What are controlled and uncontrolled components?
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What is a state in react?
How Virtual-DOM is more efficient than Dirty checking?
How different is react’s es6 syntax when compared to es5?
How are actions defined in redux?
How to pass a parameter to an event handler or callback?
Explain error boundaries?
State the difference between getIntialState() and constructor()?
When reactjs released?
Why do we need a router in react?
What is low-level component lifecycle in react.js?
What is PureComponent? When to use PureComponent over Component?
Why is react so popular?