Just passed with 85%
Here's how I did it:
About 6 months of experience with java at work
Read Kahlid Mughal's book cover to cover and answered all questions (about a month's time). In my opinion this book is great, maybe a little bit of overkill as far as the test goes but you'll be better java programmer when your done. His tests are probably a bit harder than the actual.
Last but not least, this forum