Instructions and covered skills
This test is designed to assess your understanding of React Hooks in functional components. Read each question carefully and choose the best answer. Do not use external resources. Ensure you are in a distraction-free environment. Turn off notifications and stay focused. You will have a limited time to complete the test.
Key Areas
Understanding of useState and its updater function with previous state, useEffect with dependency arrays and cleanup functions, useContext for context consumption without prop drilling, useRef for mutable references that persist across renders, useMemo for memoized values, useCallback for memoized functions, custom hook naming conventions (prefix with 'use'), and handling asynchronous operations with abort controllers in useEffect.
Recommended Preparation
Familiarity with functional components, JavaScript closures, async/await, and the concept of side effects. Practice building small apps that use various hooks, such as a counter with useState, a data-fetching component with useEffect, a theme toggler with useContext, and a timer with useRef. Review the official React Hooks documentation and common patterns for custom hooks.