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 forceUpdate()?

288

What are the lifecycle steps of React?

267

What is render() in React? And explain its purpose?

317

What is Redux?

262

How do you do type check in ReactJS?

304

Explain the Presentational segment

326

Does React re-render all components and sub components every time setState is called?

286

Why do we need a router in react?

291

What is SyntheticEvent?

269

What is the difference between npm & npx?

331

Explain the term high order component

250

Explain synthetic event in React js?

278

Explain the components of Redux?

290

What is PureComponent? When to use PureComponent over Component?

289

Is it possible to nest jsx elements into other jsx elements?

275

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Un-Answered Questions { React.js }

What is React.PropTypes?

270

Give me two most significant drawbacks of React?

242

What are features of react.js?

235

What are controlled and uncontrolled components?

268

Why should I use react js?

238

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

258

What are components in reactjs?

272

What is controllable component in reactjs?

236

What is redux and flux? When do you use them?

257

What are the feature of reactjs?

374

What is React.createElement?

282

What is a router in react.js?

243

How to embed two components in one component?

273

What is the Current Stable Version of React?

252

What is shouldcomponentupdate and when is used in react.js?

261

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