Watch this video in context on the official Unity learn pages -
http://www.unity3d.com/learn/tutorials/topics/scripting/quiz-game-intro-and-setup

In this live training session we will look at creating a multiple choice quiz game. We will create the core game loop - timer, score, win and lose states. We will also show code architecture best practices - keeping data and logic separate, and how to structure a game in a way that makes it easy to maintain and extend. We will look at some of the ways we can extend this in session two.