Don't underestimate CLF-C02
I just finished my exam and failed but wanted to do a PSA for the people coming here before their exams. I definitely did not underestimate the exam because of people saying it was easy, however, I just wanted to tell people preparing for it that it is not as easy as everyone posting here says it is.
There are a lot of AWS services and architectural things that you are introduced to, and as someone with no background in AWS it can be a overwhelming. I have no doubt that if you have been working with AWS for a bit, or if you have a knack for remembering information well that you could pass fairly easy and fast. I did go through Stephane Mareek's course and I was a tad bit lax because I figured a fundamental exam would be somewhat easy.
I feel extremely confident going into it for a second try because I know what questions tripped me up, but as someone who failed just now, do not relax on your studying simply because someone here is telling you it is easy or because it is the lowest tier of exam.
(I know some people take the test after a night of cram, I am not referring to that subset because I don't believe you can retain knowledge well that way.)