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?

382

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

479

What are the pros and cons of using React?

385

What is JSX?

356

What is React.createClass?

381

What is React.createElement?

415

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

467

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

414

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

407

What is the difference between state and props?

405

Name the different React lifecycle methods.

444

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

500

What are controlled components?

362

What are refs used for in React?

376

What is a higher order component?

380

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Un-Answered Questions { React.js }

What can you do with hoc?

385

What is the difference between angularjs vs react.js?

492

why can’t browsers read jsx?

379

How to use forms in reactjs?

410

Is setState() is async? Why is setState() in React Async instead of Sync?

409

What is lazy loading react?

408

List some features of reactjs?

352

What are reacted portals?

374

What is the component lifecycle in reactjs?

440

Explain the term stateless components

358

How do you modularize code in react?

392

What are class based component?

367

What can be done when there is more than one line of expression?

488

Explain error boundaries?

383

What is redux and flux? When do you use them?

403

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