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?

467

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 }

Explain the use of the arrow function in React

404

Explain what is CSS-in-JS pattern?

403

Does React use HTML?

463

What is the significance of refs in react?

372

Name the important features of React

377

What is react.js? How is it different from other javascript frameworks?

437

What are controlled and uncontrolled components in React?

367

How react router is different from history library?

507

What is reactjs-jsx?

383

What is the life cycle of reactjs components?

374

What is React.createElement?

417

What is redux and flux?

394

How do you tell react to build in production mode and what will that do?

427

How can you embed two or more components into one?

364

How to use https instead of http in create-react-app?

449

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