This may sound like a weird question but I will give it a shot anyway. What is the Architecture behind Stack Overflow?
We are a bunch of developers and had a bit of a discussion as to what is the Architecture/technology behind this great invention. :)
Some guess with technology is ASP.NET MVC may be MySQL db, but we could be wrong.
Have a look here: https://blog.stackoverflow.com/2008/09/what-was-stack-overflow-built-with/ or here: http://blog.serverfault.com/post/stack-exchanges-architecture-in-bullet-points/