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Name:_______________________
Covers chapters 9-17
Final Exam
CSCI 1302 Introduction to Programming
Armstrong Atlantic State University
Instructor: Dr. Y. Daniel Liang
Please note that the university policy prohibits giving the exam score by email. If you need to know your
final exam score, come to see me during my office hours next semester.
I pledge by honor that I will not discuss the contents of this exam with
anyone.
Signed by ___________________ Date ___________________
1. Design and implement classes. (10 pts)
Design a class named Person and its two subclasses named Student and
Employee. Make Faculty and Staff subclasses of Employee. A person has a
name, address, phone number, and email address. A student has a class
Draw the UML diagram for the classes. Write the code for the Student
class only.
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2. Design and use interfaces (10 pts)
Write a class named Octagon that extends GeometricObject
and implements the Comparable and Cloneable interfaces.
Assume that all eight sides of the octagon are of equal
size. The area can be computed using the following formula:
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3. Design and create GUI applications (10 pts)
Write a Java GUI program to add two numbers from text fields, and
displays the result in a non–editable text field. A sample run of
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4. Text I/O (10 pts)
Write a program that will count the number of characters (excluding
5. Multiple Choice Questions: (1 pts each)
(1. Mark your answers on the sheet. 2. Login and click Take
Instructor Assigned Quiz for QFinal. 3. Submit it online
within 5 mins. 4. Close the Internet browser.)
1. _________ describes the state of an object.
a. data fields
b. methods
c. constructors
d. none of the above
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2. An attribute that is shared by all objects of the class is coded
using ________.
a. an instance variable
b. a static variable
c. an instance method
d. a static method
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3. If a class named Student has no constructors defined explicitly,
the following constructor is implicitly provided.
a. public Student()
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4. If a class named Student has a constructor Student(String name)
defined explicitly, the following constructor is implicitly provided.
a. public Student()
b. protected Student()
c. private Student()
d. Student()
e. None
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5. Suppose the xMethod() is invoked in the following constructor in
a class, xMethod() is _________ in the class.
public MyClass() {
xMethod();
}
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xMethod();
}
a. a static method
b. an instance method
c. a static or an instance method
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7. What would be the result of attempting to compile and
run the following code?
public class Test {
static int x;
public static void main(String[] args){
System.out.println(“Value is ” + x);
}
}
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8. Analyze the following code:
public class Test {
private int t;
public static void main(String[] args) {
Test test = new Test();
System.out.println(test.t);
}
}
a. The variable t is not initialized and therefore causes errors.
b. The variable t is private and therefore cannot be accessed in the
main method.
c. Since t is an instance variable, it cannot appear in the static
main method.
d. The program compiles and runs fine.
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public static void main(String[] args) {
int[] x = new int[3];
System.out.println(“x[0] is “+x[0]);
}
}
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11. How can you get the word “abc” in the main method from the
following call?
java Test “+” 3 “abc” 2
a. args[0]
b. args[1]
c. args[2]
d. args[3]
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12. Which code fragment would correctly identify the number of
arguments passed via the command line to a Java application,
excluding the name of the class that is being invoked?
a. int count = args.length;
b. int count = args.length – 1;
c. int count = 0; while (args[count] != null) count ++;
d. int count=0; while (!(args[count].equals(“”))) count ++;
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13. Show the output of running the class Test in the following code
lines:
interface A {
void print();
}
}
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a. Nothing.
b. b is an instance of A.
c. b is an instance of C.
d. b is an instance of A followed by b is an instance of C.
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14. When you implement a method that is defined in a superclass, you
__________ the original method.
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15. What modifier should you use on a variable so that it can only be
referenced inside its defining class.
a. public
b. private
c. protected
d. Use the default modifier.
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16. What is the output of running class C?
class A {
public A() {
System.out.println(
“The default constructor of A is invoked”);
}
}
a. none
b. “The default constructor of B is invoked”
c. “The default constructor of A is invoked” followed by “The
default constructor of B is invoked”
d. “The default constructor of A is invoked”
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17. Analyze the following program.
class Test {
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public static void main(String[] args) {
try {
String s = “5.6”;
Integer.parseInt(s); // Cause a NumberFormatException
int i = 0;
int y = 2 / i;
System.out.println(“Welcome to Java”);
}
catch (Exception ex) {
System.out.println(ex);
}
}
}
a. An exception is raised due to Integer.parseInt(s);
b. An exception is raised due to 2 / i;
c. The program has a compilation error.
d. The program compiles and runs without exceptions.
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18. What is displayed on the console when running the following
program?
class Test {
public static void main(String[] args) {
}
}
a. The program displays Welcome to Java three times followed by End
of the block.
b. The program displays Welcome to Java two times followed by End of
the block.
c. The program displays Welcome to Java three times.
d. The program displays Welcome to Java two times.
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19. To append data to an existing file, use _____________ to construct a
FileOutputStream for file out.dat.
a. new FileOutputStream(“out.dat”)
b. new FileOutputStream(“out.dat”, false)
c. new FileOutputStream(“out.dat”, true)
d. new FileOutputStream(true, “out.dat”)
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20. After the following program is finished, how many bytes are written to the
file t.dat?
import java.io.*;
public class Test {
public static void main(String[] args) throws IOException {
DataOutputStream output = new DataOutputStream(
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