React Questions
Master your React fundamentals, advanced mechanics, and ace your frontend interview challenges.
Showing 21 of 21 questions
Autocomplete Search Hook with Race-Condition Prevention
Implement a reusable useAutocomplete custom React hook with AbortController, cache deduplication, and full lifecycle cleanup to prevent async race conditions.
React: Component Composition and the children Prop
Learn component composition in React. Understand how to design reusable wrapper layouts, handle dynamic slots, and prevent prop drilling using the children prop.
React: Conditional Rendering Patterns & Pitfalls
Master conditional rendering in React. Compare logical AND (&&), ternary operators, and if/else conditions. Learn how to prevent common rendering bugs.
React Context API Interview Questions
Master React Context API with practical state management interview examples and best practices. Learn how Context works, when to use it, performance considerations, and common React interview questions.
Controlled vs Uncontrolled Components Interview Questions
Master React Controlled vs Uncontrolled Components interview questions with practical form handling examples. Learn how React manages form state, performance tradeoffs, refs, and best practices.
React: How and When to Write Custom Hooks
Learn when to extract logic into custom React hooks, how hooks share state logic but not state instance, and guidelines for designing clean custom hook interfaces.
React: How Error Boundaries Work
Understand how Error Boundaries catch rendering errors in React, when they fail to catch errors (asynchronous code, event handlers), and how fallback UIs are rendered.
React 19 Actions and useActionState
Learn how React 19 simplifies form handling, pending states, and error handling natively using Actions and the new useActionState hook.
React Compiler (React 19 Auto-Memoization)
Understand the React Compiler (React Forget) in React 19. Learn how it automates memoization, the under-the-hood rules it enforces, and how it reduces user dependency on useMemo and useCallback.