Java Multiple Choice Questions & Answers on Exceptions Types for Freshers

1. Which of these is a super class of all exceptional type classes?

a) String
b) RuntimeExceptions
c) Throwable
d) Cachable

Answer: c

Explanation: All the exception types are subclasses of the built in class Throwable.

2. Which of these class is related to all the exceptions that can be caught by using catch?

a) Error
b) Exception
c) RuntimeExecption
d) All of the mentioned

Answer: b

Explanation: Error class is related to java run time error that can’t be caught usually, RuntimeExecption is subclass of Exception class which contains all the exceptions that can be caught.

3. Which of these class is related to all the exceptions that cannot be caught?

a) Error
b) Exception
c) RuntimeExecption
d) All of the mentioned

Answer: a

Explanation: Error class is related to java run time error that can’t be caught usually, RuntimeExecption is subclass of Exception class which contains all the exceptions that can be caught.

4. Which of these handles the exception when no catch is used?

a) Default handler
b) finally
c) throw handler
d) Java run time system

Answer: a

5. Which of these keywords is used to manually throw an exception?

a) try
b) finally
c) throw
d) catch

Answer: c

6. What is the output of this program?

1.     class exception_handling {

2.         public static void main(String args[]) {

3.             try {

4.                 System.out.print("Hello" + " " + 1 / 0);

5.             }

6.             finally {

7.          System.out.print("World");         

8.             }

9.         }

10.     }

a) Hello
b) World
c) Compilation Error
d) First Exception then World

Answer: d

7. What is the output of this program?

1.     class exception_handling {

2.         public static void main(String args[]) {

3.             try {

4.                 int a, b;

5.                 b = 0;

6.                 a = 5 / b;

7.                 System.out.print("A");

8.             }

9.             catch(ArithmeticException e) {

10.          System.out.print("B");         

11.             }

12.         }

13.     }

a) A
b) B
c) Compilation Error
d) Runtime Error

Answer: b

8. What is the output of this program?

1.     class exception_handling {

2.         public static void main(String args[]) {

3.             try {

4.                 int a[] = {1, 2,3 , 4, 5};

5.                 for (int i = 0; i < 7; ++i) 

6.                     System.out.print(a[i]);

7.             }

8.             catch(ArrayIndexOutOfBoundsException e) {

9.          System.out.print("0");         

10.             }

11.         }

12.     }

a) 12345
b) 123450
c) 1234500
d) Compilation Error

Answer: b

Explanation: When array index goes out of bound then ArrayIndexOutOfBoundsException exceptio is thrown by the system.

9. What is the output of this program?

1.     class exception_handling {

2.         public static void main(String args[]) {

3.             try {

4.                 int i, sum;

5.                 sum = 10;

6.                 for (i = -1; i < 3 ;++i)

7.                     sum = (sum / i);

8.             }

9.             catch(ArithmeticException e) {

10.          System.out.print("0");         

11.             } 

12.             System.out.print(sum);

13.         }

14.     }

a) 0
b) 05
c) Compilation Error
d) Runtime Error

Answer: c

Explanation: Since sum is declared inside try block and we are trying to access it outside the try block it results in error.

10. What is the output of this program?

1.     class exception_handling {

2.         public static void main(String args[]) {

3.             try {

4.                 int a[] = {1, 2,3 , 4, 5};

5.                 for (int i = 0; i < 5; ++i) 

6.                     System.out.print(a[i]);

7.                 int x = 1/0;

8.             }

9.             catch(ArrayIndexOutOfBoundsException e) {

10.          System.out.print("A");         

11.             }

12.             catch(ArithmeticException e) {      

13.                 System.out.print("B");

14.             }

15.         }

16.     }

a) 12345
b) 12345A
c) 12345B
d) Comiplation Error

Answer: c

Explanation: There can be more than one catch for a single try block. Here Arithmetic exception(/ by 0) occurs instead of Array index out of bound exception, so 2nd catch block is executed.