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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.
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.
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 shown in Listing 1 ?
A. Compiler Error
B. Runtime ErrorC. \"Backslash\"->\\\nUnderstand
D. "Backslash"->\
Understand | Listing 1 . Listing for Question 1. |
|---|
public class Ap049{
public static void main(String args[]){new Worker().doEscape();
}//end main()}//end class definition
class Worker{public void doEscape(){
System.out.println("\"Backslash\"->\\\nUnderstand");
}//end doEscape()}// end class |
What output is produced by the program shown in Listing 2 ?
| Listing 2 . Listing for Question 2. |
|---|
public class Ap050{
public static void main(String args[]){new Worker().doArrays();
}//end main()}//end class definition
class Worker{public void doArrays(){
St[]myArray = {new St("Tom"),
new St("Dick"),new St ("Harry")};
for(int cnt = 0;cnt<myArray.length;cnt++){
System.out.print(myArray[cnt] + " ");}//end for loopSystem.out.println("");
}//end doArrays()}// end class
class St{private String name;public St(String name){this.name = name;
}//end constructorpublic String toString(){return name;
}//end toString()}//end class |
What output is produced by the program shown in Listing 3 ?
A. Compiler Error
B. Runtime Error
C. 0 0 0 0 0
0 1 2 3 40 2 4 6 8
D. None of the above | Listing 3 . Listing for Question 3. |
|---|
public class Ap051{
public static void main(String args[]){new Worker().doArrays();
}//end main()}//end class definition
class Worker{public void doArrays(){
int myArray[3][5];for(int i=0;i<myArray.length;i++){
for(int j=0;j<myArray[0].length;j++){myArray[i][j]= i*j;
}//end inner for loop}//end outer for loopfor(int i=0;i<myArray.length;i++){
for(int j=0;j<myArray[0].length;j++){System.out.print(
myArray[i][j] + " ");}//end inner for loop
System.out.println("");}//end outer for loop}//end doArrays()
}// end class |
What output is produced by the program shown in Listing 4 ?
A. Compiler Error
B. Runtime Error
C. 1 1 1 1 1
1 2 3 4 51 3 5 7 9
D. None of the above 
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