State diagrams show how an object will behave through the various processes of the system. The circle at the start of the system is known as the entry point, and the end of the system is known as the exit point. The arrows between the states are known as triggers (and should be labelled).
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Task1: Create a state diagram for an auction website. (e.g. eBay)
Task 2: Create a state diagram for a social network. (e.g. Facebook)
Task 3: Create a state diagram for a game of Pacman.