Q1: What is the difference between synchronous and asynchronous web methods Give an example of synchronous and asynchronous web methods

Q1: What is the difference between synchronous and asynchronous web methods? Give an example of synchronous and asynchronous web methods? Is it possible to transform a synchronous web method to asynchronous web methods? If yes, state how?
Q2: Content proxy is a web service on your server that can fetch data from external URLs and return it to the browser. How does the proxy improve the load time for users?
Q3: What are the advantages and disadvantages of using HTTP POST for web service calls?