React.js Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

React.js Interview Questions

Questions Answers Views Company eMail

How react component lifecycle methods help in building interfaces?

510

What is shouldcomponentupdate and when is used in react.js?

435

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

473

Explain step by step approach on how to setup environment for reactjs?

397

What are components in reactjs? Explain the component lifecycle with the help of a diagram explaining each component method in detail. Also, give an example of both stateless and stateful components with source code?

427

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

394

Which feature can we use to cause a component to render only when its id changes?

580

What is redux and flux?

437

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

412

Explain lifecycle of a react component?

445

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

434

How to set up routing in reactjs. Explain with the help of step by step approach?

381

What is a router in react.js?

424

Please explain step by step approach on how to setup environment for reactjs?

404

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

483

Post New React.js Questions

Un-Answered Questions { React.js }

What is shouldcomponentupdate and when is used in react.js?

435

What are the advantages of redux?

451

Why you can’t update props in react?

448

Can a developer create animations in React?

452

How do you modularize code in react?

436

What are pure components?

386

Explain the purpose of render() in react.

413

How react component lifecycle methods help in building interfaces?

510

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

418

What is the differnece between real dom and virtual dom?

433

What are pure functional components?

423

Have you used html while working with react.js?

408

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

422

State the difference between React JS and React Native

580

Give an example of both stateless and stateful components with source code?

453

For More Un-Answered { React.js } Questions Click Here