I just completed the exam for AWS Certified Cloud Practitioner, a certificate that shows I have basic knowledge about the different Amazon Web Service offerings.
The exam was relatively easy. I've been preparing for this conference for a while, and done quite a bit of studying on the various AWS products. I did study a few trial exams from Udemy.com, and those were helpful for questions on more basic stuff like the Billing and Support models -- the less technical topics.
Still, it's been a while since I had done an official test and I was a little nervous, and now I'm very happy I passed the test. "Certified individuals" also get access to a special area here at the re:Invent 2018 conference.