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

React.js Interview Questions

Questions Answers Views Company eMail

What is React?

415

How React works? How Virtual-DOM works in React?

504

What are the pros and cons of using React?

423

What is JSX?

399

What is React.createClass?

415

What is React.createElement?

450

What is ReactDOM and what is the difference between ReactDOM and React?

516

What is the difference between a Presentational component and a Container component?

450

What are the differences between a class component and functional component?

441

What is the difference between state and props?

442

Name the different React lifecycle methods.

484

Where in a React component should you make an AJAX request?

558

What are controlled components?

403

What are refs used for in React?

414

What is a higher order component?

411

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Un-Answered Questions { React.js }

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

491

What is uncontrollable component in reactjs?

438

Which is better angular or react js?

421

How can you share an element in the parsing?

434

What is ‘create-react-app’?

419

What are refs in reactjs?

416

Explain what is CSS-in-JS pattern?

438

What is the difference between React Native and React?

482

How is react different from angular?

455

Why are browsers unable to read jsx?

448

What is the main goal of react fiber?

393

What are arrow functions?

399

Explain step by step approach on how to setup environment for reactjs?

397

What is the significance of keys in react?

590

What is the difference between element and component?

616

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