OBJECT ORIENTED DATABASE QUIZ

Before specifying a key for a class, you must specify its extent.

True

False

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YOUR ANSWER : ?

A collection of literals or object types is called a bag.

True

False

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

True

False

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The Object Query Language is which of the following?

Similar to SQL and uses a select-from-where structure

Similar to SQL and uses a select-where structure

Not similar to SQL

Similar to SQL and uses a from-where structure

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YOUR ANSWER : ?

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

False

True

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

True

False

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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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Using ODL, you can define which of the following?

All of these

Structure

Attribute

Operation

TRUE ANSWER : ?
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An extent is which of the following?

A keyword that indicates that the subclass inherits from a superclass

Only one instance of a class within a database

A keyword that indicates that the superclass inherits from a subclass

The set of all instances of a class within a database

TRUE ANSWER : ?
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In ODL, you specify an operation using parentheses after its name.

True

False

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