What exams did you hate studying for?

I've got a particular loathing at the moment for SC-300. I know it's the same for all Microsoft exams, but it really feels like I keep finding getting practice questions where I ask myself why I need to store this information when understanding the core concepts and acknowledging if I need to know what legacy roles can't be managed with PIM I can probably Google if I ever need it.

However, I suppose the main reason I'm hating it so much is that work have decided it's one of the exams I need to progress, even though I won't use most of what's in the exam in my role and there's a very good chance we won't even have our own tenancy in 12 months. And so I struggle to care.

What exams have you hated and had to grit your teeth and get on with?