I have the OCJP6.0 normally I can see in the forums what are the most difficult and important topics that exam will test. From you expertise and point of view what are the most important topics that people should master in order to pass the exam. Also what would you said is the more tricky or difficult topic in the exam in which we need to pay a lot of attention.
Do you explain about the format of the exam in your book, for example in Java6 was a style of "Select 2 of 4", not sure if this exam will have the format "Select all that apply" ?
I see that there is a difference id for the exam for people that want to upgrade from java6 certification, any tips or recommendation coming from this path.