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 arrow functions?

246

What is the difference between reactjs and angularjs?

262

How can we build react in production mode?

230

What is “forward refs”?

255

What is the difference between createelement and cloneelement?

257

What is the differnece between real dom and virtual dom?

252

What is meant by pooling?

274

What is the purpose of render() in react?

266

What are arrow functions? How are they used?

278

What are controlled and uncontrolled components?

273

How it is different from other front end language?

231

What is function based component?

259

How do you embed two components in one component?

222

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

250

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

239

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Un-Answered Questions { React.js }

What is an action in Redux?

254

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

239

List some of the cases when you should use refs?

227

How is flux different from redux?

263

Explain the limitations of react?

265

How can you update the state of a component?

246

What is jest?

306

How react component lifecycle methods help in building interfaces?

276

Is it possible to use the word class in jsx?

223

What are the differences between controlled and uncontrolled components?

258

How will be you able to handle more action using redux?

260

What are the advantages of reactjs?

263

What's the difference between super() and super(props) in React when using ES6 classes?

298

What is the difference between npm & npx?

337

State the difference between Real DOM and Virtual DOM?

248

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