About Question enthuware.ocajp.i.v7.2.1272 :

[ETS User]

Seems like there's bug here:

"final Object[ ] objArr = { null } ;" should be right answer but answer key suggests otherwise.

[admin]

The question asks for the ones that are NOT valid.

HTH,
Paul.

[jacob]

the use of transient and volatile are not for OCA

[admin]

Objective 2.1 is "Declare and initialize variables"
So you should at least be aware of what these keywords do while declaring variables.

HTH,
Paul.

[SirZed]

native void format( ) ; seems to declare an abstract method, since the method body is missing, but there is also no abstract keyword. Is it legit in a class? If so, when and how?

[admin]

native void format( ) ; seems to declare an abstract method, since the method body is missing, but there is also no abstract keyword. Is it legit in a class? If so, when and how?

It is not an abstract method because there is no abstract keyword. It is a native method, that is why there is no method body. It means it is implemented by a native library and not in java code at that point.

-Paul.

[SirZed]

Okay, thanks!

[fasty23]

Is the sequence of this option correct?
final transient static private double PI = 3.14159265358979323846

can we put private in 4th place?
are the access modifier, static and transient in same level?
Where can I find a document about declaring variable and method sequences?

[admin]

Yes, it is valid. You can easily try it out
Please see this for all the details - http://docs.oracle.com/javase/specs/jls ... jls-3.html

[fasty23]

the explanation mentioned:
Note: a class declaration can have only have final, abstract and public as
modifiers, unless it is a nested class, in which case, it can be declared private
or protected as well.
But we can have a class with no modifier (Default) too, Am I wrong?

[admin]

Yes, you can have no modifier as well. The explanation is talking about valid modifiers only. default is default. It is not a valid modifier.

[evaevaeva]

Technically, the option 'abstract void format( ) ;' is also wrong, since if this method is in a class, the class has to be abstract too...

[admin]

The problem statement doesn't say it has to be a concrete class. An abstract class is a class!