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

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

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Object Oriented Database
Which of the following is true concerning an ODBMS?

They are most useful for traditional, two-dimensional database table applications.
They have the ability to store complex data types on the Web.
They are overtaking RDBMS for all applications.
All of these

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