Compared to the physics classes or that algorithm class, I put my brain on auto-pilot. Sure, the final was hard but mostly because I didn't have time to write code in a word document, and people who went to the official exam area actually got significantly more time (I took it a few years before you).

Many things were missing from that class, including how to improve performance by ensuring that warp receives the optimal data size, for example by using float4.

I could have learned the same stuff by looking at his MOOC - which is what OP got bored of doing.