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Assessment
How Cambridge IGCSE Computer Science is assessed
There are no tiers. Everyone takes both papers, each worth 50%, and can get grades A*–G.
Syllabus 0478, for exams in 2026–2028. Cambridge has announced changes for 2029, which these details don’t cover.
All students
Paper 1: Computer Systems
Short-answer and structured questions on topics 1–6, no calculator
- Time
- 1 h 45 min
- Marks
- 75
- Weight
- 50%
Paper 2: Algorithms, Programming and Logic
Short-answer and structured questions plus a scenario question on topics 7–10, no calculator
- Time
- 1 h 45 min
- Marks
- 75
- Weight
- 50%
There is no separate practical or coursework. Programming is tested in the written Paper 2.
From the official Cambridge International syllabus, checked October 2026. Read the syllabus
Syllabus content
What’s on the Cambridge IGCSE Computer Science syllabus
Paper 1
- Data representation
- Data transmission
- Hardware
- Software
- The internet and its uses
- Automated and emerging technologies
Paper 2
- Algorithm design and problem-solving
- Programming
- Databases
- Boolean logic
Where marks are lost
Common Cambridge IGCSE Computer Science mistakes
Getting the loop count wrong.
Cambridge pseudocode FOR loops include the end value: FOR Count ← 1 TO 10 runs ten times. Trace it to check.
Confusing validation and verification.
Validation checks data is sensible (range, length, type, presence, format, check digit). Verification checks it was entered or copied correctly (double entry, visual check).
Mixing up bits and bytes in file sizes.
Divide bits by 8 to get bytes. A 100 × 100 image with 8-bit colour is 80 000 bits, which is 10 000 bytes.
Six computer science tutors, six ways to learn
Practise past-paper style questions with the exam coach, drill facts before a test with quick revision, or slow down with a step-by-step tutor. Switch any time.
- AidenConcept explainer
- MaxStep by step
- NadiaExam coach
- BenQuick revision
- SanaChallenger
- IrisConfidence builder
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FAQ
Cambridge IGCSE Computer Science questions, answered.
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