Took my second CRM 2015 exam today and managed to clear it.

There were total 49 questions with passing marks of 700 in 90 minute’s time.

It was more focused on CRM 2013 SP1 enhancements for Service side and Sales module. Few features on CRM 2015 were also applied.

I also felt it was lot easier than CRM 2013 Applications exam. Refer to the below helpful post for the training material.

http://www.nzcrmguy.com/microsoft-dynamics-crm-2015-exams-elearning-courseware/

Hope it helps!