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?

473

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

408

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

438

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

356

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?

385

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

364

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

546

What is redux and flux?

394

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

375

Explain lifecycle of a react component?

405

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

396

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

345

What is a router in react.js?

388

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

371

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

431

Post New React.js Questions

Un-Answered Questions { React.js }

What is a router in react.js?

388

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

379

What do you understand by mixin or higher order components in reactjs?

341

List down some of the methods in a react-dom package

368

What is ‘create-react-app’?

391

What are the components of redux.

372

Enlist the advantages and disadvantages of reactjs?

410

What is a state in react and how is it used?

413

How do you modularize code in react?

398

What are the lifecycle methods going to be deprecated in react v16?

391

What is the difference between a function in setState or passing an object?

378

What are refs used for in React?

377

What is the difference between reactjs and angularjs?

384

What is meant by pooling?

411

What is the use of ‘prop-types’ library?

452

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