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 an event in react?

272

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

252

How do you tell react to build in production mode and what will that do?

278

How to use https instead of http in create-react-app?

257

How events are different in react?

283

What is react intl?

449

What are the three principles that redux follows?

289

What do you understand by “single source of truth”?

242

What is the significance of keys in react?

340

What are pure components?

230

What is arrow function in react?

283

How react router is different from history library?

301

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

248

Differentiate between stateful and stateless components?

234

What were the major problems with mvc framework?

295

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Un-Answered Questions { React.js }

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

260

What is Babel in React js?

259

How can you spill the reducers?

714

How to update a component every second?

317

What is arrow function in react?

283

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

247

What are synthetic events in react?

262

What are refs used for in React?

262

What is Children?

235

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

299

What are synthetic events?

228

Why is it necessary to capitalize component names?

262

How can a browser read JSX file?

276

What is the purpose of render() function in reactjs?

250

Why do you need to use props.children?

242

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