24008465
Descrição
Quiz por Craig Willey, atualizado more than 1 year ago
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Criado por Craig Willey
mais de 4 anos atrás
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Questão 1
Questão
The hierarchical database model is based on a ____.
Responda
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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
Questão 2
Questão
Database models can be grouped into two categories: conceptual models and ____ models.
Responda
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implementation
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logical
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physical
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query
Questão 3
Questão
A(n) ____ model is independent of both hardware and software.
Responda
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conceptual
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external
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developmental
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logical
Questão 4
Questão
Which model represents the end user’s view of the database?
Responda
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Internal
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Conceptual
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Physical
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External
Questão 5
Questão
What type of relationship is expressed with the phrase “Employee manages Store”?
Responda
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1:M
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1:1
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M:1
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M:N
Questão 6
Questão
The key's role is based on a concept known as ____.
Responda
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consistency
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availability
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determination
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uniqueness
Questão 7
Questão
The ERD is used to graphically represent the ____ database model.
Responda
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condensed
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physical
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logical
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conceptual
Questão 8
Questão
A ____ relationship exists when an association is maintained within a single entity.
Responda
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unary
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ternary
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binary
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weak
Questão 9
Questão
A ____ relationship exists when two entities are associated.
Responda
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unary
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binary
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ternary
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weak
Questão 10
Questão
The extended entity relationship model (EERM) is sometimes referred to as the ____.
Responda
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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
Questão 11
Questão
The property of ____ enables an entity subtype to inherit the attributes and relationships of the supertype.
Responda
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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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