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.

Data & Analytics skills

2 skills

  • 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

    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 SELECT, JOIN, GROUP BY, and subqueries.
    2. Practise turning a question into a single correct query.
    3. Run an untimed practice attempt before the proctored exam.

    The full exam guide for this skill is being written.