Pearson Edexcel GCSE Computer Science Past Papers & Mark Schemes

Pearson Edexcel GCSE Computer Science (specification code 1CP2) is assessed through two written papers and a programming project component. The specification covers a wide range of theoretical and practical computing topics, equipping students with both the conceptual knowledge to understand how computer systems work and the programming skills to design and implement solutions to computational problems. Paper 1 — Principles of Computer Science — is a written theory paper lasting 1 hour 30 minutes, worth 50 marks. It covers computer systems including CPU architecture and instruction sets, memory and storage, networks, cybersecurity, data representation, and systems software. Questions range from short definitions and calculations to extended written responses evaluating the advantages and disadvantages of different approaches. Paper 2 — Application of Computational Thinking — also lasts 1 hour 30 minutes and is worth 50 marks. This paper tests students' ability to apply computational thinking to solve problems, including algorithm design, programming constructs (sequence, selection, iteration, procedures, and data structures), and problem decomposition. Students write code using the Edexcel Programming Language Subset (PLS), which is a pseudocode-like language defined in the specification. The PLS reference document is included in this archive. The programming project (previously the NEA) allows students to design, develop, and test a computational solution to a real-world problem. This is assessed internally and moderated externally. Unlike the written papers, the project is not available as past paper practice — but the skills it demands (decomposition, algorithm design, testing, and evaluation) are directly relevant to Paper 2. Edexcel GCSE Computer Science data files are sometimes released for Paper 2 practice, allowing students to work with pre-written code snippets as part of their exam preparation.