Multiple Choice
Which of the following statements is true about the figure shown below? 
A) A rental unit must be either an apartment or a house, and cannot be both at the same time.
B) A rental unit can be an apartment, house or just a rental unit; it may not be more than one at the same time.
C) A rental unit must be either an apartment or a house, and could be both.
D) A rental unit can be an apartment, a house or just a rental unit. It could be both an apartment and a house at the same time.
Correct Answer:

Verified
Correct Answer:
Verified
Q18: Discuss the reasoning behind using supertype/subtype relationships.
Q19: The subtype discriminator is a composite attribute
Q20: Packaged data models use an entity type
Q21: Supertype/subtype relationships should not be used when
Q22: Discuss how attribute inheritance works in a
Q24: The total specialization rule states that an
Q25: Subtypes at the lowest level of a
Q26: When the total specialization rule is set
Q27: Entity clustering is a methodology for grouping
Q28: Why are packaged data models gaining popularity?