#Aws
118 posts
AWS Certified Developer - Associate (DVA-C02) #6 Domain 1-5 Development with AWS Services — SDK Development Patterns
The fifth post of the DVA-C02 development domain. It covers the common patterns that recur when calling services with the AWS SDK: pagination, exponential backoff and jitter for handling throttling and transient errors, idempotency implementation, S3 multipart upload and presigned URLs, and the SDK credential provider chain along with region and retry configuration, all at the exam level.
ALB / NLB and ACM (HTTPS)
The role differences among AWS's managed load balancers ALB / NLB / GWLB, the flow of Listener / Target Group / Health Check, and the operational flow of issuing a certificate with ACM and adding HTTPS in one go.
API Gateway + Lambda
The standard pattern for exposing Lambda over HTTP. We cover the difference between REST API and HTTP API, Lambda integration (proxy / non-proxy), routes / methods, authorization (IAM / Cognito / Lambda authorizer), CORS, stages / deployment, throttling, usage plans, caching, custom domains, and cost.
Appendix A — CLF-C02 Certification Bridge
A domain-by-domain mapping table of where this book's 27 chapters of practical content overlap with — and where they leave gaps against — the AWS Cloud Practitioner (CLF-C02) exam scope. It's a bridge for those who want to connect practical learning to the certification track, while a full exam-domain-based treatment is the territory of a separate certification book.
AWS book now available free in full — AWS: From Basics to Production Operations
From your first IAM policy to running a fullstack app on ECS Fargate, this 33-chapter, six-part AWS practical book is free to read in full on the site.
AWS Certified Developer - Associate (DVA-C02) #5 Domain 1-4 Development with AWS Services — Messaging and Events
The fourth post of the DVA-C02 development domain. It covers the difference between SQS standard queues and FIFO queues, visibility timeout and long polling, DLQs, SNS pub/sub and fan-out (SNS + SQS), EventBridge's event bus and rule-based routing and schedules, and Step Functions' state machines (Standard vs Express), all at the exam level. Knowing when to choose which messaging service is the core.
AWS Certified Solutions Architect - Associate (SAA-C03) #16 Full-Scale Multiple-Choice Practice Exam — 50 Questions + Explanations
The final post of the SAA-C03 series. Matched to the real exam's domain weights (security 30% , resilience 26% , high performance 24% , cost 20%), you solve 50 questions and find your weak domains through each question's answer and explanation. Solve them on the clock, then go back to the relevant domain post to shore up any gaps.
AWS CLI and SDK Setup
Installing aws cli v2 and aws configure, profiles and credentials files, the purpose of SDKs like boto3 / aws-sdk-js, and the order the credential chain flows in — the setup for working with AWS outside the console.
CI/CD — GitHub Actions + ECR + ECS
Access-key-free GitHub Actions with OIDC, ECR push, automatic Task Definition updates, ECS Service rolling deployment, deployment circuit breaker and auto-rollback, all the way to CodeDeploy blue/green. A deployment flow that finishes in a single git push.
CloudShell and IAM Identity Center (SSO)
The in-browser terminal CloudShell, plus the IAM Identity Center (SSO) setup that has become the standard for multi-account login, and the aws cli sso login flow.
CloudWatch Intro — Logs / Metrics
The structure of CloudWatch Logs / Metrics / Alarms / Dashboards, log groups and retention, Metric Filters, and the basics of Logs Insights queries — the observability tool that becomes the eye of all operations.
Cost Management — Billing Alerts, Cost Explorer, Free Tier
The limits of the free tier, setting up AWS Budgets and billing alerts, how to slice the invoice with Cost Explorer, and the tag strategy that's the prerequisite for cost analysis. The guardrails that prevent first-invoice shock.