SER 322 Midterm Exam Update

SER 322 Midterm Exam Update

SER 322 Midterm Exam
What is a Composite attribute?
A. An attribute that represents a value that is derivable from a related attribute or set of
attributes, not necessarily in the same entity
B. An attribute that holds multiple values for a single component
C. An attribute composed of multiple components each with individual existence
D. An attribute that holds a single value for a single entity
E. An attribute composed of a single component with an independent existence
A condition that an entity can be a member of at most one of the subclasses of the
specialization is called ______________.
A. completeness constraint
B. overlapping constraint
C. disjointness constraint
D. predicate constraint
A condition that an entity can be a member of more than one of the subclasses of the
specialization is called ______________.
A. completeness constraint
B. overlapping constraint
C. disjointness constraint
D. predicate constraint
A condition that every entity in the superclass must be a member of some subclass in
the specialization/ generalization is called ______________.
A. completeness constraint
B. overlapping constraint
C. disjointness constraint
D. predicate constraint