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ER Model and Business Rules
Inheritance is which of the following?
When a supertype entity inherits values of the subtype attribute
When a subtype entity inherits values of the supertype attribute
When a supertype entity inherits values of another supertype attribute
When a subtype entity inherits values of another subtype attribute
Correct Answer:
When a subtype entity inherits values of the supertype attribute
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More Questions from
ER Model and Business Rules
When an entity instance must be a member of only one subtype, it is which of the following?
A rectangle represents which of the following in an EER?
Specialization is which of the following processes?
Which of the following statements concerning business rules is true?
Overlapping and disjoint subtypes have different approaches on how the subtype discriminator is applied.
There is cardinality on an EER between the supertype and subtype.
A supertype is an entity type that shares common attributes or relationships distinct from other subgroupings.
Total specialization is represented by double lines between the supertype and subtype on an EER.
If an entity adheres to the disjoint rule, then an entity instance can be a member of more than one entity for a given supertype.
A subtype discriminator of the supertype is an attribute whose values determine the target subtype(s).
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