Q:

An extent is which of the following?

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An extent is which of the following?


  1. A keyword that indicates that the subclass inherits from a superclass
  2. A keyword that indicates that the superclass inherits from a subclass
  3. The set of all instances of a class within a database
  4. Only one instance of a class within a database

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 (c).The set of all instances of a class within a database

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DBMS - DATA MODELS MCQ

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