How many papers are in CIE A-Level Computer Science?

Four for the full A Level. Paper 1 (1h 30m, 75 marks) is AS theory. Paper 2 (2h, 75 marks) is AS problem-solving and programming. Paper 3 (1h 30m, 75 marks) is Advanced Theory. Paper 4 (2h 30m, 75 marks) is Advanced Practical.

What topics does this syllabus cover?

20 topics across 4 papers. AS papers cover data representation, communication, hardware, processor architecture, system software, security, ethics, databases, algorithm design and problem-solving, data types and programming. A Level extends with computational thinking, Boolean algebra, virtual machines, operating systems, advanced algorithms, object-oriented programming, recursion and declarative programming.

How does the Paper 4 practical work?

Paper 4 is an on-screen practical assessment of 2h 30m, 75 marks. Students complete programming tasks including designing algorithms, writing code and testing solutions. Contexts can fall outside the taught syllabus, so transferable skills matter. Practise using CIE's specimen materials before the exam.

What's the difference between AS and full A Level?

AS Level is Papers 1 and 2 only, graded a-e as a standalone qualification. The full A Level adds Papers 3 and 4, graded A*-E. Students can take the AS as a standalone, stage the qualification, or take all four papers in one series.

Which programming languages does CIE use?

CIE uses its own pseudocode for theory questions. For practical work, learners use Java (console mode), Visual Basic (console mode) or Python (console mode), no other languages are permitted. Confirm with your school which of the three you're using for Paper 4.

Does Cognito cover CIE A-Level Computer Science?

Cognito has past papers and mark schemes for CIE A-Level Computer Science (9618). Use them for timed practice and check your answers against the official mark schemes as you go.

CIE A-Level Computer Science (9618) Specification

Cambridge International A Level Computer Science (9618) is a two-year linear qualification covering 20 topics from data representation through to software development. Papers 1 and 2 cover AS content (theory + practical); Papers 3 and 4 add the A2 (advanced theory + practical). Graded A*-E for the full A Level.

Download the official spec (PDF)

specification overview

1-4. Information representation, communication and hardware (AS theory)
Paper 1
- Data representation (binary, hexadecimal, characters, images, sound)
- Communication and internet technologies
- Hardware and computer components
- Processor fundamentals and CPU architecture
5-8. System software, security, ethics and databases (AS theory)
Paper 1
- System software and operating systems
- Security, privacy and data integrity
- Ethics and ownership
- Databases and database concepts
9-12. Algorithms, data types, programming and software development (AS practical)
Paper 2
- Algorithm design and problem-solving
- Data types and structures (arrays, records, files)
- Programming (pseudocode and one of Java/VB/Python)
- Software development life cycle and testing
13-18. Advanced theory (A Level)
Paper 3
- Data representation (extended, user-defined types)
- Communication and internet (protocols, networks)
- Hardware, parallel processing and virtual machines
- System software and operating system purposes
- Security (encryption, protocols, digital signatures)
- Artificial intelligence
19-20. Computational thinking and further programming (A Level practical)
Papers 3, 4
- Advanced algorithms and recursion
- Programming paradigms (object-oriented, procedural, declarative)

subject content

Paper	What's assessed	Length	Marks	Weight	Question types
Paper 1 (Theory Fundamentals)	AS theory sections 1-8	1h 30m	75	25% of A Level / 50% of AS Level	Short-answer and structured questions
Paper 2 (Fundamental Problem-solving and Programming Skills)	AS practical sections 9-12	2h	75	25% of A Level / 50% of AS Level	Short-answer and structured questions on algorithms and programming
Paper 3 (Advanced Theory)	A Level theory sections 13-20 (with AS content assumed)	1h 30m	75	25% of A Level	Short-answer and structured questions
Paper 4 (Practical)	A Level practical sections 19-20 only (except low-level and declarative programming)	2h 30m	75	25% of A Level	On-screen practical assessment using Java (console), Visual Basic (console) or Python (console)

PaperPaper 1 (Theory Fundamentals)

What's assessedAS theory sections 1-8

Length1h 30m

Marks75

Weight25% of A Level / 50% of AS Level

Question typesShort-answer and structured questions

PaperPaper 2 (Fundamental Problem-solving and Programming Skills)

What's assessedAS practical sections 9-12

Length2h

Marks75

Weight25% of A Level / 50% of AS Level

Question typesShort-answer and structured questions on algorithms and programming

PaperPaper 3 (Advanced Theory)

What's assessedA Level theory sections 13-20 (with AS content assumed)

Length1h 30m

Marks75

Weight25% of A Level

Question typesShort-answer and structured questions

PaperPaper 4 (Practical)

What's assessedA Level practical sections 19-20 only (except low-level and declarative programming)

Length2h 30m

Marks75

Weight25% of A Level

Question typesOn-screen practical assessment using Java (console), Visual Basic (console) or Python (console)

The full A Level route is all four papers. Students can also stage the qualification: Papers 1 and 2 for the standalone AS Level, then Papers 3 and 4 to complete the A Level.

assessment structure

AO	What it means	Overall
AO1	Demonstrate knowledge and understanding of the principles and concepts of computer science, including abstraction, logic, algorithms and data representation.	30% (both AS and A Level)
AO2	Apply knowledge and understanding of the principles and concepts of computer science, including to analyse problems in computational terms.	40% AS / 30% A Level
AO3	Design, program and evaluate computer systems to solve problems, making reasoned judgements about these.	30% AS / 40% A Level

AOAO1

What it meansDemonstrate knowledge and understanding of the principles and concepts of computer science, including abstraction, logic, algorithms and data representation.

Overall30% (both AS and A Level)

AOAO2

What it meansApply knowledge and understanding of the principles and concepts of computer science, including to analyse problems in computational terms.

Overall40% AS / 30% A Level

AOAO3

What it meansDesign, program and evaluate computer systems to solve problems, making reasoned judgements about these.

Overall30% AS / 40% A Level

assessment objectives

Practise on-screen for Paper 4
Paper 4 is an on-screen practical assessment. Practise coding under timed conditions using CIE's specimen materials and past papers.
AS content is assumed on A Level papers
Papers 3 and 4 assume you still know Papers 1 and 2 content. Revise AS as part of your A Level preparation.
Master pseudocode
CIE has its own pseudocode style. Learn it early so you can read exam questions fluently and write your answers correctly.
Learn Boolean algebra
Advanced Theory (Paper 3) tests Boolean algebra and logic gate simplification. Practise Karnaugh maps and DeMorgan's Laws until automatic.
Practise SQL and database design
Databases sit in Paper 1 (section 8), not Paper 2. Practise SELECT/JOIN queries and normalising unstructured tables to 3NF for the theory paper. Paper 2 tests algorithms, data types, programming and software development (sections 9-12).
Know your programming paradigms
Object-oriented, procedural, declarative and functional all appear on the A Level papers. Understand differences and when each is applied.

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