React Interview Prep Tips
Expect questions on: What is JSX? Virtual DOM? Props vs state? Why keys? Rules of hooks? Controlled inputs? Difference between useEffect and useLayoutEffect?
Core concepts interviewers ask
Expect questions on: What is JSX? Virtual DOM? Props vs state? Why keys? Rules of hooks? Controlled inputs? Difference between useEffect and useLayoutEffect?
Real-life example: Interviews are oral exams — they check if you can explain ideas simply, not only copy code from tutorials.
- Virtual DOM — lightweight copy; diff then patch real DOM
- Props down, events up — one-way data flow
- Keys — stable identity for list items
- useEffect cleanup — avoid memory leaks and stale updates
Common coding tasks
Build a counter, todo list, fetch-and-display list, debounced search, or simple form validation. Practice without copy-paste first, then check answers.
Real-life example: Coding tasks are driving tests — examiner watches you park (structure), not just whether the car moves.
- Todo: add, toggle, delete with immutable state
- Fetch: loading, error, empty, success UI states
- Modal: conditional render or portal
Practice on Rishtaara
Use MCQs for quick recall and interview Q&A for speaking practice out loud.
Real-life example: MCQs are flashcards. Interview pages are mock conversations with a friend before the real meeting.
- MCQ practice: /mcq/react-mcq
- Interview prep: /interview/react-interview
- Full guide: /knowledge/react-complete-guide
- Next course: Tailwind CSS — /learn/web-development/tailwind-css-fundamentals