ER Model and Business Rules Generalization is the process of defining more general entity types from a set of more specialized entity types. False True False True ANSWER DOWNLOAD EXAMIANS APP
ER Model and Business Rules Use of a supertype/subtype relationship is necessary when which of the following exists? Attributes apply to all of the instances of an entity type. An instance of a subtype participates in a relationship that is unique to that subtype. No attributes apply to any of the instances of an entity type. An instance of a subtype participates in a relationship that is the same as the other subtypes. Attributes apply to all of the instances of an entity type. An instance of a subtype participates in a relationship that is unique to that subtype. No attributes apply to any of the instances of an entity type. An instance of a subtype participates in a relationship that is the same as the other subtypes. ANSWER DOWNLOAD EXAMIANS APP
ER Model and Business Rules It is appropriate to use a supertype/subtype relationship when there are attributes that apply to some of the instances of an entity type. False True False True ANSWER DOWNLOAD EXAMIANS APP
ER Model and Business Rules Total specialization is represented by double lines between the supertype and subtype on an EER. True False True False ANSWER DOWNLOAD EXAMIANS APP
ER Model and Business Rules 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. False True False True ANSWER DOWNLOAD EXAMIANS APP
ER Model and Business Rules Which one of the following symbols is not used in an ERD? Oval Circle Diamond Rectangle Oval Circle Diamond Rectangle ANSWER DOWNLOAD EXAMIANS APP
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