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 the main difference between createElement and cloneElment?

364

What is the main goal of react fiber?

314

Why do you need to use props.children?

317

What are reacted portals?

331

Explain the meaning of Mounting and Demounting

313

What is the purpose of using bindActionsCreators?

341

How can a browser read JSX file?

339

What is the reduction?

291

What is REFS in React

316

What is the use of Webpack?

332

State the difference between getIntialState() and constructor()?

299

What is react fiber?

353

How to pass a parameter to an event handler or callback?

382

Can you update the values of props?

348

Explain the term reconciliation?

312

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Un-Answered Questions { React.js }

What is the difference between super() and super(props)?

402

Does React use HTML?

406

What is the significance of refs in react?

332

How react router is different from history library?

444

What are the three principles that redux follows?

353

Explain pure components in React js?

334

What are the advantages of using jsx?

369

What is flux?

320

What are refs in reactjs? When to use it.

352

What is react intl?

531

Explain the difference between functional and class components.

323

How to set focus in reactjs?

345

What are the key benefits of reactjs development?

367

Explain the purpose of render() in react.

342

What is a router in react.js?

348

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