Give a good example of 3-tier architecture?

Question

http://www.codeproject.com/KB/architecture/three_tier_architecture.aspx

Does this website give a good example on 3-tier architecture? I thought it was a good example, but seemed like a few of the 1 star raters actually said that it's not a good practice.

So I was wondering can any of you give me an example of a good 3-tier app?

Sorry I think I might be unclear, I am looking for codes :) (in OOP)

Answer 1

Consider StackOverflow. It has a data tier containing all the user and question/answer information. It has a fairly sophisticated business-logic tier for managing things like user permissions based upon reputation score, voting questions and answers up/down, closing/reopening questions, handing out badges, and so on. And it has a functional if slightly dated HTML and JavaScript user-interface tier that people use to create and edit their questions and answers, among other things.