AQA As Computer Science Paper 1 2025 Mark Scheme

Get the official AQA AS Computer Science Paper 1 mark scheme from the June 2025 series (7516/1), version 1.0 Final. This is the exact examiner-approved document used during marking and standardisation to ensure consistent grading across all candidates.

The mark scheme provides detailed answers and marking guidance for all sections of the on-screen programming exam. Section A includes full worked solutions for algorithm tracing (e.g. linked structure traversal in Question 1 on page 6), loop behaviour comparisons, and the palindrome program implementation. Section B contains precise answers for Skeleton Program analysis, including subroutines, exception handling, and data structures. Section C includes full programming solutions for extending the Skeleton Program, such as tracking walking time, validating landing positions, and implementing clue logic using map traversal.

It also includes level-of-response marking criteria, examiner annotations, and accepted alternative answers across multiple programming languages (Python, C#, Java, VB.Net). These insights show exactly how marks are awarded for AO1 (knowledge), AO2 (analysis), and AO3 (programming).

Use this mark scheme to understand examiner expectations, identify common mistakes (e.g. unnecessary comparisons in palindrome logic, boundary errors in map traversal), and improve your programming technique for the 2026 exam. Best used alongside the AQA 7516/1 May 2025 question paper and Skeleton Program resources.

This document is for AS Computer Science students preparing for the 2026 exam series, including Year 12 students and those developing core programming skills for A-Level progression.

It is also highly valuable for teachers and tutors who need accurate marking guidance for mock exams, coursework preparation, and structured walkthroughs of Skeleton Program-based programming tasks.