React.js Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

React.js Interview Questions

Questions Answers Views Company eMail

Explain what is CSS-in-JS pattern?

403

What is the difference between super() and super(props)?

453

Is it possible in React to call the Child method from Parent?

402

Can a developer create animations in React?

414

How can I make an AJAX call?

444

What is React.PropTypes?

457

Name two types of React component?

427

What are Props in react js?

414

What a setState is doing?

498

What is the difference between a function in setState or passing an object?

378

Can you force a React component to rerender without calling setState?

393

What is Redux Thunk used for?

403

Difference between constructor and getInitialState ?

403

Do you need to use ES6 (+) with React?

413

What is React State?

464

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Un-Answered Questions { React.js }

What is reactjs-jsx? What are the advantages of using jsx? Explain basic code snippet of jsx with the help of a practical example?

358

What is controllable component in reactjs?

399

What is the use of React.Children.map(props.children, () => )?

394

What are controlled components?

362

What are the key benefits of reactjs development?

414

Which feature can we use to cause a component to render only when its id changes?

546

List down the advantages of react router?

420

What is function based component?

398

What is a state in react?

404

Explain the advantages of redux?

358

How is react router different from conventional routing?

577

How to build the React app for production?

424

What are arrow functions? How are they used?

384

What is the difference between createelement and cloneelement?

461

When reactjs released?

397

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