Cambridge IGCSE Computer Science (0478) - March 2020 Past Papers
Download 6 free IGCSE Computer Science past papers, mark schemes, and examiner reports from the March 2020 Cambridge examination session. Includes question papers for all variants with full solutions.
About IGCSE Computer Science (0478)
IGCSE Computer Science covers computational thinking, programming, data representation, hardware, software, and networks. Candidates must write algorithms, trace code execution, and understand how computer systems work.
What this exam tests: Key skills include pseudocode writing, binary/hex conversions, database design, and logic circuit analysis.
Papers available in variants 11, 12, 13 for different time zones. All variants cover the same Computer Science syllabus with equal difficulty.
Study Resources for Computer Science
Prepare for your exam with these complementary resources:
0478 March 2020 Papers
0478 Paper 1 - Theory
1 hr 45 min • 75 marks
Tests broad syllabus knowledge with 40 questions. Each question has four options (A-D). Core tier paper.
0478 Paper 2 - Problem-solving and Programming
1 hr 45 min • 50 marks
Extended tier multiple choice with more challenging questions covering the full syllabus. 40 questions, 45 minutes.
Other Resources
Additional materials to help you prepare and understand how exams are marked.
Examiner Report
Insights from examiners on how students performed. Learn common mistakes to avoid and what examiners look for in top answers.
About Cambridge IGCSE Computer Science (0478)
Cambridge IGCSE Computer Science (0478) is one of the most popular qualifications taken by students worldwide. The March 2020 examination session included 2 paper components, each testing different skills and knowledge areas.
This page contains all 0478 past papers from March 2020, including question papers (QP), mark schemes (MS), and examiner reports (ER). Use these resources to practice under timed conditions and understand how examiners award marks.
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0478 Study Tips & FAQ
What are paper variants?
Cambridge releases multiple variants of each paper (e.g., Paper 11, 12, 13) to accommodate different time zones around the world and maintain exam security.
- Variant 1 (e.g., 11, 21): Usually for Zone 1 (Americas)
- Variant 2 (e.g., 12, 22): Usually for Zone 2 (Europe, Africa)
- Variant 3 (e.g., 13, 23): Usually for Zone 3 (Asia, Oceania)
All variants cover the same syllabus and have similar difficulty. Practice with any variant to prepare effectively for your exam.
How to use Mark Schemes effectively
Mark schemes show exactly how examiners award marks for each question. Understanding them helps you write answers that earn full marks.
Example from a Physics mark scheme:
Mark scheme answer:
• speed = distance / time [1 mark for formula]
• speed = 150 / 5 = 30 m/s [1 mark for correct answer with unit]
Tips:
- Look for key words that must appear in your answer
- Note how many points are needed for each mark
- Check if units are required for the final mark
- Understand the difference between "state" (brief) and "explain" (detailed)
Understanding Grade Thresholds
Grade thresholds show the minimum marks needed for each grade. They vary each session based on paper difficulty — harder papers have lower thresholds.
Example Grade Thresholds (out of 100 total):
* Actual thresholds vary by subject and session
How to use thresholds:
- Set realistic target marks based on your goal grade
- Track your practice paper scores against thresholds
- Remember: you don't need 100% for an A* — aim for consistency
- Compare thresholds across sessions to gauge difficulty trends
How is the topic breakdown calculated?
The "Topics Breakdown by Paper" section above shows which syllabus topics are tested in each paper and how many marks they carry. Here's how we calculate this:
Our methodology:
- Extract questions: We analyze each question paper (QP) and identify individual questions and their mark allocations (shown in square brackets, e.g., [3]).
- Match to syllabus: Each question is matched to the official Cambridge 0478 syllabus topics based on keywords, concepts, and question content.
- Sum marks per topic: For each paper, we add up the marks for all questions testing the same topic. For example, if Q1 (4 marks) and Q5b (3 marks) both test "Enzymes", that topic shows as "7 marks" for that paper.
Example: If Paper 3 shows "Photosynthesis - 13 marks", it means questions worth a total of 13 marks (out of the paper's 80 marks) tested the Photosynthesis topic from the Plant Nutrition unit of the syllabus.
How to use this: Look at the paper(s) you'll be taking (e.g., Papers 2, 4, 6 for Extended tier). The topics with the highest marks in YOUR papers are where you should focus your revision. A topic worth 15 marks deserves more study time than one worth 3 marks.
Note: Our topic matching may be inaccurate for questions that span multiple topics. Use this as a guide alongside the official syllabus.
How to Use IGCSE Computer Science Past Papers
📝 Timed Practice
Complete papers under exam conditions. 0478 Paper 4 is 1 hour 15 minutes - practice finishing within this time to build exam stamina.
✅ Self-Marking
Use the mark scheme to score your answers. Look for marking points you missed and understand what examiners expect in Computer Science responses.
📊 Examiner Reports
Read the 0478 examiner report to see common mistakes. Focus revision on topics where candidates typically lose marks.
🎯 Grade Targets
Check grade thresholds to see how many marks you need for your target grade. An A* in IGCSE Computer Science typically requires 85-90%.
Frequently Asked Questions
Where can I download IGCSE Computer Science March 2020 past papers?
Are 0478 mark schemes included?
What papers are available for IGCSE Computer Science 0478?
What is the difference between paper variants 11, 12, and 13?
How can I practice these past papers effectively?
Continue Studying Computer Science
Prepare for these topics before attempting the past papers:
Copyright & Educational Use
All examination materials including question papers, mark schemes, and examiner reports are the intellectual property of Cambridge Assessment International Education.
We share these materials freely for educational purposes to help students prepare for their examinations. This platform is an independent study resource and is not affiliated with or endorsed by Cambridge International.
For official examination resources, registration, and support, please visit cambridgeinternational.org.