Yesterday (10/19/16) I pass my 3rd Associate level exam (AWS SysOps Administrator) which I believe is the hardest among the three associate exams.
Even though the Linux Academy course is good but I felt that just doing the course wouldn't get you pass the certification. The exam questions were based on use cases (almost 35 plus questions) and were long. The other two exam I had time to review but for this exam I was running out of time. Luckily I read the three white papers(Security, VPC , Storage Services ) in details and several Faqs.
So folks do the labs read the white papers and Faqs .. Make sure you know ELB, Autoscaling, Route 53, VPC and RDS well and good luck ..