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React.js Interview Questions
Questions Answers Views Company eMail

What is React?

76

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

97

What are the pros and cons of using React?

76

What is JSX?

67

What is React.createClass?

77

What is React.createElement?

92

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

114

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

77

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

73

What is the difference between state and props?

74

Name the different React lifecycle methods.

73

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

102

What are controlled components?

65

What are refs used for in React?

62

What is a higher order component?

63


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Un-Answered Questions { React.js }

What is the difference between state and props?

74


What do you understand by refs in react?

62


How to update a component every second?

100


What is React.createElement?

92


What are the components in flux architecture?

66






What is reactjs-jsx? What are the advantages of using jsx? Explain basic code snippet of jsx with the help of a practical example?

65


What are the three principles that redux follows?

106


How arrow function is used in react?

63


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

54


In what cases would you use a class component over a functional component?

71


When was React first released?

72


List some advantages of reactjs?

69


Explain the different phases of react component’s lifecycle?

60


What are pure functional components?

71


How to embed two components in one component?

77