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 jsx and how jsx can help applications in react.js?

534

How react router and its techniques differ from more traditional javascript routers like backbone’s router?

563

What are features of react.js?

377

Show how the data flows through redux?

367

How are forms created in react?

402

Differentiate between states and props.

400

Explain the purpose of render() in react.

388

What do you understand by refs in react?

361

How can you embed two or more components into one?

364

How do you modularize code in react?

393

How can you update the state of a component?

360

What do you understand by virtual dom? Explain its working.

331

What is arrow function in react? How is it used?

417

What do you understand from “in react, everything is a component.”

379

How different is react’s es6 syntax when compared to es5?

444

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Un-Answered Questions { React.js }

What is lazy loading react?

408

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

377

When would you use a class component over a functional component?

391

What are arrow functions?

365

How react router and its techniques differ from more traditional javascript routers like backbone’s router?

563

What is Context?

375

What is Babel in React js?

389

What is flux concept in reactjs? Explain various flux elements including action, dispatcher, store and view. Give a simple practical example of installing and using flux in an application?

384

State the difference between Real DOM and Virtual DOM?

366

What is the reduction?

330

Do you need to use ES6 (+) with React?

413

How is react different from angular?

419

What is an event in react?

402

What kind of information controls a segment in React?

678

Explain error boundaries?

383

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