Basic React JS Questions:

1. What is React JS?
2. How does React work?
3. What are components in React?
4. What is JSX?
5. How do you create a React component?
6. Explain the virtual DOM.
7. What are props in React?
8. What is state in React?
9. How do you update the state of a component?
10. What are lifecycle methods in React?

Intermediate React JS Questions:

1. What is the difference between state and props?
2. How do you pass data between components?
3. Explain the concept of lifting state up in React.
4. What are higher-order components?
5. How can you prevent components from re-rendering?
6. What is React Router?
7. How do you implement forms in React?
8. What are controlled components?