OCR GCSE Computer Science Paper 1 2025 Question Paper

Get the official OCR GCSE Computer Science Computer Systems (J277/01) June 2025 question paper — the authentic OCR exam paper used in the Summer 2025 GCSE examination series. This downloadable PDF includes exam-style questions on sound sampling, bitmap images, colour depth, operating systems, encryption, networking, mesh topology, Wi-Fi, cloud storage, IPv4 addressing, DNS, legislation, binary arithmetic, hexadecimal conversion, Unicode, ASCII, and CPU registers.

Use this OCR J277/01 June 2025 question paper to practise genuine OCR exam-style Computer Science responses under timed conditions and prepare effectively for the 2026 GCSE Computer Science examinations. Pair it with the matching OCR J277/01 June 2025 mark scheme on markscheme.net to compare your answers with examiner-approved solutions and marking criteria. Updated for the 2025/2026 academic year, fully optimised for mobile and desktop, and instantly downloadable from markscheme.net — your fastest route to top-grade GCSE Computer Science revision.

This document is designed for OCR GCSE Computer Science students preparing for the 2026 exam series, including Year 10 and Year 11 candidates, resit learners targeting Grades 7–9, home-educated students, and independent candidates studying computer systems, networking, cybersecurity, and data representation.

It is also ideal for teachers, private tutors, intervention coordinators, revision-course providers, and parents supporting GCSE Computer Science revision at home. The paper can be used for timed mock examinations, topic-based revision, classroom assessment, independent study, and preparation for OCR AO1 and AO2 Computer Science assessments.