About Question enthuware.ocajp.i.v8.-2-.2015 :

[BrentCoetzee]

The answer would give an java.lang.ArrayIndexOutOfBoundsException: 5

[BrentCoetzee]

I believe the answer should be:

int[][] matrix = new int[5][4];
for(int i=0;i<5; i++) matrix[1]  = 1;

[admin]

Why do you believe so? Specifically, what makes you think that matrix[1] = 1; is valid?
Try compiling and running the code exactly as given in the question/option.

[BrentCoetzee]

Apologies, there should be before [1]

[BrentCoetzee]

When posting a square bracket with letter i inside,it is removed as soon as i submit the post.

[BrentCoetzee]

Apologies, I made a mistake the answer to the question is correct in your material. DUH moment for me.