|
A data model is usually graphical. |
True |
|
The terms data model and database model are often used interchangeably. |
True |
|
An implementation-ready data model should contain a description of the data structure that will store the end-user data. |
True |
|
Within the database environment, a data model represents data structures with the purpose of supporting a specific problem domain. |
True |
|
Data modeling starts with a very complex representation, and as knowledge of the problem is gained, the model is simplified. |
False |
|
A manager and a programmer usually have the same view of the same data. |
False |
|
Database designers determine the data and information that yield the required understanding of the entire business. |
False |
|
Business rules apply to businesses and government groups, but not to other types of organizations such as religious groups or research laboratories. |
False |
|
Business rules must be rendered in writing. |
True |
|
In an SQL-based relational database, each table is dependent on another. |
False |
|
In an SQL-based relational database, rows in different tables are related based on common values in common attributes. |
True |
|
End-user interfaces require the end user to manually generate SQL code. |
False |
|
Each row in the relational table is known as an entity instance or entity occurrence in the ER model. |
True |
|
In Chen notation, entities and relationships must be oriented horizontally. |
False |
|
M:N relationships are not appropriate in a relational model. |
True |
|
Today, most relational database products can be classified as object/relational. |
True |
|
The network model has structural level dependence. |
True |
|
The entity relationship model is limited to conceptual modeling, with no implementation component. |
True |
|
The hierarchical model is software-independent. |
False |
|
The relational model is hardware-dependent and software-independent. |
False |
Share This
Flashcard
