Chapter 10

Question 1

Abstract Data Type

Answer 1

(ADT) A class is also known as an abstract data type.

Question 2

aggregation

Answer 2

A special form of association that represents an ownership relationship between two classes.

Question 3

boxing

Answer 3

Converting a primitive value to a wrapper object is called boxing.

Question 4

class abstraction

Answer 4

A technique in software development that hides detailed implementation. Class abstraction hides the implementation of the class from the client; if you decide to change the implementation, the client program will not be affected.

Question 5

class encapsulation

Answer 5

Combining of methods and data into a single data structure

Question 6

class’s contract

Answer 6

Refers to the collection of methods and fields that are accessible from outside a class, together with the description of how these members are expected to behave.

Question 7

composition

Answer 7

An object that consists of other objects. This is called composition.

Question 8

has-a relationship

Answer 8

Composition models have a has-a relationship.

Question 9

multiplicity

Answer 9

Every class involved in a relationship may specify a multiplicity. A multiplicity could be a number or an interval that specifies how many of the class s objects are involved in the relationship

Question 10

stack

Answer 10

A stack is a data structure that holds objects in a last-in first-out fashion

Question 11

unboxing

Answer 11

Converting a wrapper object to a primitive value is called unboxing. The reverse conversion is called boxing.