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Discussion :: Database System 2 - CS

  1. A supertype/subtype hierarchy has which of the following features?

    2. A.

     Subtypes at the lower lever in the hierarchy inherit attributes only from their immediate supertype.
    B.

     Attributes are assigned at the highest logical level.
    C.

     Subtypes at the higher lever in the hierarchy inherit attributes only from their immediate subtype.
    D.

     Attributes are assigned at the lowest logical level.

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    Workspace

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    Answer : Option B

    Explanation :

    Explanation Not Provided

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