Related Questions

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
When mapping a regular entity into a relation which of the following is true?
A One relation is created.
B Two relations are created.
C Three relations are created.
D Four relations are created.
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
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
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
Which of the following conditions should exist if you want to convert a relationship to an associative entity?
A Some of the relationships for the participating entities are 'many'.
B The resulting associative entity has an independent meaning.
C The resulting associative entity has no attributes.
D All of the above.
When transforming an entity-relationship model into a relational database design, each entity is represented as a table.
A True
B False
When mapping a many-to-many unary relationship into a relation which of the following is true?
A One relation is created.
B Two relations are created.
C Three relations are created.
D Four relations are created.
When mapping a binary many-to-many relationship into a relation which of the following is true?
A One relation is created.
B Two relations are created.
C Three relations are created.
D Four relations are created.

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