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

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

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

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