Question 1: Why is the functional updater form of useState recommended?
- It improves styling
- It avoids stale state issues
- It reduces bundle size
- It enables routing
Explanation: Functional updates always receive the latest state value.
This intermediate React Hooks quiz is designed for developers who understand the basics and want to test applied knowledge of hooks like useState, useEffect, useReducer, useCallback, useMemo, and custom hooks. Ideal for interview preparation and real-world React development practice.
Explanation: Functional updates always receive the latest state value.
Explanation: Missing dependencies can cause stale closures and bugs.
Explanation: useReducer is ideal for managing complex state transitions.
Explanation: useCallback memoizes function references to avoid re-creation.
Explanation: Cleanup runs before the effect re-runs or when the component unmounts.
Explanation: useMemo caches expensive computed values.
Explanation: React relies on consistent hook call order between renders.
Explanation: Prop drilling makes components harder to maintain.
Explanation: useContext allows shared state without deep prop passing.
Explanation: useRef persists mutable values without triggering re-renders.
Explanation: useLayoutEffect runs before the browser paints the UI.
Explanation: API calls are side effects handled inside useEffect.
Explanation: React.memo prevents unnecessary re-renders when props are unchanged.
Explanation: Custom hooks enable reusable logic sharing.
Explanation: Controlled components derive input values from state.
Explanation: An empty array ensures the effect runs only once.
Explanation: Timers are side effects managed in useEffect.
Explanation: Immutability allows React to detect changes efficiently.
Explanation: useReducer returns state and a dispatch function.
Explanation: useCallback stabilizes function references passed as props.
Explanation: useMemo recalculates only when dependencies change.
Explanation: useRef can store previous values across renders.
Explanation: Custom hooks promote logic reuse and cleaner code.
Explanation: Heavy computations in render can slow down rendering.
Explanation: useState is commonly used for controlled inputs.
Explanation: Closures may capture outdated state if dependencies are wrong.
Explanation: Splitting context reduces unnecessary re-renders.
Explanation: useSyncExternalStore is designed for external store subscriptions.
Explanation: Cleanup functions handle unmount logic.
Explanation: Overusing memoization increases memory usage.
Explanation: useLayoutEffect ensures measurements before paint.
Explanation: Consistent calling ensures correct hook state mapping.
Explanation: Debouncing is typically implemented via custom hooks.
Explanation: useTransition defers non-urgent updates.
Explanation: useMemo caches derived data.
Explanation: Direct mutation can cause unpredictable behavior.
Explanation: useTransition helps manage async rendering priorities.
Explanation: useState is simple and effective for boolean toggles.
Explanation: Reducers centralize and clarify state transitions.
Explanation: Custom hooks encapsulate side-effect logic.
Explanation: useMemo stabilizes object references.
Explanation: useLayoutEffect can block paint if overused.
Explanation: Custom hooks share logic without extra components.
Explanation: Subscriptions are side effects managed in useEffect.
Explanation: Functional updaters always use the latest state.
Explanation: Hooks enable cleaner and reusable logic.
This intermediate React Hooks quiz is designed for developers who understand the basics and want to test applied knowledge of hooks like useState, useEffect, useReducer, useCallback, useMemo, and custom hooks. Ideal for interview preparation and real-world React development practice.