Nope, only two questions on security if memory serves me. Those questions are thought to be about applets. Who uses applets anymore anyway? Sun's tutorials have some very good material on security.
I concur with Rufus. Buying a dedicated book on Java Security for the SCEA exam is overkill. Online resources will suffice. You may however benefit professionally by reading this book, it just doesn't make a much of a diffference for the exam.