16. In which of the following is a single-entity instance of one type of related to a single-entity instance of another type?
A. One-to-One Relationship
B. One-to-Many Relationship
C. Many-to-Many Relationship
D. Composite Relationship
17. Entities can be associated with one another in which of the following?
A. Entities
B. Attributes
C. Identifiers
D. Relationships
18. Which type of entity has its relationship to another entity determined by an attribute in that other entity called a discriminator?
A. Supertype entity
B. Subtype entity
C. Archetype entity
D. Instance entity
19. Which type of entity represents a logical generalization whose actual occurrence is represented by a second, associated entity?
A. Supertype entity
B. Subtype entity
C. Archetype entity
D. Instance entity
20. In a one-to-many relationship, the entity that is on the many side of the relationship is called a(n) ________ entity.
A. parent
B. child
C. instance
D. subtype