Exam 6: Data Modeling

A(n)_____ entity cannot exist without the presence of another entity and is normally on the "many" end of a relationship or has an identifier that is based on another entity's attribute.

In an entity called STUDENT,you might find attributes of Student-ID,Last-Name,First-Name and cell-phone.

ERD's are drawn in several levels: Context ERD diagrams;Level 0 ERD diagrams;Level 1 ERD diagrams.

Which would NOT likely be an attribute of an entity called "Student"?

A data model is a:

During the analysis phase logical data models are created.

The two methods to validate that an ERD is well formed are _____.

Omar has a model with 85 entities.He can:

A data model is a formal way of representing the data that are used and created by a business system.

A textbook-provided example of a 'full-service CASE' tool is Visible Analyst.

In defining the data characteristics of Universal Product Codes,we might describe them as twelve characters made up of digits - numeric only.

The lines that connect the entities are referred to as?

An illustration of the transformation of data into business value is an ERD.

If the logical data model contains attribute values that depend on an attribute that is not the identifier,then it is in _____.

A graphical illustration that shows the information that is created,stored and used by a business system would be an ERD.

Balance occurs between DFDs and ERDs when the data stores _____

An entity is described by an action verb.

Data models can be either logical or physical.