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?

445

How are actions defined in redux?

408

List down the components of redux?

397

What are the popular packages for animation?

417

Why you can’t update props in react?

371

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

577

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

391

What is the use of react-dom package?

386

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

523

What are fragments?

429

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

452

Explain the lifecycle methods of react components in detail?

377

What is the recommended way for naming components?

353

What are the popular react-specific linters?

333

How to enable production mode in react?

431

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Un-Answered Questions { React.js }

Why react js is faster?

336

What are the advantages of react router.

330

Explain pure components in React js?

344

How to apply validation on props in reactjs? Apply validation in previously developed example in above question?

351

What is React.createElement?

380

What is the use of Webpack?

337

Is reactjs a framework?

353

What do you mean by reactjs?

354

What is arrow function in react?

400

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

418

Explain yield catchphrase in JavaScript

364

How can you update the state of a component?

338

what is the usage of refs and keys used in react?

408

What are higher order components(hoc)?

396

How to build the React app for production?

393

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