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 ‘Store’ feature in Redux?

354

How to dispatch the data in-store?

433

What is the use of React.Children.map(props.children, () => )?

394

List down some of the methods in a react-dom package

368

What are the popular animation package in React ecosystem?

418

How can we do server-side rendering in React?

431

Can you update props in react?

430

What is Babel in React js?

390

What is the purpose of callback function as an argument of setstate()?

441

How to build the React app for production?

424

What is ComponentWillMount()?

531

Explain react hooks?

377

What is the difference between shadow dom and virtual dom?

478

Explain error boundaries?

383

List some of the major advantages of react?

409

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Un-Answered Questions { React.js }

What is the difference between React Component and React Element?

461

Is it possible to use async/await in plain react?

372

How react router and its techniques differ from more traditional javascript routers like backbone’s router?

564

What is a state in react?

405

What is the difference between flux vs mvc?

447

What are controlled and uncontrolled components?

386

What is React.createElement?

420

What are the differences between controlled and uncontrolled components?

366

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

366

What is refs?

491

What is React State?

465

Does React re-render all components and sub components every time setState is called?

431

Explain the advantages of redux?

360

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

391

Which is best react or angular?

366

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