Chapter 6, Object-Oriented Programming Video Solutions, Introduction to Programming with Java: A Problem Solving Approach

00:29

Problem 1

A class is an instance of an object. (T / F)

Ernest Castorena

Numerade Educator

00:55

Problem 2

How many objects may there be within a single class?

Aditya Sood

Numerade Educator

01:48

Problem 3

A class's instance variables must be declared outside of all ________, and all instance variable declarations should be located at the _______.

Foster Wisusik

Numerade Educator

01:18

Problem 4

Methods accessible from outside a class are public, but instance variables (even those that an outsider may need to change or read) are usually private. Why?

Jennifer Stoner

Numerade Educator

03:07

Problem 5

Where does main go-in the driver class or in one of the driven classes?

Sarvesh Somasundaram

Numerade Educator

01:55

Problem 6

When a program has both driver and driven classes, where should most of the program code reside?

Adam Conner

Numerade Educator

01:18

Problem 7

How do you retrieve a private instance variable's value from within a main method?

Jennifer Stoner

Numerade Educator

00:42

Problem 8

A reference variable holds the ________ of an object.

Kaylee Mcclellan

Numerade Educator

02:51

An instance method might contain a statement like this.weight $=1.0 ;$ but if that method's class currently has five instantiated objects, there are five different variables called weight. How can we determine which one is getting the new value?

Prabhu Ramji

Numerade Educator

01:36

Problem 10

What are the default values for int, double, and boolean for an object's instance variables?

Adithya Ramanujam

Numerade Educator

06:02

Problem 11

In the Mouse program of Figures 6.4 and $6.5,$ what is the persistence of gus's age variable?

Linh Vu

Numerade Educator

01:47

Problem 12

After a program is written, a UML class diagram provides a brief outline of each class in the program. It helps other people see what methods are available and what arguments they need. Give some reasons why it might be helpful to have an already created class diagram in front of you while you are implementing the class and writing its methods.

Jennifer Stoner

Numerade Educator

03:07

Problem 13

Assume the main method in Mouse2Driver had started more simply with only Mouse mickey; What would be the value of mickey immediately after this statement?

Sarvesh Somasundaram

Numerade Educator

01:42