f2form

True or false. The partial specialization rule in completeness constraints is represented by a double line

• True

• False

True or false. The disjoint rule in disjointness constraints is where an instance of the supertype could be more than one of the subtypes.

• True

• False

True or false. If supertype A has a relationship with supertype B, the subtypes under supertype A will also have a relationship with supertype B.

• True

• False

What is the process of defining a more general entity type from a set of more specialized entity types?

• Specialization

• Generalization

• Column Definition

• Set Definition

These is a set of one or more entity types and associated relationships grouped into a single abstract entity type.

• Set combination

• Limited Groups

• Entity Cluster

• Entity Accumulation

True or false. The instances of a subtype must participate in a relationship unique to that subtype.

• True

• False

True or false. The overlap rule in disjointness constraints is where an instance of the supertype could be more than one of the subtypes.

• True

• False

Using diagram 3, which among the following is true?

• The teacher entity should be the only subtype in the diagram

• Adminstration entity should be the supertype of the diagram

• The entity worker is the subtype of the teacher

• The entities administration, teacher and staff are subtypes of the worker

True or false. The disjoint rule in disjointness constraints is an instance of the supertype can be only one of the subtypes.

• True

• False

True or false. The overlap rule in disjointness constraints is where an instance of the supertype can be only one of the subtypes.

• True

• False