React.js Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

React.js Interview Questions

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How is react.js different from other javascript frameworks?

441

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

384

What is the difference between flux vs mvc?

447

How to use forms in reactjs? Give an example of using forms in reactjs by developing a user registration form?

361

What kind of tools might you use in the build steps to optimize the compiled output of the react code?

527

What are the benefits of using react.js?

454

What are react component lifecycle methods?

442

When would you use setstate() and forceupdate()?

329

What are the advantages and disadvantages of using react components?

463

How to set up routing in reactjs?

419

How might react handle or restrict props to certain types, or require certain props to exist?

403

What is the difference between various react component lifecycle methods?

451

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

403

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

357

Have you used html while working with react.js?

367

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Un-Answered Questions { React.js }

How is react different from angular?

419

What is the lifecycle methods order in mounting?

372

What are refs used for in React?

377

What is the main difference between createElement and cloneElment?

413

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

373

What is a state in react and how is it used?

413

What is render() in React? And explain its purpose?

457

What are controlled and uncontrolled components?

386

Explain the term reconciliation?

358

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

382

what are the limitations of react?

549

What are synthetic events?

368

What is the purpose of render() in react?

411

What are higher order components(hoc)?

434

Please explain step by step approach on how to setup environment for reactjs?

371

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