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 high-level component lifecycle in react.js?

515

What are state and props in reactjs? What is the difference between the two? Give a proper example of using state and props to elaborate the concept with complete source code?

441

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

409

What are pure functional components?

423

What is the difference between angularjs vs react.js?

519

What is the difference between an element and a component in react?

483

How to use events in reactjs? Give an example of using events?

513

Can you explain about the standard javascript toolchain, transpilation, jsx?

411

How to apply validation on props in reactjs? Apply validation in previously developed example in above question?

422

What is reactjs-jsx? What are the advantages of using jsx?

444

What is the difference between react components in es5 and es6?

433

How would you create higher order components (hocs) in react.js?

417

Explain about the standard javascript toolchain, transpilation, jsx?

414

What is the significance of refs in react?

422

What is flux in react.js?

493

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Un-Answered Questions { React.js }

How can a browser read JSX file?

425

What is the use of Webpack?

406

What is flux in react.js?

493

What is controllable component in reactjs?

444

What is reactjs-jsx?

419

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

390

What are state and props in reactjs? What is the difference between the two?

483

How is redux different from flux?

450

How to apply validation on props in reactjs? Apply validation in previously developed example in above question?

422

Why reactjs is used?

409

Explain the term synthetic events?

574

What are refs in react and why are they important?

412

What can you do with hoc?

420

What is the difference between states and props.

435

How would you create higher order components (hocs) in react.js?

417

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