Questions and answers

Here are some questions and answers to refresh your knowledge:

1. What is useState?

   The useState hook is a built-in hook in React that allows you to define a state within a functional component and dispatch an action to change it.

2. What is the most common use of useState?

   The useState hook is probably the most common hook in the React hook family. Whenever you need a variable to change UI elements, you can normally resort to useState to accomplish this. Touching a widget, clicking a vote-up button, hovering over an icon, toggling a checkbox, and much more can be implemented with the use of useState.