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