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?

409

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?

358

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

337

What are pure functional components?

332

What is the difference between angularjs vs react.js?

442

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

391

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

424

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

331

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

348

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

358

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

354

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

312

Explain about the standard javascript toolchain, transpilation, jsx?

329

What is the significance of refs in react?

332

What is flux in react.js?

422

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Un-Answered Questions { React.js }

Explain the role of reducer?

361

Is setState() is async? Why is setState() in React Async instead of Sync?

362

Explain pure components in React js?

333

What is unidirectional data flow? How does data flow happening in Redux?

355

What is the Current Stable Version of React?

375

What is Redux Thunk used for?

364

Why should I use react js?

323

What are the limitations of reactjs?

482

What is JSX?

323

What is React State?

417

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?

358

Explain the lifecycle methods of react components in detail?

372

What are refs in reactjs?

322

What is flux in react.js?

422

How can you update the state of a component?

331

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