O Level Computer Science past papers
2210/21/M/J/25 · O Level Computer Science May/June 2025 Paper 21
11 questions, 75 marks. Each one links to its official mark scheme.
- Question 1 · 1 mark · Test data and trace tables
- Question 2 · 7 marks · Validation and verification
- Question 3 · 4 marks · Programming concepts
- Question 4 · 8 marks · Writing and amending algorithms, Validation and verification
- Question 5 · 4 marks · Programming concepts
- Question 6 · 6 marks · Finding and correcting errors, Programming concepts
- Question 7 · 8 marks · Logic gates and circuits
- Question 8 · 7 marks · Databases and SQL
- Question 9 · 8 marks · Programming concepts
- Question 10 · 7 marks · Test data and trace tables, Finding and correcting errors
- Question 11 · 15 marks · Writing and amending algorithms
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.