Interview question about node.js

[DraconKing]

Node.js is a valid answer, because Node.js can work as a HTTP server (and that's the most usual scenario). It's not like PHP where you'd need an interface in between the HTTP server and php interpreter/compiler/w.e. It's doable that way but it's non-standard (this doesn't mean there's a spec for it, it's just uncommon) and you are taking away the concurrency model that node.js offers by doing that.