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True or False Quiz
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1

Typically, entities have unique identifiers to allow for tracking across business processes.
A)True
B)False
2

In a relationship, the association between entity types is bidirectional.
A)True
B)False
3

A minimum cardinality of one makes a relationship mandatory; a minimum cardinality of zero makes a relationship optional.
A)True
B)False
4

The minimum and maximum cardinalities of a weak entity are always one.
A)True
B)False
5

A self-referencing relationship is always a 1-M relationship.
A)True
B)False
6

Both Crow's Foot and Chen ERD notation support the direct representation of M-way relationships.
A)True
B)False
7

In a generalization hierarchy, lack of a disjointness constraint would mean that subtypes have entities in common.
A)True
B)False
8

Generalization hierarchies do not show cardinalities because the cardinalities are always the same.
A)True
B)False
9

All entity types must have a primary key, but it can be borrowed on inherited.
A)True
B)False
10

A common mistake in ERD diagramming is reversing the cardinality of an identifying relationship.
A)True
B)False





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