I took the Microsoft Exam 70-778 and it was an interesting experience. Can’t say it was easy, but if you have been working with Power BI and study for a couple of weeks, big chance you’ll pass it. 57 tasks, 120 minutes. The questions range from simple Desktop tasks (basic DAX, setting hierarchies, modelling, relationships) to less frequently used Service tasks (App Workspaces, RLS, Allerts, administering user access, etc). If you are are preparing for 70-778 and live in or near Vienna (Austria) check EXCELLAB 70-778 preparation workshop.