01What is the computational complexity of React's heuristic diffing algorithm?
02What is the return value of the `React.createElement()` API?
03Which phase of the React lifecycle is responsible for calculating the difference between the current and new VDOM trees?
04What happens if you render two adjacent elements in JSX without a Fragment or parent container?
05In the context of VDOM diffing, what is the 'Key Selector'?