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

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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 most useful for traditional, two-dimensional database table applications.
They are overtaking RDBMS for all applications.
All of these

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Object Oriented Database
An extent is which of the following?

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

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