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React.js Interview Questions
Questions Answers Views Company eMail

How do you pass data from child to parent component?

419

How do you this in constructor?

378

When rendering a list what is a key and what is it's purpose?

352

What's the difference between super() and super(props) in React when using ES6 classes?

495

What is Children?

348

How is react different?

407

Why reactjs is used?

369

What are the features of react?

382

How reactjs framework is different as compared to others?

374

How is react different from angular?

411

What is the lifecycle methods order in mounting?

370

What are higher order components(hoc)?

430

What are the advantages of redux?

406

How to update a component every second?

434

What do you understand with the term polling?

399


Post New React.js Questions

Un-Answered Questions { React.js }

What is React.cloneElement? And the difference with this.props.children?

387


When would you use setstate() and forceupdate()?

319


What is the lifecycle methods order in mounting?

370


Show how the data flows through redux?

357


What are synthetic events in react?

397


What are the differences between a class component and functional component?

403


How do you tell react to build in production mode and what will that do?

422


How can you embed two or more components into one?

360


How to embed two components in one component?

389


Differentiate between real dom and virtual dom?

331


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

472


In which lifecycle event do you make ajax requests and why?

391


What is current stable version of reactjs?

534


Explain react hooks?

366


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

452