OCR A Level Computer Science Paper 1 Question Paper

Download the official OCR A Level Computer Science H446/01 Computer Systems question paper for the June 2025 examination series. This examiner-authentic OCR PDF contains the complete OCR A Level Computer Systems examination covering computer architecture, operating systems, logic circuits, databases, translators, compression, AI, networking concepts and low-level programming.

The paper includes detailed questions on data, address and control buses, GPUs and CPUs, secondary storage, multitasking operating systems, multi-level feedback queues, device drivers, utility software, Von Neumann versus Harvard architecture, pipelining, RISC and CISC architecture, multicore processors and virtual machines. Students are also assessed on binary conversion, floating-point arithmetic, bitwise operations and Little Man Computer (LMC) assembly language programming.

Programming and systems questions involve logic gates, half adders, full adders, Karnaugh maps, software libraries, interpreters versus compilers, SQL nested SELECT statements, relational databases, entity relationship diagrams, database normalisation and JavaScript-based quiz validation. The paper additionally explores ethical and legal implications of Artificial Intelligence image-generation systems, data compression using run length encoding and client-side web programming.

Extended-response questions require evaluation of thin client versus thick client systems, high-level versus low-level programming languages and AI-based image-generation systems involving legal and moral considerations. The paper tests both technical knowledge and analytical discussion skills using OCR’s level-of-response assessment style.

This OCR H446/01 June 2025 question paper is ideal for timed exam practice, mock examinations, programming revision and OCR A Level Computer Science preparation. It helps students understand OCR question structure, command words, mark allocation and examiner expectations across the entire Computer Systems specification.

Perfect for students preparing for the 2026 OCR examination series, teachers creating classroom assessments and tutors supporting OCR Computer Science revision. Pair this paper with the official OCR H446/01 June 2025 mark scheme for complete examiner-guided preparation and assessment practice. Fully compatible with desktop, tablet and mobile PDF viewing.

This document is designed for OCR A Level Computer Science students preparing for the 2026 examination series, especially candidates studying computer systems, architecture and databases. It is particularly useful for learners aiming to improve technical understanding, programming accuracy, computational thinking and extended-response exam technique.

It is also highly valuable for teachers, tutors, revision-course providers and independent learners who require authentic OCR exam material for classroom assessment, timed revision, mock examinations, SQL practice, logic-circuit analysis and targeted OCR Computer Science revision.