24008465
Beschreibung
Quiz von Craig Willey, aktualisiert more than 1 year ago
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Erstellt von Craig Willey
vor mehr als 4 Jahre
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Frage 1
Frage
The hierarchical database model is based on a ____.
Antworten
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tree structure
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lack of a parent segment
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lack of a child segment
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matrix
Frage 2
Frage
Database models can be grouped into two categories: conceptual models and ____ models.
Antworten
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implementation
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logical
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physical
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query
Frage 3
Frage
A(n) ____ model is independent of both hardware and software.
Antworten
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conceptual
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external
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developmental
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logical
Frage 4
Frage
Which model represents the end user’s view of the database?
Antworten
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Internal
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Conceptual
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Physical
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External
Frage 5
Frage
What type of relationship is expressed with the phrase “Employee manages Store”?
Antworten
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1:M
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1:1
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M:1
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M:N
Frage 6
Frage
The key's role is based on a concept known as ____.
Antworten
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consistency
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availability
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determination
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uniqueness
Frage 7
Frage
The ERD is used to graphically represent the ____ database model.
Antworten
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condensed
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physical
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logical
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conceptual
Frage 8
Frage
A ____ relationship exists when an association is maintained within a single entity.
Antworten
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unary
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ternary
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binary
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weak
Frage 9
Frage
A ____ relationship exists when two entities are associated.
Antworten
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unary
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binary
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ternary
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weak
Frage 10
Frage
The extended entity relationship model (EERM) is sometimes referred to as the ____.
Antworten
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entity relationship model
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enhanced entity relationship model
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entity clustering relationship model
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extended entity relationship diagram
Frage 11
Frage
The property of ____ enables an entity subtype to inherit the attributes and relationships of the supertype.
Antworten
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subtype discriminator
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inheritance
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specialization hierarchy
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entity supertype
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