We counted every question in our own IGCSE & O Level Computer Science 0478 & 2210 question bank — 641 questions worth 1,875 marks, 2023 to 2026 — and sorted them into the 18 chapters of the syllabus. Number Systems carries the most marks.
Every chapter, heaviest first
| Chapter | Questions | Marks | Share | |
|---|---|---|---|---|
| Number Systems | 111 | 247 | 13.2% | |
| Computer Architecture | 57 | 182 | 9.7% | |
| Data Storage | 48 | 157 | 8.4% | |
| Cyber Security | 39 | 157 | 8.4% | |
| Types and Methods of Data Transmission | 48 | 154 | 8.2% | |
| The Internet and the World Wide Web | 35 | 131 | 7.0% | |
| Programming Languages, Translators and IDEs | 32 | 105 | 5.6% | |
| Artificial Intelligence | 29 | 104 | 5.5% | |
| Methods of Error Detection | 31 | 97 | 5.2% | |
| Types of Software and Interrupts | 31 | 97 | 5.2% | |
| Data Storage and Compression | 45 | 94 | 5.0% | |
| Text, Sound and Images | 23 | 77 | 4.1% | |
| Automated Systems | 18 | 72 | 3.8% | |
| Input and Output Devices | 39 | 62 | 3.3% | |
| Network Hardware | 20 | 47 | 2.5% | |
| Robotics | 16 | 43 | 2.3% | |
| Encryption | 13 | 36 | 1.9% | |
| Digital Currency | 6 | 13 | 0.7% |
The top 6 of 18 chapters hold half the marks in the bank. The three heaviest are Number Systems, Computer Architecture, Data Storage. The lightest is Digital Currency, at 0.7% of the marks.
Inside the chapters
| Sub-topic | Chapter | Questions | Marks |
|---|---|---|---|
| 1.1 | Number Systems | 111 | 247 |
| 3.1 | Computer Architecture | 57 | 182 |
| 3.3 | Data Storage | 48 | 157 |
| 5.3 | Cyber Security | 39 | 157 |
| 2.1 | Types and Methods of Data Transmission | 48 | 154 |
| 5.1 | The Internet and the World Wide Web | 35 | 131 |
| 4.2 | Programming Languages, Translators and IDEs | 32 | 105 |
| 6.3 | Artificial Intelligence | 29 | 104 |
| 2.2 | Methods of Error Detection | 31 | 97 |
| 4.1 | Types of Software and Interrupts | 31 | 97 |
How to use this
Revise the heaviest chapters first. A chapter worth 13% of the marks deserves more than one worth 0.7%.
Use it to decide what to practise, not what to skip. A light chapter can still be the difference between two grades, and Cambridge can set anything on the syllabus.
Check yourself chapter by chapter rather than by whole papers, so a weak topic shows up while there is still time to fix it.
These are ExamYard’s own figures: the questions in our IGCSE & O Level Computer Science 0478 & 2210 question bank, grouped into the chapter of the syllabus each one tests, and added up by the marks each carries. No question text, mark scheme or examiner report is reproduced on this page. The printed book and the online bank are counted separately, so the totals on this page need not match the book’s own page.