React quiz

Test your React knowledge with a free interactive quiz — 50 questions with answers and explanations. No signup needed to play.

What is lifting state up in React?

1. What is lifting state up in React?
2. What causes a React component to re-render?
3. How do you conditionally render content in JSX?
4. What is the purpose of `useEffect`?
5. What is the correct way to handle events in React?
6. What hook is used to manage local state in a functional component?
7. What is a React component?
8. What is reconciliation in React?
9. What does the `children` prop represent?
10. What is the virtual DOM in React?
11. What does `ReactDOM.createRoot()` do in React 18?
12. What is a higher-order component (HOC)?

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