OCR A-Level Computer Science Component 1 Revision Pack — Computer Systems (H446)

Everything your A-Level Computer Science students need to revise confidently for OCR Component 1 — in one complete, ready-to-use pack.**

This revision pack covers all five topic areas assessed in OCR A-Level Computer Science Component 1 (H446 — Computer Systems), providing structured revision notes, exam-style practice questions, and a full mark scheme. Ideal for use in lessons, revision sessions, or as a self-study resource for students.

**What's included:**

- **Revision Notes** — Comprehensive topic-by-topic notes covering the entire Component 1 specification, including key definitions, worked examples, and exam tips

- **Practice Questions** — 9 exam-style questions with mark allocations, spanning all five topic areas

- **Answer Scheme** — Full model answers with detailed mark-by-mark breakdowns for every question

**Topics covered:**

- **Characteristics of Contemporary Processors** — Von Neumann vs Harvard architecture, CISC vs RISC, registers (PC, MAR, MDR, CIR, ACC), address/data/control buses, Fetch-Decode-Execute cycle, pipelining, multicore processing, magnetic/solid state/optical storage

- **Software and Software Development** — Systems vs applications software, OS functions (memory management, interrupts, scheduling), Waterfall vs Agile vs Spiral vs RAD methodologies, compilers, interpreters, assemblers, stages of compilation (lexical analysis, syntax analysis, code generation, optimisation)

- **Exchanging Data** — Relational databases, normalisation (1NF, 2NF, 3NF), ACID transactions, SQL, TCP/IP stack, DNS, circuit switching vs packet switching, HTML/CSS/JavaScript, search engine indexing

- **Data Types, Data Structures and Algorithms** — Two's Complement, floating-point representation, stacks, queues, binary search trees, hash tables, graphs (adjacency matrix/list), Dijkstra's algorithm, A* algorithm, Quick Sort, Merge Sort

- **Legal, Moral, Cultural and Ethical Issues** — Data Protection Act 2018 (GDPR), Computer Misuse Act 1990, Copyright Act 1988, RIPA 2000, AI ethics, algorithmic bias, digital divide, e-waste

**Suitable for:** OCR A-Level Computer Science specification H446.

**Delivered as:** A single ZIP file containing all three documents. Download instantly and use in your classroom tomorrow.