Related Questions

In which of the following is a single-entity instance of one type related to many entity instances of another type?
A One-to-One Relationship
B One-to-Many Relationship
C Many-to-Many Relationship
D Composite Relationship
Which type of entity cannot exist in the database unless another type of entity also exists in the database, but does not require that the identifier of that other entity be included as part of its own identifier?
A Weak entity
B Strong entity
C ID-dependent entity
D ID- independent entity
Which type of entity is related to two or more associated entities that each contain specialized attributes that apply to some but not all of the instances of the entity?
A Supertype entity
B Subtype entity
C Archetype entity
D Instance entity
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
Which of the following refers to an entity in which the identifier of one entity includes the identifier of another entity?
A Weak entity
B Strong entity
C ID-dependent entity
D ID-independent entity
An ID-dependent entity is an entity whose identifier is a composite identifier where no portion of the composite identifier is an identifier of another entity.
A True
B False
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
A strong entity is an entity whose existence depends on some other entity type.
A True
B False
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
When the minimum and maximum number of instances of an entity is one, you know which of the following?
A Mandatory one
B Optional one
C Mandatory many
D Cannot tell

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