Obviously all relevant topics may be tested on the OCAJP 8 exam, but are there any topics in particular which are almost surely to be asked, or topics that are covered by multiple questions?
Thanks in advance.
I know that you have used Mala Gupta's OCAJP 8 book, so I'd say let that be your guide.
Just maybe, you are asking about this quote from Sybex end of Chapter 2 Operators and Statements:
This chapter is especially important because at least one component of this chapter will likely appear in every exam question with sample code. Many of the questions on the exam focus on proper syntactic use of the structures, as they will be a large source of questions that end in “Does not compile."
(I'd say that you may want to ensure you cover those items in your book.)