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?

532

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?

400

Differentiate between states and props.

400

Explain the purpose of render() in react.

387

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?

392

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 are the life cycle of reactjs?

383

How to use https instead of http in create-react-app?

448

Give an example of both stateless and stateful components with source code?

415

What is component in reactjs?

482

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

409

How can you embed two or more components into one?

364

What is “forward refs”?

381

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

356

What is the difference between function based component and class based component?

433

Can you update the values of props?

384

What is the lifecycle methods order in mounting?

372

What are the lifecycle methods going to be deprecated in react v16?

391

What is a higher order component?

380

What are the popular react-specific linters?

373

What is the difference between state and props?

405

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