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 can you do with hoc?

345

What is the use of a super keyword in React?

324

State the main difference between Pros and State?

430

How Virtual-DOM is more efficient than Dirty checking?

396

Explain the use of the arrow function in React

365

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

350

What are controlled and uncontrolled components in React?

316

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

362

Explain yield catchphrase in JavaScript

359

What is an Action? How do you describe an Action?

476

What kind of information controls a segment in React?

629

What is the difference between using constructor vs getInitialState in React?

421

How can you update state in react js?

424

Explain pure components in React js?

333

What is one of the core types in react?

364

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Un-Answered Questions { React.js }

How can a browser read JSX file?

339

How to set state with a dynamic key name?

376

Name the important features of React

336

What are the popular animation package in React ecosystem?

377

What is high-level component lifecycle in react.js?

409

How is redux different from flux?

369

What is the difference between reactjs and angularjs?

343

Is it possible in React to call the Child method from Parent?

355

How is react.js different from other javascript frameworks?

387

What is the difference between the state and props in reactjs?

385

What is the ‘Store’ feature in Redux?

322

What is the difference between dom and virtual dom in reactjs?

456

When would you use a class component over a functional component?

345

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

336

What a setState is doing?

427

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