JAVA INTERFACES AND ABSTRACT CLASSES QUIZ

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.

TRUE ANSWER : ?
YOUR ANSWER : ?

The Object Query Language is which of the following?

Similar to SQL and uses a select-where structure

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

Similar to SQL and uses a from-where structure

Not similar to SQL

TRUE ANSWER : ?
YOUR ANSWER : ?

The ODMG Object Model supports only unary and binary relationships.

True

False

TRUE ANSWER : ?
YOUR ANSWER : ?

An ordered collection of elements of the same type are called sets.

True

False

TRUE ANSWER : ?
YOUR ANSWER : ?

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

True

False

TRUE ANSWER : ?
YOUR ANSWER : ?

Using ODL, you can define which of the following?

Structure

Operation

All of these

Attribute

TRUE ANSWER : ?
YOUR ANSWER : ?

Database objects are almost always transient.

True

False

TRUE ANSWER : ?
YOUR ANSWER : ?

ODL supports the abstract keyword for classes and operations.

False

True

TRUE ANSWER : ?
YOUR ANSWER : ?

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

False

True

TRUE ANSWER : ?
YOUR ANSWER : ?

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

True

False

TRUE ANSWER : ?
YOUR ANSWER : ?

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