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Database - Object-Oriented Database - Discussion

Discussion Forum : Object-Oriented Database - General Questions (Q.No. 2)
Object-Oriented Database
2.
An extent is which of the following?
A keyword that indicates that the subclass inherits from a superclass
A keyword that indicates that the superclass inherits from a subclass
The set of all instances of a class within a database
Only one instance of a class within a database
Answer: Option
Explanation:
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