Chapter 4 Enterprise Modeling 
1.Describe enterprise modeling, and name the main enterprise modeling techniques.
2.Explain the purpose of an ERD, and provide four examples of one-to-one, one-to-many, and many-to-many relationships. Also provide one example of an associative entity.
3.Describe the Game and Sarson symbols used for processes, data flows, data storts, and entities.
4.What is the relationship between a context diagram and diagram 0,and which symbol is mot used in a context diagram?
5.What is meant by an exploded DFD?
6.Describe a data dictionary and give examples of how and when it is used.
7.Explain the DFD leveling technique.
8.What is a balanced DFD?
9.Describe the steps in creating a decision table.
10.What is structured English?