My course of study was approximately two months, mainly studying on the way to and from work by public transport, and in the evening at home.
I started studying for the whole book "Oracle Certified Associate Java SE 8 Programmer The Study Guide: J.Boyarsky and S.Selikoff", just finished, I took 2 Enthuware test with a score of 73% and 75%
After this I started study the book "OCA OCA / OCP Java SE 7 Programmer I & II Study Guide by K & B", After, I took another 2 Enthuware test and my scores have risen to 80% and 83%
Finally, I read quickly even a few chapters of the book "Java SE 7 OCA Certification Guide Prepare for the 1zo-803 exam by Mala Gupta" and I have to say that used along with other texts is very very useful.
Three days before the exam I did the last two Enthuware standard test and a Last Day Test, with score of 78%, 79% and 88%, I used the last two days before the exam to revise the topics where I obtained a lower score.
In certification testing I got a score of 92%, the actual test it seemed to be easier than the Enthuware tests, so I lost time looking for tricks of questions that seemed too simple.
The time of 2 hours was more than enough, I started answering all the questions, mark for review those on which I was not really quite sure, in the end, after about 1 hour and 30 had finished and marked about 20 questions, I have used another 30 minutes to cover all marked questions and finished the test.
Thanks to this forum and to all of its users, read your certification stories gave me a great motivation