I use AWS every day and got 17/20. Thanks to a couple of lucky guesses.
But, I believe that at least two of the questions have incorrect/incomplete answers:
One of the questions that requires a typed answer (instead of multiple choice) shows an icon that is used for both EC2 & Appstream. However, only EC2 is considered correct.
In the Route53 icon question - there are multiple versions of the Route53 icon used in different places (do a google image search and you'll see a dozen variant). The icon in the top left ("Pole with two offset rectangles") is used in the console - but this is considered an incorrect answer. The icon in the top right ("Pole with two slightly less offset rectangles") is sometimes used elsewhere and is the only answer considered correct.
But, I believe that at least two of the questions have incorrect/incomplete answers:
One of the questions that requires a typed answer (instead of multiple choice) shows an icon that is used for both EC2 & Appstream. However, only EC2 is considered correct.
In the Route53 icon question - there are multiple versions of the Route53 icon used in different places (do a google image search and you'll see a dozen variant). The icon in the top left ("Pole with two offset rectangles") is used in the console - but this is considered an incorrect answer. The icon in the top right ("Pole with two slightly less offset rectangles") is sometimes used elsewhere and is the only answer considered correct.