Exam objectives for the previous Java 8 1Z0-808/809 were fairly detailed but the ones for 1Z0-815/816 are too vague and high level. Are you planning to provide more details on the topics that are covered? This will be very helpful for book authors and mock exam creators for these certification exam.
Enthuware Java Certification Mock Exams
Apologies for the delay in responding. At this time, these are the exam topics as they will be.
Oracle Certification Program