Just want to share my good news with you all .
I passed exam IZ0-810 last Sunday with score of 88.
I want to share few detail on my preparation as below:
there is no specific book for 810 exam , so I just used the cop exam book to view related topics
you tube has tons of videos about stream and other good java 8 stuff
Enthuware is a must of course , it has only 3 set of tests though because of less topics involved in upgrade exam.
Mikalai Zaikins summary of the objectives and test were also helpful
I was fully loaded before exam and hoping for 95 as minimum , I guess tricked by few topics
Overall , its been a great experience learning the power of java 8 . I cant wait to apply it in action !!