Errors in the K&B bonus exam?

Has anyone else encountered errors in the K&B bonus exam?

I was taking the open book exam, and one questions was creating three long two dimensional arrays, and playing with the elements. The correct answer was D, with the explanation of:

D) compilation error at line 5

D is correct. It is a legal way to create an array of four integers, name 'array'.

There is no 4 dimensional array, and there is no array named 'array'. Also if it is a correct way of creating this array, then compilation error at line 5 is not correct either.

Thanks for your input.

Tim Rawerts

Hi,Tim.

the open book exam? how many questions you do ? the default number of questions are 65 right?

and why dont you type the whole question here for members here to take a look....

i also wonder what were you talking about...

thanks.

Your first two questions make no sense, but here is the question in it's entirety.

public Test{
public static void main(String [] args}
long [][] a1;
long []a2[];

Your first two questions make no sense, but here is the question in it's entirety.

public Test{
public static void main(String [] args)
long [][] a1;
long []a2[];
a2 = new long[3][];
a1 = a2;
System.out.println(a1[1][0]);
}
}

a) 0
b) null
c) compilation error at line 5
d) compilation error at line 6
e) compilaiton error at line 7
f) runtime exeception is thrown at runtime

I chose f. Here is the answer I was given

D is correct. It is a legal way to create an array of four integers, named 'array'.

A,B,C,E,F ar invalid attempts to declare and initialize an array, none of them will compile.

The correct code that compiles is :-

public class Test{
public static void main(String [] args)
{
long [][] a1;
long []a2[];
a2 = new long[3][];
a1 = a2;
System.out.println(a1[1][0]);
}
}

It produces the putput :-

java Test
Exception in thread "main" java.lang.NullPointerException
at Test.main(Test.java:8)

OK, I think people are missing the point. I am not looking for the correct answer, but rather has anyone else found errors in the sample exams?

Tim Rawerts

your demand is confusing me.

Hi Tim,

I spotted a couple of questions with wrong answers while attempting the K&B's MasterExam mocks. I agree with you the answer should be f.

Joyce

Thank you very much Joyce. That is twice now you have helped me out, and I appreciate it.

Tim Rawerts

Hi Tim -

I'm jamming on the 1.5 update right now, so I don't have time to research this, but I think if you go to the Osborne site there is an errata that talks about this error - not sure, just kind of rings a bell. In general, I think the practice exams are very clean - maybe only one or two errors - again this is just what I recall.

HTH,

Bert

Thanks Bert. I think it is way cool that you post here. The book is tremendous, and I have not doubts I will pass the exam tomorrow morning.

Tim Rawerts

I give test on Saturday morning.

all the best to both of us....

hope to hear your result. i'm sure you can pass it easily.

Yes, I remember coming across this buggy question a couple of times when I was doing the practive exams last week...