Exercise: Data Modeling With The Entity Relationship Model

Questions for: Data Modeling With The Entity Relationship Model

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
Answer: B
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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
Answer: C
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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
Answer: B
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Entities can be associated with one another in which of the following?
A:
Entities
B:
Attributes
C:
Identifiers
D:
Relationships
Answer: D
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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
Answer: A
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