Question 1

To define a class that will represent a car, which of the following definitions is most appropriate?

Accepted Answer

A)  private class car 
B)  public class car 
C)  public class Car 
D)  public class CAR 
E)  private class Car 
A)  private class car 
B)  public class car 
C)  public class Car 
D)  public class CAR 
E)  private class Car

Question 2

Instance data for a Java class

Accepted Answer

A)  are limited to primitive types (e.g., int, float, char) 
B)  are limited to Strings 
C)  are limited to objects(e.g., Strings, classes defined by other programmers) 
D)  may be primitive types or objects, but objects must be defined to be private 
E)  may be primitive types or objects 
A)  are limited to primitive types (e.g., int, float, char) 
B)  are limited to Strings 
C)  are limited to objects(e.g., Strings, classes defined by other programmers) 
D)  may be primitive types or objects, but objects must be defined to be private 
E)  may be primitive types or objects

Question 3

Having multiple class methods of the same name where each method has a different number of or type of parameters is known as

Accepted Answer

A)  encapsulation 
B)  information hiding 
C)  tokenizing 
D)  importing 
E)  method overloading 
A)  encapsulation 
B)  information hiding 
C)  tokenizing 
D)  importing 
E)  method overloading

Question 4

All Java classes must contain a main method which is the first method executed when the Java class is called upon.

Accepted Answer

A) True 
 B)False

Question 5

An Employee will have a name, social security number, position, and hourly wages. Define the instance data for this class.

Accepted Answer

private String name, ssn, position;
priv

Question 6

A method defined in a class can access the class' instance data without needing to pass them as parameters or declare them as local variables.

Accepted Answer

A) True 
 B)False

Question 7

An object should be encapsulated in order to guard its data and methods from inappropriate access.

Accepted Answer

A) True 
 B)False

Question 8

Regarding the software failure described at the Denver International Airport, it is critical to factor in errors and inefficiencies that always occur in a complex system.

Accepted Answer

A) True 
 B)False

Question 9

What are the objects needed in order to create a Java GUI (graphical user interface)?

Accepted Answer

A)  components 
B)  events 
C)  listeners 
D)  all of the above 
E)  only classes from AWT and/or Swing are needed 
A)  components 
B)  events 
C)  listeners 
D)  all of the above 
E)  only classes from AWT and/or Swing are needed

Question 10

Assume method0 calls method1 and method2, method1 calls method3 which calls method4 and method5. Explain the chain of method calls (what order methods are called and from which method).

Accepted Answer

method0 calls method1 which calls method

Question 11

Consider a method defined with the header: public void doublefoo(double x). Which of the following method calls is legal?

Accepted Answer

A)  doublefoo(0); 
B)  doublefoo(0.555); 
C)  doublefoo(0.1 + 0.2); 
D)  doublefoo(0.1, 0.2); 
E)  all of the above are legal except for D 
A)  doublefoo(0); 
B)  doublefoo(0.555); 
C)  doublefoo(0.1 + 0.2); 
D)  doublefoo(0.1, 0.2); 
E)  all of the above are legal except for D

Question 12

What visibility modifiers would you use for the methods that move the elevator up one floor, move the elevator down one floor, that request the elevator, and that start the elevator moving?

Accepted Answer

The request for the elevator will be per

Question 13

Visibility modifiers include

Accepted Answer

A)  public, private 
B)  public, private, protected 
C)  public, private, protected, final 
D)  public, protected, final, static 
E)  public, private, protected, static 
A)  public, private 
B)  public, private, protected 
C)  public, private, protected, final 
D)  public, protected, final, static 
E)  public, private, protected, static

Question 14

Add a constructor to class Box for a cube, which has only 1 parameter, side.

Accepted Answer

Box(double s)
{
leng

Question 15

StringTokenizer is a class in the java.util library that can divide a String based on some delimiter String (a delimiter is a separator). If the instruction StringTokener st = new StringTokenizer(str, "&&"); is executed, where str is some String, then st divides up str into separate Strings whenever

Accepted Answer

A)  a blank space is found 
B)  two blank spaces are found 
C)  a single ampersand ("&") is found 
D)  two ampersands are found 
E)  two ampersands or the substring "and" or "AND" is found 
A)  a blank space is found 
B)  two blank spaces are found 
C)  a single ampersand ("&") is found 
D)  two ampersands are found 
E)  two ampersands or the substring "and" or "AND" is found

Question 16

The interface of a class is based on those data instances and methods that are declared public.

Accepted Answer

A) True 
 B)False

Question 17

In a UML diagram for a class

Accepted Answer

A)  classes are represented as rectangles 
B)  there may be a section containing the name of the class 
C)  there may be a section containing the attributes (data) of the class 
D)  there may be a section containing the methods of the class 
E)  all of the above 
A)  classes are represented as rectangles 
B)  there may be a section containing the name of the class 
C)  there may be a section containing the attributes (data) of the class 
D)  there may be a section containing the methods of the class 
E)  all of the above

Question 18

The software failure at the Denver International Airport's baggage handling system is a good example of

Accepted Answer

A)  how a large system can be obsolete by the time it is developed 
B)  how designers sometimes have too much faith in the technology they are using 
C)  how failures are often a result of multiple variables caused by a system as a whole in actual operation 
D)  how the use of a centralized computer is really unrealistic in today's distributed processing 
E)  all of the above 
A)  how a large system can be obsolete by the time it is developed 
B)  how designers sometimes have too much faith in the technology they are using 
C)  how failures are often a result of multiple variables caused by a system as a whole in actual operation 
D)  how the use of a centralized computer is really unrealistic in today's distributed processing 
E)  all of the above

Question 19

Which of the following reserved words in Java is used to create an instance of a class?

Accepted Answer

A)  class 
B)  public 
C)  public or private, either could be used 
D)  import 
E)  new 
A)  class 
B)  public 
C)  public or private, either could be used 
D)  import 
E)  new

Question 20

Write the statement to instantiate an Box object, blueBox, with a length of 6, width of 4, and height of 2.

Accepted Answer

Box blueBo

To define a class that will represent a car, which of the following definitions is most appropriate?

Instance data for a Java class

Having multiple class methods of the same name where each method has a different number of or type of parameters is known as

All Java classes must contain a main method which is the first method executed when the Java class is called upon.

An Employee will have a name, social security number, position, and hourly wages. Define the instance data for this class.

A method defined in a class can access the class' instance data without needing to pass them as parameters or declare them as local variables.

An object should be encapsulated in order to guard its data and methods from inappropriate access.

Regarding the software failure described at the Denver International Airport, it is critical to factor in errors and inefficiencies that always occur in a complex system.

What are the objects needed in order to create a Java GUI (graphical user interface)?

Assume method0 calls method1 and method2, method1 calls method3 which calls method4 and method5. Explain the chain of method calls (what order methods are called and from which method).

Consider a method defined with the header: public void doublefoo(double x). Which of the following method calls is legal?

What visibility modifiers would you use for the methods that move the elevator up one floor, move the elevator down one floor, that request the elevator, and that start the elevator moving?

Visibility modifiers include

Add a constructor to class Box for a cube, which has only 1 parameter, side.

StringTokenizer is a class in the java.util library that can divide a String based on some delimiter String (a delimiter is a separator). If the instruction StringTokener st = new StringTokenizer(str, "&&"); is executed, where str is some String, then st divides up str into separate Strings whenever

The interface of a class is based on those data instances and methods that are declared public.

In a UML diagram for a class

The software failure at the Denver International Airport's baggage handling system is a good example of

Which of the following reserved words in Java is used to create an instance of a class?

Write the statement to instantiate an Box object, blueBox, with a length of 6, width of 4, and height of 2.

Introduction

Data and Expressions

Using Classes and Objects

Conditionals and Loops

More Conditionals and Loops

Object-Oriented Design

Arrays

Inheritance

Polymorphism

Exceptions

Recursion

Collections

Filters

Exam 4: Writing Classes

To define a class that will represent a car, which of the following definitions is most appropriate?

Instance data for a Java class

Having multiple class methods of the same name where each method has a different number of or type of parameters is known as

All Java classes must contain a main method which is the first method executed when the Java class is called upon.

An Employee will have a name, social security number, position, and hourly wages. Define the instance data for this class.

A method defined in a class can access the class' instance data without needing to pass them as parameters or declare them as local variables.

An object should be encapsulated in order to guard its data and methods from inappropriate access.

Regarding the software failure described at the Denver International Airport, it is critical to factor in errors and inefficiencies that always occur in a complex system.

What are the objects needed in order to create a Java GUI (graphical user interface)?

Assume method0 calls method1 and method2, method1 calls method3 which calls method4 and method5. Explain the chain of method calls (what order methods are called and from which method).

Consider a method defined with the header: public void doublefoo(double x). Which of the following method calls is legal?

What visibility modifiers would you use for the methods that move the elevator up one floor, move the elevator down one floor, that request the elevator, and that start the elevator moving?

Visibility modifiers include

Add a constructor to class Box for a cube, which has only 1 parameter, side.

The interface of a class is based on those data instances and methods that are declared public.

In a UML diagram for a class

The software failure at the Denver International Airport's baggage handling system is a good example of

Which of the following reserved words in Java is used to create an instance of a class?

Write the statement to instantiate an Box object, blueBox, with a length of 6, width of 4, and height of 2.

Introduction

Data and Expressions

Using Classes and Objects

Conditionals and Loops

More Conditionals and Loops

Object-Oriented Design

Arrays

Inheritance

Polymorphism

Exceptions

Recursion

Collections

Filters