Exam 2: Data Models

In _________________________,a three-pronged symbol represents the "many" side of the relationship.

VMS/VSAM is an example of a(n)____.

A manager and a programmer usually have the same view of the same data.

The object-oriented data model was developed in the ____.

In the ____ model,each parent can have many children,but each child has only one parent.

A(n)____________________ is a representation of the relational database's entities,the attributes within those entities and the relationships between those entities.

The ____________________ defines the portion of the database "seen" by the application programs that produce information from the data.

MySQL is an example of a(n)____.

The ____ data model is said to be a semantic data model.

A data model is usually graphical.

Describe the three parts involved in any SQL-based relational database application.

Business rules are derived from ____.

Oracle 11g is an example of a(n)____.

A(n)____________________ is a brief,precise,and unambiguous description of a policy,procedure,or principle within a specific organization.

A(n)____________________ in a hierarchical model is the equivalent of a record in a file system.

The ____ data model uses the concept of inheritance.

In the ____ model,the basic logical structure is represented as an upside-down tree.

____ are important because they help to ensure data integrity.

One of the limitations of the ____ model is that there is a lack of standards.

Each row in the relational table is known as an entity instance or entity occurrence in the ER model.