Case studies

Real infrastructure, studied on its own terms. Company cases describe only publicly documented architecture and cite every source; pattern studies teach the designs the exam expects you to reach for.

CI/CD for a containerized app: CodePipeline, CodeBuild, and ECSHow one git push becomes a new container running behind your load balancer, and how the pipeline puts the old one back when the new one misbehaves.3.3 3.4Event-driven order processing with SNS, SQS, and LambdaOne order in, many jobs out: how SNS fanout, SQS buffers, and Lambda consumers turn a checkout into a loosely coupled pipeline that survives failures and never double-charges.1.1 1.2Real-time stream processing with Kinesis Data Streams and LambdaA durable ordered buffer on one side, a poller that hands your function batches on the other, and a poison-pill trap in between.1.1 1.2The serverless REST API: API Gateway in front, Lambda in the middle, DynamoDB behindThree managed services, no servers to patch, and a request path that scales from zero to spike without you touching a load balancer.1.1 1.2