Every EC2 layer we covered in Week 2 — Nitro, instance families, AMIs, Security Groups, Key Pairs, User Data, EBS, Instance Store, ALB, NLB, ASG — is a poor fit for rote memorization. The exam always frames things as scenarios, and those scenarios ask questions like "The SG is wide open, so why doesn't it work?", "Why doesn't the new instance show up in the ALB?", or "Why did our cross-AZ traffic bill explode?" You can't answer these by looking at each layer in isolation; you have to see how the layers mesh and operate together.
Today we tie every Week 2 concept into one production-grade architecture, then work through the traps and exam scenarios you hit most often on top of it