1) What is the output of the following Java program?
public class ExceptionExample {
public static void main(String[] args) {
try {
String str = null;
System.out.println(str.length());
} catch (NullPointerException e) {
System.out.println("NullPointerException occurred.");
} finally {
System.out.println("End of program.");
}
}
}
A) NullPointerException occurred. End of program.
B) End of program.
C) The program will terminate with an error.
D) NullPointerException occurred.
Answer: D
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2) What is the output of the following Java program?
public class ExceptionExample {
public static void main(String[] args) {
try {
int[] nums = {1, 2, 3};
System.out.println(nums[3]);
} catch (ArrayIndexOutOfBoundsException e) {
System.out.println("ArrayIndexOutOfBoundsException occurred.");
} finally {
System.out.println("End of program.");
}
}
}
A) ArrayIndexOutOfBoundsException occurred. End of program.
B) End of program.
C) The program will terminate with an error.
D) ArrayIndexOutOfBoundsException occurred.
Answer: A
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3) What is the output of the following Java program?
public class ExceptionExample {
public static void main(String[] args) {
try {
int num1 = Integer.parseInt(args[0]);
int num2 = Integer.parseInt(args[1]);
int result = num1 / num2;
System.out.println("The result is: " + result);
} catch (ArithmeticException e) {
System.out.println("Cannot divide by zero.");
} catch (ArrayIndexOutOfBoundsException e) {
System.out.println("Please provide two integers as command-line
arguments.");
} catch (NumberFormatException e) {
System.out.println("Please provide valid integers as command-line
arguments.");
} finally {
System.out.println("End of program.");
}
}
}
What will be the output of the program if it is executed with the command java
ExceptionExample 5 0?
A) Cannot divide by zero. End of program.
B) Please provide two integers as command-line arguments. End of program.
C) Please provide valid integers as command-line arguments. End of program.
D) The program will terminate with an error.
Answer: A
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4) What is the output of the following Java program?
public class ExceptionExample {
public static void main(String[] args) {
try {
int num = Integer.parseInt("abc");
System.out.println("The number is: " + num);
} catch (NumberFormatException e) {
System.out.println("NumberFormatException occurred.");
} finally {
System.out.println("End of program.");
}
}
}
A) NumberFormatException occurred. End of program.
B) End of program.
C) The program will terminate with an error.
D) NumberFormatException occurred.
Answer: D
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5) What is the output of the following Java program?
public class ExceptionExample {
public static void main(String[] args) throws Exception {
int num = 10;
if (num > 5) {
throw new Exception("Invalid number.");
}
System.out.println("End of program.");
}
}
A) Invalid number.
B) End of program.
C) The program will terminate with an error.
D) Invalid number. End of program.
Answer: A
6) What is the output of the following Java program?
public class Main {
public static void main(String[] args) {
try {
int[] arr = new int[5];
arr[10] = 15;
} catch (ArrayIndexOutOfBoundsException e) {
System.out.println("Exception caught: " + e.getMessage());
} finally {
System.out.println("Finally block executed.");
}
}
}
7) What is the purpose of this program?
A. To create an array of integers
B. To set the value of the 10th element in an array to 15
C. To catch an ArrayIndexOutOfBoundsException if it occurs
D. To execute a finally block after the try and catch blocks
Answer: C
8) What is an exception in Java?
A. A condition that occurs when a program runs successfully
B. A condition that occurs when a program fails to compile
C. A condition that occurs when a program runs into an error or unexpected
situation
D. A condition that occurs when a program is executed in debug mode
Answer: C
9) What is the purpose of the try block in this program?
A. To define the code that may throw an exception
B. To define the code that should always be executed
C. To define the code that should be executed if an exception is caught
D. To define the code that should be executed regardless of whether an exception is
caught or not
Answer: A
10) What is the purpose of the finally block in this program?
A. To define the code that may throw an exception
B. To define the code that should always be executed
C. To define the code that should be executed if an exception is caught
D. To define the code that should be executed regardless of whether an exception is
caught or not
Answer: D
CODING PROGRAMS :
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EXCEPTION HANDLING LAB EXERCISE STAGE-1
========================================
1. Exception and Messages�
a. Write a program to create a class �SimpleExceptionDemo� ,which implements main
method.
b. This program should read two integer numbers for the variables a and b from
console using Scanner class.
c. If you enter any other character except number (0 - 9 ) then the error is caught
by InputMisMatchException object.
d. After that using following methods print the information about the error
occurring causes in the console. getMessages() printStackTrace() println()
toString()
2. ArrayIndexOutOfBoundException�
a. Write a program to create a class �ArrayIndexExceptionDemo� which implements
main method.
b. Inside main method create an array of int type as follows.
int a[] = new int[2];
c. Now try to print the value of a[3] in the console where handle the Exceptions
coming from this line using try catch.
d. In the catch block handle this exception using ArrayIndexOutOfBound Exception
and print appropriate message in the console from this Exception.
3. IllegalStateException�
a. Write a program to create a class �IllegalStateExceptionDemo� which implements a
method as follows static void throwIllegalException( ) { try{ throw new
IllegalStateException("MyException"); } catch(IllegalStateException objA)
{ System.out.println("caught:" +objA); } }
b. Implement the main method, and from main method call the above method.
c. Check the output of the program.
4. ClassNotFoundException�
a. Write a program to create a class �ClassNotFoundExpDemo� which implements
default constructor as follows ,
public ClassNotFoundExpDemo { Class c; try { c = Class.forName("TestClass"); }
catch (ClassNotFoundException e) { // deal with the exception here ...
e.printStackTrace(); } }
b. Implement the main method and inside main method create an object of
ClassNotFoundExpDemo class.
c. Now check the O/P.
