Hi, I'm Java6 certified myself, so I guess my best way to get java 11 certified is 1Z0-817. This book covers everything that is needed for that exam right? Or, for me is better to go with OCP Oracle Certified Professional Java SE 11 Programmer II Study Guide? In my daily work I use lambdas and streams, but deeper undersanding is what I expect from this book.
Does the book come with practice or mock tests? how many? how close are these mock tests to the real exam (harder, easier, same?)?
Module system is something I did not even touch, is how hard/deep is this topic?
thanks in advance