Add hooks interview questions and answers

Author: sudheerj

README.md

@@ -5027,3 +5027,7 @@
      10. PayPal
 301. ### Is it recommended to use CSS In JS technique in React?
      React does not have any opinion about how styles are defined but if you are a beginner then good starting point is to define your styles in a separate *.css file as usual and refer to them using className. This functionality is not part of React but came from third-party libraries. But If you want to try a different approach(CSS-In-JS) then styled-components library is a good option.
+302. ### Do I need to rewrite all my class components with hooks?
+     No. But you can try Hooks in a few components(or new components) without rewriting any existing code. Because there are no plans to remove classes in ReactJS.
+303. ### How to fetch data with React Hooks?
+