Core concepts: Components, Props, State, JSX, Virtual DOM
What is React?
What is JSX?
What is the Virtual DOM?
What are the key features of React? (Select all that apply)
What are React components?
What is the difference between Functional and Class components?
What are Props in React?
What is State in React?
Which statements about State vs Props are correct? (Select all that apply)
What are Fragments in React used for?
What is the purpose of keys in React lists?
Why should we avoid using array index as keys?
