OBJECT ORIENTED DATABASE QUIZ

You may specify an object identifier with only one unique tag name.

False

True

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The ODMG Object Model supports only unary and binary relationships.

False

True

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The reserved word enum is used for which of the following?

To define a range for a relationship.

All of these

To define a range for a class.

To define a range for an attribute.

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A relationship should be specified how in the ODL?

One direction starting with the second class

Both directions

One direction starting with the first class

Neither direction

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

All of these

A method to implement a logical schema

Used to develop logical schemas

A data definition language for OODB

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In ODL, you specify an operation using parentheses after its name.

False

True

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ODL supports the abstract keyword for classes and operations.

False

True

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Literals do not have identifiers, and, therefore, cannot be individually referenced like objects.

False

True

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

Manager is an abstract class and a superclass.

Manager is an abstract class and a subclass.

Manager is a concrete class and a superclass.

Manager is a concrete class and a subclass.

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Specifying a key ensures that no two objects belonging to a class have the same value for the key attribute(s).

True

False

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