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 forceUpdate()?

1 497

What are the lifecycle steps of React?

1 532

What is render() in React? And explain its purpose?

1 539

What is Redux?

1 470

How do you do type check in ReactJS?

1 532

Explain the Presentational segment

1 554

Does React re-render all components and sub components every time setState is called?

1 505

Why do we need a router in react?

1 482

What is SyntheticEvent?

1 464

What is the difference between npm & npx?

1 567

Explain the term high order component

1 467

Explain synthetic event in React js?

1 491

Explain the components of Redux?

1 489

What is PureComponent? When to use PureComponent over Component?

1 521

Is it possible to nest jsx elements into other jsx elements?

1 463

Un-Answered Questions { React.js }

How would you create higher order components (hocs) in react.js?

448

How to use events in reactjs? Give an example of using events?

565

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