Exception Handling MCQ in Java

This section of our 1000+ Java MCQs focuses on exception handling of Java Programming Language.

1. When does Exceptions in Java arises in code sequence?
a) Run Time
b) Compilation Time
c) Can Occur Any Time
d) None of the mentioned
View Answer

Answer: a
Explanation: Exceptions in Java are run-time errors.

2. Which of these keywords is not a part of exception handling?
a) try
b) finally
c) thrown
d) catch
View Answer

Answer: c
Explanation: Exceptional handling is managed via 5 keywords – try, catch, throws, throw and finally.

3. Which of these keywords must be used to monitor for exceptions?
a) try
b) finally
c) throw
d) catch
View Answer

Answer: a
Explanation: None.

4. Which of these keywords must be used to handle the exception thrown by try block in some rational manner?
a) try
b) finally
c) throw
d) catch
View Answer

Answer: d
Explanation: If an exception occurs within the try block, it is thrown and cached by catch block for processing.

5. Which of these keywords is used to manually throw an exception?
a) try
b) finally
c) throw
d) catch
View Answer

Answer: c
Explanation: None.

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6. What will be the output of the following Java program?

```
    class exception_handling 
```
```
    {
```

        public static void main(String args[])

```
        {
```
```
            try 
```
```
            {
```

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

```
            }
```

            catch(ArithmeticException e)

```
            {
```

        	System.out.print("World");

```
            }
```
```
        }
```
```
    }
```

a) Hello
b) World
c) HelloWorld
d) Hello World
View Answer

Answer: b
Explanation: System.ou.print() function first converts the whole parameters into a string and then prints, before “Hello” goes to output stream 1 / 0 error is encountered which is cached by catch block printing just “World”.
Output:

$ javac exception_handling.java
$ java exception_handling
World

7. What will be the output of the following Java program?

```
    class exception_handling 
```
```
    {
```

        public static void main(String args[])

```
        {
```
```
            try 
```
```
           {
```
```
                int a, b;
```
```
                b = 0;
```
```
                a = 5 / b;
```
```
                System.out.print("A");
```
```
            }
```

            catch(ArithmeticException e)

```
            {
```

        	System.out.print("B");

```
            }
```
```
        }
```
```
    }
```

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

Answer: b
Explanation: None.
Output:

$ javac exception_handling.java
$ java exception_handling
B

8. What will be the output of the following Java program?

```
    class exception_handling 
```
```
    {
```

        public static void main(String args[])

```
        {
```
```
            try 
```
```
            {
```
```
                int a, b;
```
```
                b = 0;
```
```
                a = 5 / b;
```
```
                System.out.print("A");
```
```
            }
```

            catch(ArithmeticException e)

```
            {
```

        	System.out.print("B");

```
            }
```
```
            finally 
```
```
            {
```
```
    	        System.out.print("C");
```
```
            }
```
```
        }
```
```
    }
```

a) A
b) B
c) AC
d) BC
View Answer

Answer: d
Explanation: finally keyword is used to execute the code before try and catch block end.
Output:

$ javac exception_handling.java
$ java exception_handling
BC

9. What will be the output of the following Java program?

```
    class exception_handling 
```
```
    {
```

        public static void main(String args[])

```
        {
```
```
            try 
```
```
            {
```
```
                int i, sum;
```
```
                sum = 10;
```

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

```
                    sum = (sum / i);
```
```
            }
```

            catch(ArithmeticException e)

```
            {
```

        	System.out.print("0");

```
            } 
```
```
            System.out.print(sum);
```
```
        }
```
```
    }
```

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

Answer: c
Explanation: Value of variable sum is printed outside of try block, sum is declared only in try block, outside try block it is undefined.
Output:

$ javac exception_handling.java
Exception in thread "main" java.lang.Error: Unresolved compilation problem: 
	sum cannot be resolved to a variable

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