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 are arrow functions?

365

What is the difference between reactjs and angularjs?

380

How can we build react in production mode?

360

What is “forward refs”?

381

What is the difference between createelement and cloneelement?

459

What is the differnece between real dom and virtual dom?

381

What is meant by pooling?

411

What is the purpose of render() in react?

411

What are arrow functions? How are they used?

384

What are controlled and uncontrolled components?

386

How it is different from other front end language?

353

What is function based component?

394

How do you embed two components in one component?

336

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

437

What is reactjs-jsx? What are the advantages of using jsx? Explain basic code snippet of jsx with the help of a practical example?

357

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Un-Answered Questions { React.js }

Can you explain about the standard javascript toolchain, transpilation, jsx?

368

How are actions defined in redux?

444

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

355

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

480

What is redux and flux? When do you use them?

403

What are keys in reactjs and why are they important?

428

How will be you able to handle more action using redux?

389

Why are browsers unable to read jsx?

411

What is the difference between function based component and class based component?

433

What is the lifecycle methods order in mounting?

372

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

409

What were the major problems with mvc framework?

473

List some features of reactjs?

352

How events are different in react?

434

Explain the difference between functional and class components.

370

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