Multiple Choice
The _____ depicts the arrangement of higher-level entity supertypes (parent entities) and lower-level entity subtypes (child entities) .
A) subtype discriminator
B) inheritance
C) specialization hierarchy
D) entity supertype
Correct Answer:
Verified
Correct Answer:
Verified
Q59: The "_" characteristic of a primary key
Q60: In specialization hierarchies with multiple levels of
Q61: The extended entity relationship model (EERM) is
Q62: Disjoint subtypes are also known as _
Q63: A subtype contains attributes that are common
Q65: _ completeness means that every supertype occurrence
Q66: At the implementation level, the supertype and
Q67: Composite primary keys are particularly useful as
Q68: In the context of total completeness, in
Q69: The _ specifies whether each entity supertype