What is React.js primarily used for?
React.js is a library written in which programming language?
What is the basic building block of a React application?
What command is used to create a new React project?
What is 'state' in React?
What is the purpose of 'props' in React?
Which method is called after a component is rendered?
What is used to efficiently update the DOM in React?
Which keyword is used to create a class component in React?
