Add JSX and react data flow questions

Author: sudheerj

README.md

@@ -324,6 +324,8 @@
 |308| [How do you access imperative API of web components?](#how-do-you-access-imperative-api-of-web-components)|
 |309| [What is formik?](#what-is-formik)|
 |310| [What are typical middleware choices for handling asynchronous calls in Redux?](#what-are-typical-middleware-choices-for-handling-asynchronous-calls-in-redux)|
+|311| [Is browsers understand JSX code?](#is-browsers-understand-jsx-code)|
+|312| [Describe about data flow in react?](#describe-about-data-flow-in-react)|
 
 ## Core React
 
@@ -5109,3 +5111,7 @@
 
 310. ### What are typical middleware choices for handling asynchronous calls in Redux?
      Some of the popular middleware choices for handling asynchronous calls in Redux eco system are `Redux Thunk, Redux Promise, Redux Saga`.
+311. ### Is browsers understand JSX code?
+     No, browsers can't understand JSX code. You need a transpiler to convert your JSX to regular Javascript that browsers can understand. The most widely used transpiler right now is Babel.
+312. ### Describe about data flow in react?
+     React implements one-way reactive data flow using props which reduce boilerplate and is easier to understand than traditional two-way data binding.