ER Model and Business Rules A supertype/subtype hierarchy is which of the following? Each subtype has only one supertype. Each subtype has only one attribute. Each supertype has only one subtype. Each supertype has only one attribute. Each subtype has only one supertype. Each subtype has only one attribute. Each supertype has only one subtype. Each supertype has only one attribute. ANSWER DOWNLOAD EXAMIANS APP
ER Model and Business Rules When an entity instance must be a member of only one subtype, it is which of the following? Overlap with total specialization Disjoint with total specialization Overlap with partial specialization Disjoint with partial specialization Overlap with total specialization Disjoint with total specialization Overlap with partial specialization Disjoint with partial specialization ANSWER DOWNLOAD EXAMIANS APP
ER Model and Business Rules Total specialization is represented by double lines between the supertype and subtype on an EER. False True False True 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. True False True False ANSWER DOWNLOAD EXAMIANS APP
ER Model and Business Rules Which one of the following symbols is not used in an ERD? Circle Oval Diamond Rectangle Circle Oval Diamond Rectangle ANSWER DOWNLOAD EXAMIANS APP
ER Model and Business Rules A supertype can only have only one subtype. False True False True ANSWER DOWNLOAD EXAMIANS APP
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