Question 1

Messages that change an object's state are called ____________________.

Accepted Answer

The answer of Messages that change an object's state are...

Question 2

A(n) ____ is a runtime entity that contains data and responds to messages.

Accepted Answer

A)  object 
B)  class 
C)  package 
D)  method

Question 3

All of the following are true about constructors, EXCEPT ____.

Accepted Answer

A)  if a class has more than one constructor, all of the constructors must have the same name 
B)  if a class template contains no constructors, the JVM provides a primitive default constructor 
C)  a class is harder to use when it has a variety of constructors 
D)  all of the above are true

Question 4

Java programmers must instruct the program to delete objects explicitly.

Accepted Answer

A) True 
 B)False

Question 5

____ is used to set up a skeletal, incomplete, but running program during program development.

Accepted Answer

A)  { } 
B)  A stub 
C)  A placeholder 
D)  A helper method

Question 6

A program can detect and respond to mouse events by attaching ____ objects to a panel.

Accepted Answer

A)  clicker 
B)  listener 
C)  button 
D)  helper

Question 7

In the hierarchy of Java classes, at the root of the hierarchy is a class called ____.

Accepted Answer

A)  Object 
B)  Child 
C)  Base 
D)  Subclass

Question 8

When a class includes several constructors, the code for them can be simplified by ____ them.

Accepted Answer

A)  defining 
B)  combining 
C)  instantiating 
D)  chaining

Question 9

An object must have its own unique identity, which distinguishes it from all other objects in the computer's memory. ____________________

Accepted Answer

A) True 
 B)False

Question 10

Parameters listed in a method's definition are called ____ parameters.

Accepted Answer

A)  header 
B)  actual 
C)  formal 
D)  argument

Question 11

In the code ____, i and j are memory locations that have not yet been initialized, but which will hold integers.

Accepted Answer

A)  i = int; j = int; 
B)  int i, j; 
C)  int = i, j; 
D)  i = ?; j = ?;

Question 12

The combining of data and behavior into a single software package is called ____.

Accepted Answer

A)  instantiation 
B)  modification 
C)  encapsulation 
D)  identification

Question 13

The purpose of a message is to pass information to a method.

Accepted Answer

A) True 
 B)False

Question 14

Identify the letter of the choice that best matches the phrase or definition.
a.Garbage collection
b.Reference type
c.Public
d.Information hiding
e.Helper method
-A process in which unreferenced objects are removed from memory.

Accepted Answer

The answer of Identify the letter of the choice that...

Question 15

A variable of a primitive type is thought of as a box that contains a pointer to an object. ____________________

Accepted Answer

A) True 
 B)False

Question 16

Finding run-time errors in a program is more difficult when there are several classes instead of just one.

Accepted Answer

A) True 
 B)False

Question 17

An object has ____________________, which is another way of saying that at any particular moment its instance variables have particular values.

Accepted Answer

The answer of An object has ____________________, which is another...

Question 18

Variables declared within any compound statement enclosed in braces are said to have ____ scope.

Accepted Answer

A)  initial 
B)  infinite 
C)  local 
D)  block

Question 19

Identify the letter of the choice that best matches the phrase or definition.
a.Garbage collection
b.Reference type
c.Public
d.Information hiding
e.Helper method
-A type of visibility modifier.

Accepted Answer

The answer of Identify the letter of the choice that...

Question 20

The process of creating a new object is called ____.

Accepted Answer

A)  instantiation 
B)  modification 
C)  encapsulation 
D)  identification

Exam 6: Introduction to Defining Classes

Messages that change an object's state are called ____________________.

A(n) ____ is a runtime entity that contains data and responds to messages.

All of the following are true about constructors, EXCEPT ____.

Java programmers must instruct the program to delete objects explicitly.

____ is used to set up a skeletal, incomplete, but running program during program development.

A program can detect and respond to mouse events by attaching ____ objects to a panel.

In the hierarchy of Java classes, at the root of the hierarchy is a class called ____.

When a class includes several constructors, the code for them can be simplified by ____ them.

An object must have its own unique identity, which distinguishes it from all other objects in the computer's memory. ____________________

Parameters listed in a method's definition are called ____ parameters.

In the code ____, i and j are memory locations that have not yet been initialized, but which will hold integers.

The combining of data and behavior into a single software package is called ____.

The purpose of a message is to pass information to a method.

Identify the letter of the choice that best matches the phrase or definition. a.Garbage collection b.Reference type c.Public d.Information hiding e.Helper method -A process in which unreferenced objects are removed from memory.

A variable of a primitive type is thought of as a box that contains a pointer to an object. ____________________

Finding run-time errors in a program is more difficult when there are several classes instead of just one.

An object has ____________________, which is another way of saying that at any particular moment its instance variables have particular values.

Variables declared within any compound statement enclosed in braces are said to have ____ scope.

Identify the letter of the choice that best matches the phrase or definition. a.Garbage collection b.Reference type c.Public d.Information hiding e.Helper method -A type of visibility modifier.

The process of creating a new object is called ____.