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