IGCSE Computer Science (Cambridge code 0478) is one of the fastest-growing Cambridge subjects worldwide. It combines theoretical knowledge with practical programming skills, tested through algorithm writing, pseudocode, and logical problem solving. This guide gives you free access to all 0478 past papers and AI explanations for every type of question.
Quick Answer:
IGCSE Computer Science 0478 past papers are free at Aixampapers.com, with AI explanations for every question — including trace tables, pseudocode debugging, and the algorithm design questions that most students find hardest.
IGCSE Computer Science 0478 — Paper Structure
| Paper | Duration | Marks | Format |
|---|---|---|---|
| Paper 1 | 1.5 hours | 75 | Theory: short and structured questions |
| Paper 2 | 1.75 hours | 50 | Problem solving: algorithms, pseudocode, flowcharts |
IGCSE Computer Science 0478 — Full Syllabus
Data Representation
- Binary, denary, hexadecimal — conversions between all three
- Binary addition, two's complement for negative numbers
- ASCII and Unicode
- Image representation: pixels, colour depth, resolution, file size calculation
- Sound: sampling rate, bit depth, file size
- Data compression: lossless vs lossy
Data Transmission
- Serial vs parallel transmission
- Simplex, half-duplex, full-duplex
- Error detection: parity bits, checksums, ARQ
- Encryption: symmetric vs asymmetric
Hardware
- CPU components: ALU, CU, registers, cache, buses
- Fetch-decode-execute cycle
- Primary and secondary storage
- Input/output devices
- Embedded systems
Software
- Operating systems: functions, types
- Utility software
- Programming languages: high-level vs low-level, translators
Internet and Networks
- LAN vs WAN, topologies (bus, star, mesh)
- Client-server vs peer-to-peer
- The Internet: IP addresses, DNS, packets, routers
- HTTP, HTTPS, FTP, email protocols
- Cybersecurity: malware types, firewalls, authentication, phishing
Algorithms and Programming (Paper 2)
- Cambridge pseudocode: variables, selection, iteration, procedures, functions
- Arrays: 1D and 2D
- Common algorithms: linear search, bubble sort, count occurrences
- Flowcharts: decision symbols, loops, I/O
- Trace tables: tracing variables through code step by step
- Decomposition, abstraction, pattern recognition
Frequently Asked Questions
Where can I download IGCSE Computer Science 0478 past papers for free?
Aixampapers.com provides all IGCSE Computer Science 0478 past papers free, including Papers 1 and 2, with marking schemes and AI explanations for every question type including pseudocode and trace tables.
Is pseudocode hard to learn for IGCSE Computer Science?
Cambridge uses its own specific pseudocode syntax which must be followed in Paper 2. The best way to learn it is by reading model answers from past papers and practising writing pseudocode from scratch. The AI tutor can check your pseudocode and explain corrections.
What are the hardest topics in IGCSE Computer Science 0478?
Most students find trace tables (tracking variable values through loops), two's complement arithmetic, and writing original algorithms the most challenging. These require systematic practice — not just reading theory.
What programming language should I use for IGCSE Computer Science?
Paper 2 requires Cambridge pseudocode — not a specific real programming language. However, learning Python or another language alongside the course helps build algorithmic thinking. You will not be examined in a real programming language, only in Cambridge pseudocode and flowcharts.