Computer Science

    WJEC
    A-Level

    Specification: 601/5031/2

    The WJEC A-Level Computer Science specification covers 1 topic with 7 learning objectives (601/5031/2). Use the topic browser below to explore subtopics, exam tips, common mistakes, and key terminology for each area of the course.

    Computer Science develops your understanding of how computers work and how to program them effectively. You'll learn algorithms, data structures, systems architecture and develop practical programming skills.

    1

    Topics

    7

    Objectives

    5

    Exam Tips

    5

    Pitfalls

    Ready to practise?

    AI-powered quizzes tailored to your specification

    Start Practising

    Key Features

    • Write and debug programs
    • Design efficient algorithms
    • Understand computer systems
    • Develop computational thinking

    Assessment Objectives

    AO1
    40%-45%

    Demonstrate knowledge and understanding of the principles and concepts of computer science, including abstraction, logic, algorithms and data representation

    AO2
    40%-45%

    Apply knowledge and understanding of the principles and concepts of computer science, including to analyse problems in computational terms

    AO3
    25%-30%

    Design, program and evaluate computer systems that solve problems, making reasoned judgements about these and presenting conclusions

    What Gets Top Grades

    A*/Grade 9

    Knowledge & Understanding

    Demonstrates comprehensive and accurate knowledge

    • Uses correct subject-specific terminology
    • Shows detailed understanding of concepts
    • Makes accurate connections between topics
    • Demonstrates depth beyond surface-level knowledge

    Application

    Applies knowledge effectively to new contexts

    • Selects relevant knowledge for the question
    • Adapts understanding to unfamiliar scenarios
    • Uses examples appropriately
    • Shows awareness of context

    Analysis & Evaluation

    Develops sophisticated analytical arguments

    • Constructs logical chains of reasoning
    • Considers multiple perspectives
    • Weighs evidence to reach justified conclusions
    • Acknowledges limitations and nuances

    Key Command Words

    WJEC
    State
    1 mark

    Give a single fact or term

    Identify
    1 mark

    Name, select, or recognise

    Outline
    2 marks

    Set out main features briefly

    Describe
    2-4 marks

    Give an account of what something is like or what happens

    Explain
    3-6 marks

    Give reasons with developed cause→effect chains

    Compare
    2-4 marks

    State similarities AND differences (both required)

    Analyse
    6-9 marks

    Examine in detail showing cause→effect→consequence chains

    Evaluate
    6-12 marks

    Weigh up BOTH sides, reach JUSTIFIED conclusion

    Assess
    6-12 marks

    Make judgments about importance with justification

    Calculate
    2-4 marks

    Show formula→substitution→calculation→answer with units

    Common Exam Mistakes

    Pitfalls to avoid in your exams

    • •Confusing binary and decimal place values, leading to incorrect conversions
    • •Misapplying the order of operations (BIDMAS) in algebraic expressions
    • •Forgetting to carry over in binary addition or borrow in subtraction
    • •Incorrectly simplifying expressions with negative indices or fractional powers
    • •Overlooking the need to check solutions in the original equation, especially for quadratic equations

    Top Examiner Tips

    Expert advice for exam success

    • •Practice conversions between number bases regularly to build speed and accuracy
    • •Show all working in algebra questions to gain method marks even if the final answer is wrong
    • •Use a systematic approach to solve equations: simplify, isolate the variable, and verify
    • •Familiarize yourself with common computing contexts where these skills are applied, such as IP addressing or file size calculations
    • •In exams, allocate time wisely: don't spend too long on a single conversion or equation

    Specification Topics

    1 topics

    Mathematics

    This subtopic covers fundamental mathematical concepts including number systems, algebraic manipulation, and the use of mathematical notation in computational contexts. It provides the essential toolkit for solving problems in computer science, such as data representation, algorithm analysis, and logical reasoning. Mastery of these skills is critical for success in A-Level Computer Science, as they underpin many theoretical and practical aspects of the subject.

    Number and Algebra

    7 objectives5 tips5 pitfalls

    Ready to master Computer Science?

    Start practising with AI-powered quizzes tailored to your WJEC A-Level specification. Every new account includes 7 days of full Premium — no card needed.

    Get Started Free
    Computer Science WJEC A-Level Topics & Revision