OBJECT ORIENTED DATABASE QUIZ

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

False

True

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The ODMG Object Model supports only unary and binary relationships.

False

True

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A relationship should be specified how in the ODL?

One direction starting with the first class

One direction starting with the second class

Both directions

Neither direction

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An atomic literal is which of the following?

Boolean

Strings

All of these

Long

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The Object Model supports different literal types, but does not support atomic literals, collection literals, and structured literals.

False

True

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An extent is which of the following?

The set of all instances of a class within a database

Only one instance of a class within a database

A keyword that indicates that the subclass inherits from a superclass

A keyword that indicates that the superclass inherits from a subclass

TRUE ANSWER : ?
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ODL supports the abstract keyword for classes and operations.

True

False

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Identify the class name for the following code: ABC123 course();

course

All of these

ABC123

course()

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The ODMG Object Model requires that a relationship be specified in both directions.

True

False

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An attribute's value is either a literal or an object identifier.

False

True

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YOUR ANSWER : ?

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