Just took the first time exam on Friday and got a score of 55%. I didn't expect so many questions of io. It even asked how to append a stream to an existing file.
I have been using RHE and Mughal but these two books, occuring to me, do not cover the enough deails for the exam. Mughal is hard to digest in terms of reading. RHE is way too easy to be ready for the exam.
I think, for me to try it again, I will spend more time to do more mock exams. just got a copy of JQPlus. Thinking about waiting for two more weeks to take it again.