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 the differences in between real dom and virtual dom?

430

What are the differentiate between stateful and stateless components?

391

What is uncontrollable component in reactjs?

362

How to update the state of the component in reactjs?

357

What are the components in flux architecture?

347

What is difference between setstate and forceupdate () and finddomnode () in reactjs?

329

What is repository url of reactjs?

366

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

351

Is it possible to display props on a parent component?

354

What is higher order components (hoc)?

339

How to use loop in reactjs?

400

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

317

What are refs in react and why are they important?

326

What are refs in reactjs?

322

What is the use of arrow function in reactjs?

364

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Un-Answered Questions { React.js }

What is meant by callback function? What is its purpose?

350

What is arrow function in react?

390

What is the reduction?

291

What do you understand with the term polling?

361

Explain dom diffing?

338

What is flux?

320

What is the use of react-dom package?

372

Why do we need a router in react?

375

What are the popular react-specific linters?

325

What are the lifecycle methods going to be deprecated in react v16?

357

What is SyntheticEvent?

336

What are the advantages of reactjs?

342

What is the difference between function based component and class based component?

384

What is React.PropTypes?

401

What are controlled and uncontrolled components in React?

316

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