The entity relationship model is limited to conceptual modeling, with no implementation component.
True or False - Answers True
A manager and a programmer usually have the same view of the same data.
True or False - Answers False
An implementation-ready data model should contain a description of the data structure that will store
the end-user data.
True or False - Answers True
A(n) ____ is bidirectional.
a. attribute
b. entity
c. relationship
d. constraint - Answers Relationship
Data modeling starts with a very complex representation, and as knowledge of the problem is gained,
the model is simplified.
True or False - Answers True
Within the database environment, a data model represents data structures with the purpose of
supporting a specific problem domain.
True or False - Answers True
MySQL is an example of a(n) ____.
a. hierarchical model
b. file system data model
c. relational data model
d. XML data model - Answers Relational data model
A data model is usually graphical.
True or False - Answers True
The hierarchical model is software-independent.
True or False - Answers False
The ____ model is the end users' view of the data environment.
a. abstract
b. external
c. conceptual
d. internal - Answers External
A noun in a business rule translates to a(n) ____ in the data model.
a. entity
b. attribute
c. relationship
d. constraint - Answers Entity
End-user interfaces require the end user to manually generate SQL code.
True or False - Answers False
A(n) ____ is the equivalent of a field in a file system.
a. attribute
b. entity
c. relationship
d. constraint - Answers attribute
In Chen notation, entities and relationships must be oriented horizontally.
True or False - Answers False
In an SQL-based relational database, rows in different tables are related based on common values in
common attributes.
True or False - Answers False
The terms data model and database model are often used interchangeably.