Answer : ReactJS divides the UI into isolated reusable pieces of code known as components. React components work similarly to JavaScript functions as they accept arbitrary inputs called properties or props. It's possible to have as many components as necessary without cluttering your code

Answer : Props are used to pass data from one component to another. The state is a local data storage that is local to the component only and cannot be passed to other components.

Answer :
The useEffect Hook
1. Side Effect Runs After Every Render
2. Side Effect Runs Only Once After Initial Render
3. Side Effect Runs After State Value Changes
4. Side Effect Runs After Props Value Change
5. Side Effect Runs After Props and State Value Change
6. Side EffectCleanup