Choose a transaction that you are likely to encounter, perhaps ordering a cap and gown for graduation, and develop a high-level DFD or a context...

2.     Choose a transaction that you are likely to encounter, perhaps ordering a cap and gown for graduation, and develop a high-level DFD or a context diagram. Decompose this to a level-0 diagram.

1.      Evaluate the level-0 DFD from the previous problem, and edit it to make sure it does not violate the rules from drawing DFDs listed in the chapter. Explain why your DFD is now correct, and/or why it does not violate any rules.