Java Exception Handling Online Test 2nd, Java Question and Answers, MCQ

Java Exception Handling Test 2 - Java Question and Answers

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Question 1 of 20

1. Question
Which of the following lists exception types from MOST specific to LEAST specific?
- Error, Exception
- Exception, RunTimeException
- Throwable, RunTimeException
- ArithmeticException, RunTimeException
Correct

Incorrect
Question 2 of 20

2. Question
From which problems is it possible for a program to recover?
- Errors
- Exceptions
- Both errors and exceptions
- Neither.
Correct

Incorrect
Question 3 of 20

3. Question
Which statement is FALSE about catch{} blocks?
- There must be only one catch{} block in a try/catch structure.
- The catch{} block for a child exception class must PRECEED that of a parent execption class.
- The catch{} block for a child exception class must FOLLOW that of a parent execption class.
- If there is no catch{} block there must be a finally{} block.
Correct

Incorrect
Question 4 of 20

4. Question
What happens in a method if an exception is thrown in a try{} block and there is NO MATCHING catch{} block?
- This is not legal, so the program will not compile.
- The method throws the exception to its caller, exactly if there were no try{} block.
- The program halts immediately.
- The program ignores the exception.
Correct

Incorrect
Question 5 of 20

5. Question
When is a finally{} block executed?
- Only when an unhandled exception is thrown in a try{} block.
- Only when any exception is thrown in a try{} block.
- Always after execution has left a try{} block, no matter for what reason.
- Always just as a method is about to finish.
Correct

Incorrect
Question 6 of 20

6. Question
What type of exception is thrown by parseInt() if it gets illegal data?
- ArithmeticException
- RunTimeException
- NumberFormatException
- NumberError
Correct

Incorrect
Question 7 of 20

7. Question
How many finally{} blocks may there be in a try/catch structure?
- There must always be one, following the last catch{} block.
- There can be zero or one immediately after each catch{} block.
- There can be zero or one, following the last catch{} block.
- There can be any number, following the last catch{} block.
Correct

Incorrect
Question 8 of 20

8. Question
Is a program required to catch all exceptions that might happen?
- No. You can write a program to catch just the exceptions you want.
- No. But if a program catches one type of exception it must catch all other types as well.
- Yes. If a program is not written to catch all exceptions it will not compile.
- Yes. A program can not do I/O unless it catches all exceptions.
Correct

Incorrect
Question 9 of 20

9. Question
Both class Error and class Exception are children of this parent:
- Throwable
- Catchable
- Runable
- Problem
Correct

Incorrect
Question 10 of 20

10. Question
Which statement is FALSE about the try{} block?
- Some of the statements in a try{} block will never throw an exception.
- The statements in a try{} block may throw several types of exception.
- The statements in a try{} block cannot include a loop.
- The try{} block must be before the catch{} blocks.
Correct

Incorrect
Question 11 of 20

11. Question
What type of exception is thrown by parseInt() if it gets illegal data?
- NumberFormatException
- NumberError
- ArithmeticException
- RunTimeException
Correct

If parseInt() method gets illegal data which cannot be parsed to Integer it throws NumberFormatException exception.

Incorrect

If parseInt() method gets illegal data which cannot be parsed to Integer it throws NumberFormatException exception.
Question 12 of 20

12. Question
Is the following code legal?

try {
} finally {
}
- YES
- NO
Correct

Above code snippet is legal. It will be executed without doing anything.
try block can be used with either catch block or finally block or both.

Incorrect

Above code snippet is legal. It will be executed without doing anything.
try block can be used with either catch block or finally block or both.
Question 13 of 20

13. Question
Will this code compile?
try {

} catch (Exception e) {

} catch (ArithmeticException a) {

}
- YES
- NO
Correct

The above code sippet will not compile as the sequence of catch should be subclass Exception to super class Exception.

Incorrect

The above code sippet will not compile as the sequence of catch should be subclass Exception to super class Exception.
Question 14 of 20

14. Question
Which statement is TRUE about the try{} block?
- The try{} block can appear after the catch{} blocks.
- The try{} block can contain loops or branches.
- The statements in a try{} block can only throw one exception type and not several types.
- It is mandatory for statements in a try{} block to throw at least one exception type.
Correct

“The try{} block can contain loops or branches.” is the correct option.
The syntax of try-catch block is :-

try{
// code snippet here
}catch(Exception e){
}finally{
}

Incorrect

“The try{} block can contain loops or branches.” is the correct option.
The syntax of try-catch block is :-

try{
// code snippet here
}catch(Exception e){
}finally{
}
Question 15 of 20

15. Question
When is a finally{} block executed?
- Always after execution has left a try catch{} block, no matter for what reason.
- Only when an unhandled exception is thrown in a try{} block.
- Always just as a method is about to finish.
- Only when any exception is thrown in a try{} block.
Correct

finally block is executed after try block irrespective of wheter the exception occured or not.

Incorrect

finally block is executed after try block irrespective of wheter the exception occured or not.

Question 16 of 20

16. Question

For the given code snippet :-

public class MyProgram {
public static void main(String args[]){
try {
System.out.print(“Hello world”);
}
finally {
System.out.println(“Finally executing”);
}
}
}

What is the result?

Hello world Finally executing
Hello world.
Nothing. The program will not compile because no exceptions are specified.
Nothing. The program will not compile because no catch clauses are specified.

Correct

Output of above code snippet is “Hello world Finally executing“. First try block is executed and then finally block is executed.

Incorrect

Output of above code snippet is “Hello world Finally executing“. First try block is executed and then finally block is executed.

Question 17 of 20

17. Question

What is the result of compiling and executing the below code?

public class TryTest {
public static void main(String[] args)
{
try
{
return;
}
finally
{
System.out.println(“Finally”);
}
}
}

Finally
Compilation Error
Runtime Error
Outputs nothing

Correct

finally block is executed everytime. The only way to escape finally is to call System.exit().

Hence for above code snippet “Finally” is printed.

Incorrect

finally block is executed everytime. The only way to escape finally is to call System.exit().

Hence for above code snippet “Finally” is printed.

Question 18 of 20

18. Question

What will be the output?

public class Test2{
public static void main(String args[]){
System.out.println(method());
}
public static int method(){
try{
throw new Exception();
return 1;
}
catch(Exception e){
return 2;
}
finally{
return 3;
}
}
}

Choose the one below:

Compile Time Error
3
2
1

Correct

In the above code snippet an exception is thrown at line 6 which will give a compile time error because compiler will never be able to execute line 7 and report as unreachable code as an error.

Incorrect

In the above code snippet an exception is thrown at line 6 which will give a compile time error because compiler will never be able to execute line 7 and report as unreachable code as an error.

Question 19 of 20

19. Question

What will be the output?

public class Test2{
public static void main(String args[]){
System.out.println(method());
}
public static int method(){
try{
throw new Exception();
}
catch(Exception e){
return 2;
}
finally{
return 3;
}
}
}

Choose the one below:

2
Compile Time Error
3
1

Correct

finally block is executed everytime. The only way to escape finally is to call System.exit().
When above code snippet is executed “3” is displayed because at last finally is executed and it returns 3.

Incorrect

Question 20 of 20

20. Question

What will be the output?

import java.io.IOException;
public class Test5{
public static void main(String args[]){
try{
throw new IOException();
}
catch(Exception e){
System.out.println(“Excepion”);
}
catch(IOException e){
System.out.println(“IOExcepion”);
}
}
}

Choose the one below:

IOException
Compilers error
Exception
Exception IOException

Correct

The above code sippet will not compile as the sequence of catch should be subclass Exception to super class Exception.

Incorrect

The above code sippet will not compile as the sequence of catch should be subclass Exception to super class Exception.

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