Not a great score, but hey, it definitely works for me.
Passed OCA in March 2018 (85%), and this year I've decided to go a step further. For the exam, I've studied for ~6 months with the exception of a few weeks vacation time. The entire endevor is really much harder than OCA. FIrst of all the material is almost twice as much.
Main books I've studied from were Jeanne Boyarsky & Scott Selikoff's "OCP: Oracle Certified Professional Java SE 8 Programmer II Study Guide" and "Java 8 Lambdas" by Richard Warburton. There were other Java books I've read in between (like Effective Java 3rd edition by Joshua Bloch) but not strictly related to the certification exam. As I did last time, I used the mock tests from Enthuware, which were of a tremendous help. My test results were:
Test 1: 76%
Test 2: 77%
Test 3: 70%
Test 4: 76%
Test 5: skipped
Final Day Test: 64% (Yes, I've failed on this test, one day before the actual exam )
The exam itself was hard as expected: lots of questions for only 2.5 hours. But in the end it's all good. I've finished 8 minutes before the time ran out, and I had to review ~20 marked questions. I've only managed to look at 10 random ones.
At any rate, I'm happy to have passed it. Not sure which or if I'll take another Oracle certification in the future. Not for a while at least.