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?

385

What is the use of a super keyword in React?

368

State the main difference between Pros and State?

472

How Virtual-DOM is more efficient than Dirty checking?

431

Explain the use of the arrow function in React

404

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

379

What are controlled and uncontrolled components in React?

367

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

409

Explain yield catchphrase in JavaScript

393

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

520

What kind of information controls a segment in React?

678

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

466

How can you update state in react js?

461

Explain pure components in React js?

380

What is one of the core types in react?

404

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Un-Answered Questions { React.js }

How can we find the version of react at runtime in the browser?

610

Can a developer create animations in React?

414

Have you used html while working with react.js?

367

What is the purpose of render() function in reactjs?

414

What is jest?

433

Explain the advantages of redux?

358

What is ComponentWillMount()?

530

How to embed two components in one component?

398

What are the differences in between real dom and virtual dom?

480

What is the virtual dom, and a pragmatic overview of how react renders it to the dom in react.js?

372

How is react.js different from other javascript frameworks?

441

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

402

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

401

What is the difference between stateless and stateful component?

430

List some of the major advantages of react?

409

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