroneous
test data test data test data
test data
27
"Hello"
105
100
[4]
(b) An algorithm is written for the program.
(i) Complete the algorithm for the program.
num = input("Enter a number between 1 and 100")
if num ........................................ AND ........................................ then
print("accepted")
........................................
print("not accepted")
endif
[3]
(ii) Give the identifier of one variable used in the algorithm in part (b)(i).
..................................................................................................................................................... [1]
(iii) Give one Boolean operator used in the algorithm in part (b)(i).
..................................................................................................................................................... [1]
© OCR 2025
for more: tyrionpapers.com
Understand exam format and structure
Past papers show the types of questions, mark allocations, and time limits,
helping students know what to expect in the real exam.
Identify frequently tested topics
By reviewing several past papers, students can spot patterns and common
themes that appear regularly.
Practice time management
Completing past papers under timed conditions helps students learn how
to pace themselves during the exam.
Improve exam technique
Students learn how to interpret command words (e.g. explain, compare,
evaluate) and structure answers effectively.
Assess strengths and weaknesses
Marking answers using mark schemes highlights areas that need more
revision.
Build confidence
Familiarity with exam-style questions reduces anxiety and increases
confidence going into the exam.
Improve accuracy and clarity
Repeated practice helps students write clearer, more precise answers and
avoid common mistakes.
Track progress over time
Comparing results from different past papers shows improvement and
helps students adjust revision strategies.
TYRIONPAPERS.COM
, Oxford Cambridge and RSA
Tuesday 20 May 2025 – Afternoon
GCSE (9–1) Computer Science
J277/02 Computational thinking, algorithms and programming
Time allowed: 1 hour 30 minutes
Do not use:
* 1 8 6 0 3 9 6 2 5 3 *
• a calculator
* J 2 7 7 0 2 *
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. 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 80.
• The marks for each question are shown in brackets [ ].
• This document has 20 pages.
ADVICE
• Read each question carefully before you start your answer.
• We advise you to spend approximately 50 minutes on Section A and approximately
40 minutes on Section B.
© OCR 2025 [601/8355/X] OCR is an exempt Charity
DC (WW/JG) 355817/3 Turn over
for more: tyrionpapers.com
, 2
Section A
We advise you to spend approximately 50 minutes on Section A.
1 A program asks a user to enter a number. Only integer values between 1 and 100 (inclusive) are
accepted. The program is tested.
(a) Tick (✓) one or more boxes in each row to identify the type or types of test for each example of
test data.
Invalid /
Example Normal Boundary
erroneous
test data test data test data
test data
27
"Hello"
105
100
[4]
(b) An algorithm is written for the program.
(i) Complete the algorithm for the program.
num = input("Enter a number between 1 and 100")
if num ........................................ AND ........................................ then
print("accepted")
........................................
print("not accepted")
endif
[3]
(ii) Give the identifier of one variable used in the algorithm in part (b)(i).
..................................................................................................................................................... [1]
(iii) Give one Boolean operator used in the algorithm in part (b)(i).
..................................................................................................................................................... [1]
© OCR 2025
for more: tyrionpapers.com
