This is no longer really about FizzBuzz At this point, we are not talking about a simple number generator, and if we ask people to pretend it's a "typical" enterprise web application, we can continue to talk with an applicant about what they know. Nothing runs in a vacuum Even with properly running FizzBuzz code, you still need to deploy it. A simple deployment would look something like this: It's not a good idea to directly expose your application server, so a more limited device like a firewall, load balancer and a reverse proxy server in some combination generally sits in front of an application. Almost all enterprise applications will also need to store the results of their processing somewhere - otherwise why did we build this? A cloud and an on premise deployment have the some functionality. At the heart of it, they differ in Who runs the component (vendor, customer or shared) What it's called Run in the face of adversity An applicant should also be able...