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?

400

What is the difference between reactjs and angularjs?

419

How can we build react in production mode?

390

What is “forward refs”?

423

What is the difference between createelement and cloneelement?

508

What is the differnece between real dom and virtual dom?

433

What is meant by pooling?

440

What is the purpose of render() in react?

439

What are arrow functions? How are they used?

424

What are controlled and uncontrolled components?

421

How it is different from other front end language?

387

What is function based component?

429

How do you embed two components in one component?

369

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

504

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

399

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Un-Answered Questions { React.js }

Explain dom diffing?

416

Explain the different phases of react component’s lifecycle?

410

Explain life cycle of react js component?

382

What is the difference between createelement and cloneelement?

508

When rendering a list what is a key and what is it's purpose?

412

What is REFS in React

397

How to use events in reactjs?

417

What is the difference between react components extend, createclass and mixins, hocs?

394

Explain various flux elements including action, dispatcher, store and view. Give a simple practical example of installing and using flux in an application?

390

What is React.cloneElement? And the difference with this.props.children?

421

Differentiate between stateful and stateless components?

412

What is the difference between real dom and virtual dom.

459

Which is better angular or react js?

421

What is ComponentWillMount()?

573

Why are browsers unable to read jsx?

448

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