I got success

I started preparing for the exam 2 months ago but not very intensively - my preparation plan was to work on 3 to 4 chapters of the textbook a week. I also used other books but there were no exercises there. I started testing my understanding at www.analyticsexam.com 1 month before the actual exam, I took 12 tests in total and they proved to be very helpful. The exam questions were similar although please beware of the small differences that might be misleading. There were also some questions with the free text field (eg how many variables in the output data set or how many observations). If you are not sure about the answer please take your time to think how SAS operates and what the values are at the compilation phase. It is very important to understand SAS mechanics in order to pass the test.
Good luck to you all!