Exam 17: E-R Diagrams and the IDEF1X Standard
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Exam 17: E-R Diagrams and the IDEF1X Standard37 Questions
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IDEF1X category entities are mutually exclusive within a cluster.
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(True/False)
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Correct Answer:
True
What are IDEF1X domains?
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Correct Answer:
IDEF1X domains define a named set of possible values for an attribute.IDEF1X has two types of domains,base domains and type domains.A base domain is a domain with a data type and a value list or range definition.A type domain is a subset of a base domain or another type domain,and allows a domain hierarchy to be constructed.
The IDEF1X default cardinality of a nonidentifying connection relationship is one-to-one,with a mandatory parent and an optional child.
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In IDEF1X,extended E-R model N:M relationships are called ________.
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In IDEF1X,extended E-R model subtype entities are called ________.
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In IDEF1X,extended E-R model 1:1 relationships are called ________.
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Extended E-R model 1:N relationships are called identifying connection relationships in IDEF1X.
(True/False)
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In IDEF1X,extended E-R model supertype entities are called ________.
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What line symbols are used in IDEF1X diagrams to represent relationships?
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In IDEF1X,a base domain can have any of the following except a ________.
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Extended E-R model weak,but non-ID-dependent relationships are called nonidentifying connection relationships in IDEF1X.
(True/False)
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In IDEF1X,a category cluster includes BLACK and WHITE,which are the only possible categories.This is an IDEF1X ________.
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In IDEF1X,extended E-R model ID-dependent relationships are called ________.
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The IDEF1X equivalent of the extended E-R model subtype is the category entity,and category entities are placed in categorization clusters.
(True/False)
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IDEF1X nonspecific relationships correspond to N:M relationships in the extended E-R model.
(True/False)
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Extended E-R model N:M relationships are called nonidentifying connection relationships in IDEF1X.
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