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?

421

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

507

What are the pros and cons of using React?

431

What is JSX?

402

What is React.createClass?

421

What is React.createElement?

454

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

522

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

460

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

449

What is the difference between state and props?

449

Name the different React lifecycle methods.

492

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

564

What are controlled components?

409

What are refs used for in React?

420

What is a higher order component?

420

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Un-Answered Questions { React.js }

How do you apply vendor prefixes to inline styles in react?

550

Do you think reactjs has any limitations? If so, tell a few?

467

List some advantages of reactjs?

401

How can we build react in production mode?

394

What are the controlled components and uncontrolled components in reactjs?

440

What is the role of reducer.

441

What is React.PropTypes?

504

Explain the lifecycle methods of react components in detail?

475

Differentiate between states and props.

441

What is flux concept in reactjs?

437

What is lifting state up in react?

419

What are the lifecycle steps of React?

483

How to update a component every second?

493

What is forceUpdate()?

453

What is jsx and how jsx can help applications in react.js?

576

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