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Exam 3: Data Models

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Question 1

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A(n) ____________________ is a collection of similar objects with a shared structure and behavior.

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Question 2

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The ____ model was developed to allow designers to use a graphical tool to examine structures rather than describing them with text.

A) hierarchical
B) network
C) object-oriented
D) entity relationship

E) A) and C)
F) All of the above

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Question 3

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Data modeling starts with a very complex representation, and as knowledge of the problem is gained, the model is simplified.

A noun in a business rule translates to a(n) ____ in the data model.

An implementation-ready data model should contain a description of the data structure that will store the end-user data.

____ are normally expressed in the form of rules.

Describe a conceptual model and its advantages. What is the most widely used conceptual model?

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

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

A(n) ____ is anything about which data are to be collected and stored.

The entity relationship model is limited to conceptual modeling, with no implementation component.

A verb associating two nouns in a business rule translates to a(n) ____ in the data model.

In an SQL-based relational database, each table is dependent on another.

M:N relationships are not appropriate in a relational model.

The ____ model uses the term connectivity to label the relationship types.

The ____ model is the end users' view of the data environment.

A(n) ____ represents a particular type of object in the real world.

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

The hierarchical data model was developed in the ____.

In the ____ model, the user perceives the database as a collection of records in 1:M relationships, where each record can have more than one parent.