What can be the factors affecting the pass percentage???
I can think of the following:
--> This is an exam for newbies to the java technology
--> The percentage of people that Sun intends to pass out(among all the test givers)
--> The pass percentage they set, does it encourage more newbies to take the exam?
--> How the questions will be selected for evaluation, I mean there were similar questions from the same topic. I think 1 or 2 questions from each such set will be selected unless it is something unique.
--> All other Java exams by Sun are less than 70%
Keeping all these in view, my guess is between 65% to 70%
Like Nick, I think the passing rate should be high so that we can determine that a candidate is really qualified in Java technology in a broad aspect. Since this exam is not part of the Java certification path of Sun, it would not be a big deal, even the passing score is high.
IMO, the official passing score might be between 60% and 70%.
Passing score is not an indicator on the exam quality: High passing scores doesn't men that a passing examinee is very capable since low passing score (65 for example) means very few people get (80+ for example). There are minimum requirements that if someone meet, Sun consider him adaquately capable for the published knowkedge.
CCNA passing score is approx 80+ and this doesn't mean it's harder than Java Programmer exam.