In general, I would not expect questions around expect people to remember details about a logo just from a name to work very well. People in general can't do that even with extremely famous logos: https://www.signs.com/branded-in-memory/ Nor can they generally even draw a bike, with physical necessity available to guide them: http://www.gianlucagimini.it/prototypes/velocipedia.html
However, it is absolutely a reasonable request of a logo that you be able to go from logo to designated product, and while quizzing about details like "which horizontal pole is higher" is definitely a bit of an ask, you should still see a lot of people getting that right from just "feeling" which seems right.
I agree with both parts of this. My biggest frustration is that even after I looked at the answers, I couldn't explain many of the logos.
There's a clear attempt to create logical connections: 'directory' manages to evoke a bunch of cards in a file, EMR is a solid reduce block above a bunch of map blocks, and so on. The MediaFoo family is actually quite good - I swapped Package and Store, but otherwise got them all right despite never using the service. The family color scheming is genuinely very good, despite the weird outliers like grey.
But then there's all the rest. Kinesis and Cloudwatch are each a bar graph with a base, but Kinesis is rotated, and has 2 layers of floating base instead of 1 joined layer, so that totally clears things up. (And Athena is 1 layer floating base, with bars going both directions, to help confuse the existing two.)
ELBs and ECS are both multiple full-size layers on the left with a 4-rectangle split layer on the right, but ELB is 3 filled layers and a flat split layer. ECS is hollow layers and a 'long' split layer. Memorable!
Database Migration Service is a mix of Direct Connect and RDS theming, which actually makes sense, but also Elasticache is a disjoint version of Direct Connect in database coloring?
(I had a hell of a time looking these up to check, because about half the guides on Google Images are simply wrong about some services. Check out Elastic IP, which is listed with the icons of 3 other services!)
However, it is absolutely a reasonable request of a logo that you be able to go from logo to designated product, and while quizzing about details like "which horizontal pole is higher" is definitely a bit of an ask, you should still see a lot of people getting that right from just "feeling" which seems right.