Related Questions

When the parent entity is required, cascading updates and cascading deletions should be allowed or the associated actions on the parent should be prohibited.
A True
B False
When the parent entity is required, a new parent row can always be inserted.
A True
B False
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 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 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
A strong entity is an entity whose existence depends on some other entity type.
A True
B False
What MySQL property is used to create a surrogate key in MySQL?
A UNIQUE
B SEQUENCE
C AUTO_INCREMENT
D None of the mentioned
When the parent entity is required, a new child row can always be inserted.
A True
B False
When the child entity is required, we are restricted from creating a new parent row without also creating a corresponding child row at the same time.
A True
B False

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