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 portals in react?

430

How are actions defined in redux?

400

List down the components of redux?

388

What are the popular packages for animation?

409

Why you can’t update props in react?

360

How can we find the version of react at runtime in the browser?

560

What is the purpose of push() and replace() methods of history?

384

What is the use of react-dom package?

372

What are the different phases of react component’s lifecycle?

513

What are fragments?

426

How do you apply vendor prefixes to inline styles in react?

446

Explain the lifecycle methods of react components in detail?

372

What is the recommended way for naming components?

345

What are the popular react-specific linters?

325

How to enable production mode in react?

419

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Un-Answered Questions { React.js }

What is arrow function in react?

390

What are controlled and uncontrolled components?

343

Why is switch keyword used in react router v4?

326

What is React.createElement?

371

List some features of reactjs?

304

How do you do type check in ReactJS?

415

What is Redux Thunk used for?

364

Ho can you re-render a component without using setState() function?

379

What is the purpose of using bindActionsCreators?

341

How to update the state of the component in reactjs?

357

How is react.js different from other javascript frameworks?

387

What is redux and flux?

340

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?

343

What is the use of Webpack?

332

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

319

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