React.js Interview Questions
Questions Answers Views Company eMail

What can you do with hoc?

248

What is the use of a super keyword in React?

253

State the main difference between Pros and State?

298

How Virtual-DOM is more efficient than Dirty checking?

317

Explain the use of the arrow function in React

271

What is meant by callback function? What is its purpose?

276

What are controlled and uncontrolled components in React?

243

Is setState() is async? Why is setState() in React Async instead of Sync?

271

Explain yield catchphrase in JavaScript

288

What is an Action? How do you describe an Action?

288

What kind of information controls a segment in React?

414

What is the difference between using constructor vs getInitialState in React?

291

How can you update state in react js?

315

Explain pure components in React js?

254

What is one of the core types in react?

250


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Un-Answered Questions { React.js }

What are Props in react js?

287


why can’t browsers read jsx?

269


What are synthetic events in react?

269


Name two types of React component?

266


Explain flux?

307


What is React.PropTypes?

278


What is arrow function in react?

287


What do you know about controlled and uncontrolled components?

259


What are the different phases of react component’s lifecycle?

391


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

250


Explain React Router

266


Explain the term high order component

254


How it is different from other front end language?

231


What is the difference between npm & npx?

337


What is the difference between react components in es5 and es6?

277