It is appropriate to use a supertype/subtype relationship when there are attributes that apply to some of the instances of an entity type.
It is appropriate to use a supertype/subtype relationship when there are attributes that apply to some of the instances of an entity type.
An oval represents which of the following in an EER?
An oval represents which of the following in an EER?
Inheritance is which of the following?
Inheritance is which of the following?
When an entity instance may be a member of multiple subtypes or it does not have to be a member of a subtype, it is which of the following?
When an entity instance may be a member of multiple subtypes or it does not have to be a member of a subtype, it is which of the following?
Which of the following statements concerning business rules is true?
Which of the following statements concerning business rules is true?
A subtype entity name should be which of the following?
A subtype entity name should be which of the following?
An action assertion is a statement that expresses some aspect of the static structure of the organization.
An action assertion is a statement that expresses some aspect of the static structure of the organization.
When an entity instance must be a member of only one subtype, it is which of the following?
When an entity instance must be a member of only one subtype, it is which of the following?
Which of the following is not one of the three ways to classify an action assertion?
Which of the following is not one of the three ways to classify an action assertion?
Total specialization is represented by double lines between the supertype and subtype on an EER.
Total specialization is represented by double lines between the supertype and subtype on an EER.
Use of a supertype/subtype relationship is necessary when which of the following exists?
Use of a supertype/subtype relationship is necessary when which of the following exists?
A supertype/subtype hierarchy has which of the following features?
A supertype/subtype hierarchy has which of the following features?
An entity instance of a subtype represents the same entity instance of a supertype.
An entity instance of a subtype represents the same entity instance of a supertype.
Specialization is which of the following processes?
Specialization is which of the following processes?
Packaged data models are meant to be exactly right straight out of the box.
Packaged data models are meant to be exactly right straight out of the box.
Overlapping and disjoint subtypes have different approaches on how the subtype discriminator is applied.
Overlapping and disjoint subtypes have different approaches on how the subtype discriminator is applied.
A subtype discriminator is which of the following?
A subtype discriminator is which of the following?
An entity cluster is a set of one or more entity types and associated relationships.
An entity cluster is a set of one or more entity types and associated relationships.
There is cardinality on an EER between the supertype and subtype.
There is cardinality on an EER between the supertype and subtype.
A supertype is an entity type that shares common attributes or relationships distinct from other subgroupings.
A supertype is an entity type that shares common attributes or relationships distinct from other subgroupings.
A subtype discriminator of the supertype is an attribute whose values determine the target subtype(s).
A subtype discriminator of the supertype is an attribute whose values determine the target subtype(s).
An ERD that has had the entities clustered will display more entities.
An ERD that has had the entities clustered will display more entities.
A supertype can only have only one subtype.
A supertype can only have only one subtype.
A supertype/subtype hierarchy is which of the following?
A supertype/subtype hierarchy is which of the following?
An action assertion must include which of the following?
An action assertion must include which of the following?
Action assertions have traditionally been implemented within an application program.
Action assertions have traditionally been implemented within an application program.
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.
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.
Generalization is the process of defining more general entity types from a set of more specialized entity types.
Generalization is the process of defining more general entity types from a set of more specialized entity types.
A rectangle represents which of the following in an EER?
A rectangle represents which of the following in an EER?
Which one of the following symbols is not used in an ERD?
Which one of the following symbols is not used in an ERD?
