React.js Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

React.js Interview Questions

Questions Answers Views Company eMail

How do you pass data from child to parent component?

266

How do you this in constructor?

259

When rendering a list what is a key and what is it's purpose?

248

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

285

What is Children?

235

How is react different?

286

Why reactjs is used?

251

What are the features of react?

283

How reactjs framework is different as compared to others?

249

How is react different from angular?

286

What is the lifecycle methods order in mounting?

257

What are higher order components(hoc)?

282

What are the advantages of redux?

270

How to update a component every second?

310

What do you understand with the term polling?

264

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Un-Answered Questions { React.js }

Explain basic code snippet of jsx with the help of a practical example?

249

Explain life cycle of react js component?

223

What are controlled components?

245

What is react router?

265

What is the use of arrow function in reactjs?

248

Show how the data flows through redux?

241

How is reactjs different from angular and vue js?

264

How do you embed two components in one component?

216

What is the use of a super keyword in React?

247

What is the difference between real dom and virtual dom.

277

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

280

What is JSX?

249

What is the difference between setstate() and forceupdate()?

248

What are the popular animation package in React ecosystem?

298

How state is useful for react?

241

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