AQA A Level Computer Science Paper 1 2025 Mark Scheme

Get the official AQA A-Level Computer Science Paper 1 mark scheme from the June 2025 series (7517/1), version 1.0 Final. This is the exact examiner-approved document used during marking and standardisation, ensuring consistent grading across all candidates.

The mark scheme includes detailed step-by-step answers, indicative content, level-of-response descriptors, and fully worked programming solutions across multiple languages (Python, Java, C#, VB.Net). It shows precisely how marks are awarded for algorithm questions, recursion, data structures, finite state machines, regular expressions, and extended programming tasks such as encryption, RPN evaluation, and game logic modifications.

Use this resource to understand examiner expectations in depth, identify common mistakes (e.g. hashing collisions, recursion base cases, FSM transitions), and learn how marks are distributed across AO1, AO2, and AO3 skills. Pair it with the AQA 7517/1 June 2025 question paper for full exam practice. Updated for the 2025/2026 academic year and optimised for fast, mobile-friendly access on markscheme.net.

This document is for A-Level Computer Science students preparing for the 2026 exam series, including Year 13 students, retake candidates targeting A/A*, and independent learners aiming to master Paper 1 programming and algorithmic thinking.

It is also highly valuable for teachers, tutors, and examiners who need accurate, standardised marking guidance. It supports mock exam marking, grade standardisation, and structured walkthroughs of high-mark programming questions using real examiner criteria.