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Data modeling with er model Practice Questions & Answers

0 vote

A recursive relationship is a relationship between an entity and ________ .

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A recursive relationship is a relationship between an entity and ________ .

A).  itself

B).  an archetype entity

C).  an archetype entity

D).  an instance entity

0 vote

Which type of entity represents an actual occurrence of an associated generalized entity?

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Which type of entity represents an actual occurrence of an associated generalized entity?

A).  Supertype entity

B).  Archetype entity

C).  Archetype entity

D).  Instance entity

40 vote

In a one-to-many relationship, the entity that is on the one side of the relationship is called a(n) ________ entity.

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In a one-to-many relationship, the entity that is on the one side of the relationship is called a(n) ________ entity.

A).  parent

B).  instance

C).  instance

D).  subtype

0 vote

Which type of entity cannot exist in the database unless another type of entity also exists in the database, but does not require that the identifier of that other entity be included as part of its own identifier?

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Which type of entity cannot exist in the database unless another type of entity also exists in the database, but does not require that the identifier of that other entity be included as part of its own identifier?

A).  Weak entity

B).  ID-dependent entity

C).  ID-dependent entity

D).  ID- independent entity

39 vote

Which of the following indicates the maximum number of entities that can be involved in a relationship?

Asked on by Guest | Votes 39

Which of the following indicates the maximum number of entities that can be involved in a relationship?

A).  Minimum cardinality

B).  ERD

C).  ERD

D).  Greater Entity Count (GEC)