Database - Data Modeling with ER Model

Exercise :: Data Modeling with ER Model - General Questions

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

Answer: Option A

Explanation:

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17. 

Entities can be associated with one another in which of the following?

A. Entities
B. Attributes
C. Identifiers
D. Relationships

Answer: Option D

Explanation:

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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

Answer: Option B

Explanation:

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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

Answer: Option C

Explanation:

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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

Answer: Option B

Explanation:

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