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.

All skills

6 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
    Open to start preparing

  • 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

    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

    • Untimed practice

      An unproctored run-through that gives feedback by topic so you can find your gaps. It does not affect your Verified result.

      No time limit · Unproctored · Practice only

    How to start preparing

    1. Review how types, interfaces, and generics describe real data shapes.
    2. Practise narrowing and handling nullable values without escape hatches.
    3. Take an untimed practice run before a proctored attempt.

    The full exam guide for this skill is being written.

  • Python for Data Analysis

    Data & AnalyticsIntermediate

    Verify you can load, clean, and analyse tabular data in Python and communicate what the numbers mean.

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

  • SQL & Databases

    Data & AnalyticsFoundational

    Show you can query relational data with joins, aggregation, and subqueries, and reason about a schema.

    • Proctored exam
    • Untimed practice
    Open to start preparing

  • Cloud Fundamentals

    Cloud & InfrastructureFoundational

    Demonstrate the core cloud building blocks — compute, storage, networking, and the shared-responsibility model.

    • Proctored exam
    • Adaptive mode
    Open to start preparing