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 is React?

259

How React works? How Virtual-DOM works in React?

333

What are the pros and cons of using React?

261

What is JSX?

245

What is React.createClass?

257

What is React.createElement?

278

What is ReactDOM and what is the difference between ReactDOM and React?

320

What is the difference between a Presentational component and a Container component?

259

What are the differences between a class component and functional component?

254

What is the difference between state and props?

263

Name the different React lifecycle methods.

295

Where in a React component should you make an AJAX request?

287

What are controlled components?

245

What are refs used for in React?

255

What is a higher order component?

261

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Un-Answered Questions { React.js }

How it is different from other front end language?

223

What is Context?

256

Is it possible to use async/await in plain react?

246

What are the purpose of render() in react?

241

What is the difference between angularjs vs react.js?

281

What are the advantages and disadvantages of using react components?

255

What are reacted portals?

246

What are features of react.js?

235

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

301

What is function based component?

242

Why react js is faster?

238

What is the Current Stable Version of React?

247

How to pass a parameter to an event handler or callback?

280

Which is best react or angular?

226

What is the difference between element and component?

353

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