ER Model and Business Rules - Database MCQ Questions and answers- Technical Aptitude

Home / Database / ER Model And Business Rules

21.
Overlapping and disjoint subtypes have different approaches on how the subtype discriminator is applied.

A. True

B. False

Answer & Solution Discuss in Board Save for Later

22.
An entity instance of a subtype represents the same entity instance of a supertype.

A. True

B. False

Answer & Solution Discuss in Board Save for Later

23.
A supertype is an entity type that shares common attributes or relationships distinct from other subgroupings.

A. True

B. False

Answer & Solution Discuss in Board Save for Later

24.
An ERD that has had the entities clustered will display more entities.

A. True

B. False

Answer & Solution Discuss in Board Save for Later

25.
Total specialization is represented by double lines between the supertype and subtype on an EER.

A. True

B. False

Answer & Solution Discuss in Board Save for Later

26.
Generalization is the process of defining more general entity types from a set of more specialized entity types.

A. True

B. False

Answer & Solution Discuss in Board Save for Later

27.
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

Answer & Solution Discuss in Board Save for Later

28.
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. True

B. False

Answer & Solution Discuss in Board Save for Later

29.
Action assertions have traditionally been implemented within an application program.

A. True

B. False

Answer & Solution Discuss in Board Save for Later

30.
An entity cluster is a set of one or more entity types and associated relationships.

A. True

B. False

Answer & Solution Discuss in Board Save for Later

1 2 3