Object Oriented Database
The object definition language (ODL) is which of the following?

A data definition language for OODB
All of these
A method to implement a logical schema
Used to develop logical schemas

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Object Oriented Database
Which of the following is true concerning the following statement: class Manager extends Employee

Manager is a concrete class and a subclass.
Manager is an abstract class and a superclass.
Manager is an abstract class and a subclass.
Manager is a concrete class and a superclass.

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