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).

True

False

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Which of the following is an unordered collection of elements that may contain duplicates?

List

Set

Dictionary

Bag

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An extent is which of the following?

Only one instance of a class within a database

The set of all instances 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

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If you know all the possible values that an attribute can have, you can enumerate those values in ODL.

False

True

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An atomic literal is which of the following?

All of these

Strings

Long

Boolean

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

To define a range for a class.

All of these

To define a range for a relationship.

To define a range for an attribute.

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ODL supports which of the following types of association relationships?

Unary and Binary and Ternary

Unary and Binary

Unary and Binary and Ternary and higher

Unary

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

False

True

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Using ODL, you can define which of the following?

Structure

Attribute

All of these

Operation

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

True

False

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