Chapter 18

Question 1

encode

Answer 1

to represent one set of values using another set of values by constructing a mapping between them.

Question 2

class attribute

Answer 2

an attribute associated with a class object. class attributes are defined inside a class definition but outside any method.

Question 3

instance attribute

Answer 3

an attribute associated with an instance of a class

Question 4

veneer

Answer 4

a method or function that provides a different interface to another function without doing much computation.

Question 5

inheritance

Answer 5

the ability to define a new class that is a modified version of a previously defined class.

Question 6

parent class

Answer 6

the class from which a child class inherits.

Question 7

child class

Answer 7

a new class created by inheriting from an existing class; also called a “sub-class”.

Question 8

IS-A relationship

Answer 8

the relationship between a child class and its parent class.

Question 9

HAS-A relationship

Answer 9

the relationship between two classes where instances of one class contain references to instances of the other.

Question 10

class diagram

Answer 10

a diagram that shows the classes in a program and the relationships between them.

Question 11

multiplicity

Answer 11

a notation in a class diagram that shows, for a HAS-A relationship, how many references there are to instances of another class.