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 are arrow functions?

366

What is the difference between reactjs and angularjs?

384

How can we build react in production mode?

360

What is “forward refs”?

383

What is the difference between createelement and cloneelement?

462

What is the differnece between real dom and virtual dom?

389

What is meant by pooling?

411

What is the purpose of render() in react?

411

What are arrow functions? How are they used?

384

What are controlled and uncontrolled components?

386

How it is different from other front end language?

354

What is function based component?

400

How do you embed two components in one component?

337

What is low-level component lifecycle in react.js?

438

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

363

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Un-Answered Questions { React.js }

Which is better angular or react js?

389

What can you do if the expression contains more than one line?

369

What are the components in flux architecture?

399

What is React.createElement?

420

Why you can’t update props in react?

406

Differentiate between states and props.

401

What are the methods called when component is created or while inserting it to dom?

360

How do you tell react to build in production mode and what will that do?

427

How to use https instead of http in create-react-app?

456

What is the use of empty tags <> ?

389

What are the advantages of using jsx?

419

List some of the major advantages of react?

409

What are the benefits of using react.js?

456

How to set focus in reactjs?

378

Explain the Presentational segment

484

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