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?

343

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

443

What are the pros and cons of using React?

358

What is JSX?

330

What is React.createClass?

347

What is React.createElement?

380

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

436

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

368

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

369

What is the difference between state and props?

374

Name the different React lifecycle methods.

398

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

472

What are controlled components?

327

What are refs used for in React?

348

What is a higher order component?

349

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Un-Answered Questions { React.js }

What are the popular libraries used for flux?

478

When reactjs released?

355

Define the term Redux in React

372

What is PureComponent? When to use PureComponent over Component?

415

What is the purpose of render() function in reactjs?

372

Differentiate between stateful and stateless components?

342

What are components in reactjs?

355

What is the purpose of push() and replace() methods of history?

391

Does React use HTML?

421

What are the difference between pros and state?

411

Explain the term ‘Restructuring.’

321

What is arrow function in react? How is it used?

388

What is the purpose of render method of react-dom?

366

How is react different from angular?

379

What is Redux?

344

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