when going for a latest version exam...
If you already have older version of
SCJP or other, do you think taking the complete exam of a later version gives you more percentage for passing?
complete exam:
more questions that you already know, can help pull up your passing mark (if you get lots of wrong in new topics).
upgrade exam:
you will be tested only on new topics, higher percentage of wrong answers.
Certified JA, JP5, WCD5, BCD6