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Question
Within a specialization hierarchy, a supertype can exist only within the context of a subtype.a. True
b. False
Answer
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Related questions
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a. True
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a. True
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In the context of partial dependencies, data redundancies occur because every row entry requires duplication of data.
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Normalization is a process that is used for changing attributes to entities.
a. True
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Overlapping subtypes are subtypes that contain_______--- subsets of the supertype entity set.a. nullb. exclusivec. solitaryd. nonunique
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b. Supertype has optional subtypes.
c. Subtype discriminators cannot be null.
d. Subtype does not have a supertype.
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The hierarchical model is software-independent.a. Trueb. False