Question 1

When should I start doing Cambridge International (CIE) IGCSE Computer Science past papers?

Accepted Answer

Starting past-paper practice earlier than you might think pays off for CIE IGCSE Computer Science. We'd suggest using our by-topic exam practice throughout the year, working through targeted questions on each topic as you cover it in class, so you're building exam technique alongside your content understanding. Then, in the final few weeks before your May/June exams, we'd suggest completing 2–3 full past papers as mocks to build stamina across both the 1 hour 45 minute papers. Our by-topic view makes it straightforward to identify which topics still need attention before you move on to those full mock papers.

Question 2

How many past papers should I do?

Accepted Answer

Working through past papers is one of the most effective ways to prepare for CIE IGCSE Computer Science (0478), and the more you can complete in the weeks before your exams, the more confident you'll feel with the question styles across both Paper 1 (Computer Systems) and Paper 2 (Algorithms, Programming and Logic). We'd suggest using our exam practice and by-topic view to identify content gaps first, then moving on to full past papers once you have a solid base in place. When you work through each paper, active recall helps: attempt the questions without your notes open, then check the mark scheme carefully to see exactly what CIE is looking for.

Question 3

Should I do past papers under timed conditions?

Accepted Answer

Yes! Working through past papers with the clock running is one of the most effective ways to prepare for CIE IGCSE Computer Science (0478), because both Paper 1 and Paper 2 are each 1 hour 45 minutes with 75 marks, and pacing yourself across that time is a real skill worth building.

We'd suggest starting with our notes and exam practice to consolidate each topic first, then attempting full papers to develop your timing instincts. In Paper 2, plan enough time for the longer scenario question (worth up to 15 marks); using its mark tariff as your pacing guide is a solid starting point, so practising that balance specifically is really worthwhile.

Our by-topic view lets you work through shorter, focused question sets before moving to full timed runs, which is a great way to use spaced retrieval to build confidence gradually rather than jumping straight into a full paper cold.

Question 4

What should I do if I get a low mark on a past paper?

Accepted Answer

Getting a low mark on a past paper is discouraging, but it gives you precise information about where to focus your revision. We'd suggest going through the mark scheme carefully, question by question, to pinpoint exactly which topics or skills cost you marks.

Paper 1 covers computer systems content and Paper 2 covers algorithms, programming and logic, so it's worth identifying whether your gaps are concentrated in one paper or spread across both. Once you've spotted the weak areas, our notes and flashcards are the best place to revisit the content using spaced retrieval, which helps the knowledge stick far better than simply re-reading. After consolidating those topics, use our exam practice to target those specific areas before attempting another full paper.

Question 5

How do I mark my own past paper using the Cambridge International (CIE) mark scheme?

Accepted Answer

Marking your own work is one of the most effective revision habits you can build. We'd suggest downloading the official mark scheme from Cambridge International's website alongside the question paper, then working through each question and comparing your answer to the mark points listed.

The command words used in each question are your guide to what Cambridge expects: 'Describe' asks for characteristics and main features, 'Explain' asks you to set out reasons and make relationships clear, and 'Calculate' means working out from given information. Cambridge publishes the full list of command words and their meanings in the specification, so checking these as you mark is really useful.

For the 15-mark scenario question in Paper 2, Cambridge provides an indicative response in the mark scheme, which helps you judge the quality of your pseudocode or program code answers. Our exam practice questions include worked examples that help you understand the level of detail Cambridge expects before you attempt a full past paper.