Just sharing a quick note, I passed the exam ai-102 on June 10th, 2021. The exam doesn’t cover predictive analytics in SQL like I had hoped, but this exam covers a ton of Cognitive Service scenarios and materials. Primarily on Computer Vision, Conversational AI (translator/speech) and Cognitive Search. It covers the whole gamut of the Cognitive APIs.
So even if you don’t want to take the test in the near future, I highly recommend at least doing the Free-Online Learning Paths on docs online. It may take a total of 3-4 days if you crunch through it.
If you need any help, I’d be happy to go through it with you or help with the material.