WJEC GCSE Computer Science 3500/1 Paper 1 Understanding Computer Science - Summer 2025
3500/1 路 Mark scheme, Question paper
WJEC
GCSE
Computer Science
WJEC GCSE Computer Science past papers
This collection keeps WJEC Computer Science papers together so you can revise the right exam-board style and jump to related revision modules when they are available.
馃搫 24 papers
2019-2025
How the exam works
Skip to the papersWJEC GCSE in Computer Science (Wales) (3500QS) is assessed in 3 parts. There are no tiers: everyone sits the same papers.
Unit 1: Understanding Computer Science
- Time
- 1 h 45 min
- Marks
- 100
- Weighting
- 50%
- Format
- Written exam
Unit 2: Computational Thinking and Programming
- Time
- 2 h
- Marks
- 60
- Weighting
- 30%
- Format
- On-screen exam
Unit 3: Software Development
- Marks
- 80
- Weighting
- 20%
- Format
- Non-exam assessment (~20 hours)
Taken from the published specification. Read the specification. Your school confirms which papers and tier you are entered for.
2025 Summer
WJEC GCSE Computer Science 3500/2 Paper 2 - Summer 2025
3500/2 路 Mark scheme, Question paper
2024 Summer
WJEC GCSE Computer Science 3500/1 Paper 1 Understanding Computer Science - Summer 2024
3500/1 路 Mark scheme, Question paper
WJEC GCSE Computer Science 3500/2 Paper 2 - Summer 2024
3500/2 路 Mark scheme, Question paper
WJEC GCSE Computer Science 3500/3 Paper 3 - Summer 2024
3500/3 路 Question paper
2023 Summer
WJEC GCSE Computer Science 3500/1 Paper 1 Understanding Computer Science - Summer 2023
3500/1 路 Mark scheme, Question paper
WJEC GCSE Computer Science 3500/2 Paper 2 - Summer 2023
3500/2 路 Mark scheme, Question paper
WJEC GCSE Computer Science 3500/3 Paper 3 - Summer 2023
3500/3 路 Question paper
2022 Summer
WJEC GCSE Computer Science 3500/1 Paper 1 Understanding Computer Science - Summer 2022
3500/1 路 Mark scheme, Question paper
WJEC GCSE Computer Science 3500/2 Paper 2 - Summer 2022
3500/2 路 Mark scheme, Question paper
WJEC GCSE Computer Science 3500/3 Paper 3 - Summer 2022
3500/3 路 Question paper
2019 Summer
WJEC GCSE Computer Science 3500/1 Paper 1 Understanding Computer Science - Summer 2019
3500/1 路 Mark scheme, Question paper
WJEC GCSE Computer Science 3500/2 Paper 2 - Summer 2019
3500/2 路 Mark scheme, Question paper
WJEC GCSE Computer Science 3500/3 Paper 3 - Summer 2019
3500/3 路 Question paper
How to use these papers
Before you start. Work it with the formula sheet you will actually get in the exam, and nothing else. Finding out which formulas you have to remember is half the point of the exercise.
While you work. Write every line of working, even the ones you could do in your head. Method marks are awarded for the working, and a bare answer that is wrong scores nothing.
Marking it afterwards. Mark schemes here award marks per step, so tick your own working line by line rather than judging the final answer. Most lost marks turn out to be a missing unit or an unrounded value.
Warm up first. Data Representation is the shortest activity here, so it is the quickest way back into Computer Science before you open a paper.
Revise this subject
Data Representation
Data representation and data types (Unit 1)
Hardware, Operating Systems and Architecture
Hardware, operating systems and architecture (Unit 1)
Impacts of Digital Technology on Society
Impacts of digital technology on society (Unit 1)
Inside the Machine
Computer architecture (Unit 1)
Logic, Networks and Security
Logic, communication, networks and security (Unit 1)
Storage Showdown
Computer architecture (Unit 1)
The Development Life Cycle
Systems development life cycle (Unit 1)
Same subject and level, other exam boards
Schools enter the same subject with different boards, and the papers are not interchangeable. Check the code on your own paper before you revise from these.
Common questions
Are these WJEC GCSE Computer Science past papers free?
Yes. DoRevision links to official exam-board documents and keeps the revision page free to browse.
Can I use these for Year 10 and Year 11 mocks?
Yes. Past papers are useful for GCSE mocks, timed practice and checking answers against the mark scheme.