Ques form a Mock Exam

[Manish Poddar]

Hi,
the following question is in Mock exam @ http://valiveru.tripod.com/java/jvaltest.html
Question 2.
Given that method aMethod() throws BaseException, SubException and RuntimeException of the following exception hierarchy
java.lang.Exception
|
+ - - BaseException
|
+ - - SubException
|
+ - - java.lang.RuntimeException

Which of the following are legal

A.public class MyClass {
public void myMethod(){
aMethod();
}
}
B.public class MyClass{
public void myMethod() throws BaseException,RuntimeException{
aMethod();
}
}
C.public class MyClass{
public void myMethod() throws BaseException{
aMethod();
}
}
D.public class MyClass{
public void myMethod() throws Exception{
aMethod();
}
}
E.public class MyClass{
public void myMethod() throws RuntimeException {
aMethod();
}
}
Could anyone please suggest the right answers with explanations.
Thanks
Manish

[jafarali]

Answer C looks correct for me
As the all exceptions like BaseException ... are extended from Exception, throwing 'Exception' will be enough to mention all of them.
Sorry for my bad english

[Ajith Kallambella]

jafarali, I think you meant to say D ??
Ajith

[Aru]

Hi all,
So ultimately which is the correct answer ....is it "D" ?

Aruna

[Manish Poddar]

The answer given at the abovesaid site is C and E !!!

[mita]

Hi,
How can e be correct as it throws runtime exception & the other exceptions are not caught or thrown.
Please make it clear.
Thanks
mita

[Ranjan Sarangi]

Hello Friends
My answer would be C and D. That means either of them will suffice. Agreed that only D also suffices coz it specifies mother of all exceptions.
Just read the Question. "Which of the following ARE legal?". So I would add C to the answer also.
E is definitely not correct. Bcoz E catches only RuntimeException which is, as all of us know, redundant and more importantly it ignores the BaseException and Exception which are bound to be caught/declared in this case.
Any affirmation?

[Deepak M]

Originally posted by Ranjan Sarangi:
Hello Friends
My answer would be C and D.

I agree with u .
But did any of u check out option B.
It throws BaseException which covers SubException as well !
By the way the exception hierarchy is :
java.lang.Exception
   |
   + - - BaseException
     |
     + - - SubException
  |
  + -java.lang.RuntimeException
[This message has been edited by Deepak M (edited July 19, 2000).]

[Anonymous]

Deepak,
BaseException certainly catches the SubException , but what about RunTimeException... It is not the subclass of BaseException, So that makes B an illegal option.
Corrections??

[Raghavendra Holla]

If Exception Hierarcay is what Deepak given then B ,C & D are correct. You need not to mention RuntimeException, because it's implesit that all method will throw RuntimeException. Need not to mension again.
Am I correct?.
Regards,
Holla.

[Nirmala]

Holla,

If Exception Hierarcay is what Deepak given then B ,C & D are correct. You need not to mention RuntimeException, because it's implesit that all method will throw RuntimeException. Need not to mension again.
Am I correct?.
Regards,
Holla.

If you say 'RuntimeException' need not to mension then,the answer 'C,D' enough right?. In 'C' it covers 'BaseException'.
My answer is 'C','D'
Any comments?

Thanks
Nirmala

[Anonymous]

Which one is the correct exception hierarchy.
I think if hierarchy mentioned by Manish is correct then only ans D should be write.
Ans A is incorrect
Ans B & C are incorrect as they are not taking care of SubException.( In Ans B declaring Runtime Exception is not necessary, as RuntimeExceptions are not checked exception, Please refer to RHE page 145-146)
Ans D is correct as it takes care of both Base and Sub Exception.
Ans E is incorrect as it is not handling Base and Sub Exception.
If exception hierarchy is as per Deepak then
ans B C D should be write.
Correct me if I am wrong.