It is appropriate to use a supertype/subtype relationship when there are attributes that apply to some of the instances of an entity type.

A True

B False

Correct Answer: True

Bissoy MCQ Team

#Database #ER Model And Business Rules

Related Questions

Which type of entity is related to two or more associated entities that each contain specialized attributes that apply to some but not all of the instances of the entity?

In which of the following can many entity instances of one type be related to many entity instances of another type?

In which of the following is a single-entity instance of one type related to many entity instances of another type?

Which type of entity has its relationship to another entity determined by an attribute in that other entity called a discriminator?

A strong entity is an entity whose existence depends on some other entity type.

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?

Which of the following refers to an entity in which the identifier of one entity includes the identifier of another entity?

An ID-dependent entity is an entity whose identifier is a composite identifier where no portion of the composite identifier is an identifier of another entity.

In which of the following is a single-entity instance of one type of related to a single-entity instance of another type?

When transforming an entity-relationship model into a relational database design, each entity is represented as a table.

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