Alfonso Saenz wrote:I have seen that Java SE 7 Programmer II exam has 65 questions in 150 minutes and Java SE 8 Programmer II exam has 85 questions using same time.
As of now. Oracle fiddles with this regularly.
Alfonso Saenz wrote:Could you please give me light about the difference of questions type between both and whether questions on 1Z0-809 are more oriented to concrete concepts instead of code snippet analysis?
Both exams are largely code snippet analysis. Some of the topics on the OCP 7 are longer code snippets. For example, the code to walk a file directory or listen for changes on the file system can get fairly long.
Alfonso Saenz wrote:Could we say 1Z0-809 is easier than 1Z0-804?
I think it is. But that's because of the material. I did about the same on both exams though.
Alfonso Saenz wrote:Finally: is your new book: OCP: Oracle Certified Professional Java SE 8 Programmer II Study Guide: Exam 1Z0-809 adapted to this kind of "short" questions?
No. Our book tried to be harder than the exam to make sure you understand the correct answers and also so that you can recognize them quickly. There's a good change Oracle will change the number of questions on the OCP 8 over time.
In fact, Oracle lowered the number of questions on the OCP 7 last year. I suspect they did it because they wanted more people to pass the exam. Sometimes Oracle changes the number of questions on an exam by a very small number. This can't be to accommodate "types" of questions.
As Jeanne pointed out, Oracle often "changes" the number of questions, length of time for the exam, and even the objectives. We put together an information page to track these changes on our blog: http://selikoff.net/ocp
You can also review the objectives on Oracle's exam page. Just be aware, Oracle does change these from time to time... frustrating we know!