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Revised: Fri Apr 08 23:47:01 CDT 2016
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This module is part of a self-assessment test designed to help you determine how much you know about object-orientedprogramming using Java.
Questions and answers
The test consists of a series of questions with answers and explanations of the answers.
The questions and the answers are connected by hyperlinks to make it easy for you to navigate from the question to the answer and back.
Programming challenge questions
The module also contains a section titled Programming challenge questions . This section provides specifications for one or more programs that you should be able to write once you understand the answersto all of the questions. (Note that it is not always possible to confine the programming knowledge requirement to this and earlier modules. Therefore, youmay occasionally need to refer ahead to future modules in order to write the programs.)
Unlike the other questions, solutions are not provided for the Programming challenge questions . However, in most cases, the specifications will describe the output that your program should produce.
Listings
I recommend that you open another copy of this document in a separate browser window and use the links to under Listings to easily find and view the listings while you are reading about them.
What output is produced by the program in Listing 1 ?
| Listing 1 . Question 1. |
|---|
public class Ap001{
public static void main(String args[]){new Worker().hello();
}//end main()}//end class definition
class Worker{public void hello(){
System.out.println("Hello World");}//end hello()
}//end class definition |
What is the largest (algebraic) value of type int?
What is the smallest (algebraic) value of type int?
What two values are displayed by the program in Listing 2 ?
| Listing 2 . Question 4. |
|---|
public class Ap003{
public static void main(String args[]){new Worker().printDouble();
}//end main()}//end class definition
class Worker{public void printDouble(){
System.out.println(Double.MAX_VALUE);
System.out.println(Double.MIN_VALUE);
}//end printDouble()}//end class definition |
What output is produced by the program in Listing 3 ?
| Listing 3 . Question 5. |
|---|
public class Ap004{
public static void main(String args[]){new Worker().printBoolean();
}//end main()}//end class definition
class Worker{private boolean myVar;
public void printBoolean(){System.out.println(myVar);
}//end printBoolean()}//end class definition |
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