First of all i would like to thanks this community for all the information posted on this forum.
All my information about exams preparation i obtained from here.
I started to prepare for this certification an the end of July this year immediately after taking OCJP6 and i had 1 mount of pause for holidays and some job interviews. I didn't had so much time to prepare (maximum 3/4 hour per day). I read HF2 only once and invested in the Enthuware mocks (my average score is around 80%). Also read some servelet 3.0 specification fragments and took Nullhaus mock a day before the exam.
Because i was really time pressed (i obtained that job and for following months i will be very busy) i decided to take my chances. I am sure a i could have done better the 80% on the real exam if only i had reviewed my answers ... but i wasn't in good mood and with all the risks i clicked finish.
I don't know if is important regarding the exam preparation but i had a little more than one year of job development experience background in servlets and jsps.
Can you share your opinion about the complexity of the questions? Were they harder than the Enthuware mock exams?
I am curious if you bought Enthuware mock exams for previous version 5 too? I was thinking of buying both versions in order to practice a little more, but do you think that tests for version 6 are enough.
If you have some more spare minutes I would be glad to hear know how many questions did you get about asynchronous processing and were they involved and tricky.
I bought Enthuware for 1Z0-894 OCE Java EE 6 JSP and Servlet Developer Exam. A lot of the exam question where similar with Enthuware mocks (somewhere around 70%) and i appreciate the difficulty levels as being also very similar. I don't remember the precise number of questions about asynchronous processing but there weren't more than 10 and most of the tricks are covered by Nullhaus and Enthuware. I believe that HF2, Enthuware and Nullhaus mocks are just enough to pass this exam on the fly, much better that i did. Just take your time with missed questions and be sure you understand the subject and why you failed (i didn't, that the explanation for my score).