React.js Interview Questions
Questions Answers Views Company eMail

What is React?

21

How React works? How Virtual-DOM works in React?

25

What are the pros and cons of using React?

23




What is JSX?

5

What is React.createClass?

21

What is React.createElement?

29

What is ReactDOM and what is the difference between ReactDOM and React?

5

What is the difference between a Presentational component and a Container component?

21




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

5

What is the difference between state and props?

13

Name the different React lifecycle methods.

5

Where in a React component should you make an AJAX request?

25

What are controlled components?

7

What are refs used for in React?

5

What is a higher order component?

5


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Un-Answered Questions { React.js }

What is low-level component lifecycle in react.js?

3


What are pure functional components?

7


What are the differences between controlled and uncontrolled components?

5


What is flux?

11


What is React.PropTypes?

15






What is the difference between react components in es5 and es6?

3


How events are different in react?

29


How will be you able to handle more action using redux?

5


what is the usage of refs and keys used in react?

42


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?

3


What is shouldcomponentupdate and when is used in react.js?

3


What are reacted portals?

5


What are the components of redux.

3


What are the feature of reactjs?

11


What are pure components?

5