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?

570

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

605

What are features of react.js?

414

Show how the data flows through redux?

402

How are forms created in react?

444

Differentiate between states and props.

436

Explain the purpose of render() in react.

413

What do you understand by refs in react?

396

How can you embed two or more components into one?

403

How do you modularize code in react?

436

How can you update the state of a component?

396

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

366

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

455

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

412

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

485

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Un-Answered Questions { React.js }

What is the main difference between createElement and cloneElment?

449

What is ‘create-react-app’?

419

What is Context?

405

What is “forward refs”?

423

Why do you need to use props.children?

397

What is the use of arrow function in reactjs?

439

How to set focus in reactjs?

415

Can you update the values of props?

425

Explain the term high order component

425

What is redux and flux?

437

State the difference between getIntialState() and constructor()?

387

What are components in reactjs? Explain the component lifecycle with the help of a diagram explaining each component method in detail. Also, give an example of both stateless and stateful components with source code?

427

What is ComponentWillMount()?

573

What a setState is doing?

533

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

502

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