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?

399

What is the difference between reactjs and angularjs?

419

How can we build react in production mode?

390

What is “forward refs”?

423

What is the difference between createelement and cloneelement?

504

What is the differnece between real dom and virtual dom?

433

What is meant by pooling?

439

What is the purpose of render() in react?

439

What are arrow functions? How are they used?

422

What are controlled and uncontrolled components?

419

How it is different from other front end language?

386

What is function based component?

429

How do you embed two components in one component?

369

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

503

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

394

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Un-Answered Questions { React.js }

How do you create an event in react?

450

What is ‘create-react-app’?

419

How is flux different from redux?

437

What is the difference between reactjs and angularjs?

419

What is an action in Redux?

418

In which lifecycle event do you make ajax requests and why?

422

What is a router in react.js?

424

Explain react hooks?

419

What is the difference between setstate() and forceupdate()?

409

When reactjs released?

431

What is the use of arrow function in reactjs?

439

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

388

How Virtual-DOM is more efficient than Dirty checking?

472

Explain various flux elements including action, dispatcher, store and view. Give a simple practical example of installing and using flux in an application?

390

Does React use HTML?

491

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