specification overview
Edexcel GCSE (9-1) Computer Science (1CP2) is a single-tier linear qualification with two papers. Paper 1 (Principles of Computer Science) is 1h 30m and 75 marks (50%); Paper 2 (Application of Computational Thinking) is 2h onscreen with a Python code editor and 75 marks (50%).
subject content
1. Computational thinking
Paper 1- Decomposition, abstraction, algorithmic thinking
- Applying computational thinking to solve problems
2. Data
Paper 1- Binary, denary, hexadecimal conversion; binary arithmetic
- Character sets (ASCII, Unicode), images, sound, compression
3. Computers
Paper 1- Hardware and software; CPU architecture, memory, storage
- Operating systems and utility software
4. Networks
Paper 1- LANs, WANs, network topologies
- Protocols and layers (TCP/IP)
5. Issues and impact
Paper 1- Ethical, legal, cultural and environmental impacts
- Cyber security threats and mitigations, privacy
6. Problem solving with programming
Paper 2- Python 3: variables, data types, selection, iteration, subroutines
- Arrays (lists), string handling, file I/O
- Testing and debugging, error diagnosis
assessment structure
| Paper | What's assessed | Length | Marks | Weight | Question types |
|---|---|---|---|---|---|
| Paper 1 (Principles of Computer Science) | Computational thinking, data, computers, networks, issues and impact | 1h 30m | 75 | 50% | Short-answer and extended-response questions on theory |
| Paper 2 (Application of Computational Thinking) | Problem solving with programming (Python 3) | 2h | 75 | 50% | Onscreen exam with Python code editor. Multiple tasks writing, reading and debugging Python code |
Paper 2 is Edexcel's distinctive onscreen exam where students write actual Python code in an editor and submit runnable solutions. Practise using an IDE similar to the exam environment before sitting.
assessment objectives
| AO | What it means | Overall |
|---|---|---|
| AO1 | Demonstrate knowledge and understanding of the key concepts and principles of computer science. | 30% |
| AO2 | Apply knowledge and understanding of key concepts and principles of computer science. | 40% |
| AO3 | Analyse problems in computational terms to make reasoned judgements and to design, program, evaluate and refine solutions. | 30% |
key tips for success
Get comfortable in the onscreen editor
Paper 2 is onscreen with a real Python code editor. Familiarise yourself with the interface before the exam through Edexcel's practice materials.
Master Python 3 syntax cold
Paper 2 needs fluent Python 3: lists, loops, functions, string methods, file handling. Drill until you can write standard patterns without thinking.
Practise debugging under pressure
Paper 2 includes debugging tasks where you find and fix errors in given Python code. Practise reading unfamiliar code and diagnosing problems.
Learn binary and hex fast
Paper 1 tests binary/hex/denary conversion and binary arithmetic. Drill until fast and accurate.
Draw network diagrams
Paper 1 topology questions expect clean star/bus/mesh sketches with labels. Practise drawing under time.
Structure ethical answers
Paper 1 extended-response impact questions reward balanced arguments citing UK legislation (Data Protection Act 2018, Computer Misuse Act 1990).
Where to next
Start your learning journey today...
Practise with Cognito's free past papers for this spec – or browse grade boundaries and related specifications.
