Modern React Fundamentals
Hooks, state, effects, performance and React 19 actions — tested the way product teams build today.
Covers the React most companies actually ship: component and state design, the rules of hooks, effects without bugs, memoisation and code-splitting, plus React 19 features such as form actions, useActionState, useOptimistic and use().
What it measures
Components & JSX
Props, keys, conditional rendering and composition.
State & Hooks
useState, useRef and the rules of hooks.
Effects
Dependencies, cleanup, races and when not to use an effect.
Performance
memo, useMemo/useCallback, context and lazy loading.
Forms & Data (React 19)
Actions, useActionState, useOptimistic, use() and error boundaries.
Who it's for
- Front-end and full-stack developers
- JavaScript developers adding React to their CV
- Bootcamp graduates
How the test works
- 20 questions drawn at random from a larger bank, balanced across every skill area above.
- Answer options are shuffled for each candidate, and the timer keeps running once you start.
- Your answers save automatically. If your connection drops, reopen your link to continue.
- Score 70% or more to earn a verifiable ARISE certificate. You get 2 attempts.
Try a sample question
Where should state live when two sibling components need to read and update the same value?