AWS Certification practice exam is paid for. I'll probably take it day after tomorrow, when I can get myself some really high-quality quiet time. I'm incredibly anxious, even though it's relatively cheap and is just a practice exam… I know the AWS stuff that I use and have been using for the past 3-4 years, but it's the stuff that I don't use that worries me -- DynamoDB, SWS, etc. I've studied and read through most of the docs, but we'll see what happens.