Skills

Browse testable skills

Browse the skills you can be tested on, grouped by category. Each skill shows the exam formats you can take it in — open a skill to see the full format breakdown and a short plan to start preparing.

Ready to prove one? Take a skill exam — free, scored, and Verified on completion.

Web Development skills

3 skills

  • JavaScript Fundamentals

    Web DevelopmentFoundational

    Verify practical JavaScript for everyday web and application work — the language core, async patterns, and the DOM.

    • Proctored exam
    • Untimed practice
    • Adaptive mode
    Open to start preparing

  • React Development

    Web DevelopmentIntermediate

    Demonstrate component design, hooks, state, and rendering behaviour for production React interfaces.

    • Proctored exam
    • Adaptive mode

    Exam formats

    • Proctored exam

      A timed, integrity-checked attempt that produces a Verified, selection-eligible result you can share with employers.

      About 60 minutes · Proctored · Verified result

    • Adaptive mode

      Question difficulty adjusts to your answers so the exam reaches a confident result in fewer questions.

      Variable length · Proctored · Verified result

    How to start preparing

    1. Refresh component composition, props, and the core hooks.
    2. Work through state and effect patterns on a small feature.
    3. Use the adaptive exam to reach a result in fewer questions.

    The full exam guide for this skill is being written.

  • TypeScript Essentials

    Web DevelopmentIntermediate

    Show you can model data with types, use generics and narrowing, and keep a TypeScript codebase type-safe.

    • Proctored exam
    • Untimed practice
    Open to start preparing