AWS CloudFormation Certification Guide

Primary Certification

AWS DevOps Engineer Professional (DOP-C02)

Format: 75 questions | 180 minutes | 750/1000 | $300 USD (needs verification — exam format/pricing changes over time, check the current AWS Certification page before relying on these numbers)

Related Certifications

•AWS SysOps Administrator Associate

•AWS Solutions Architect Associate

Key Exam Topics

•Template sections: Parameters, Mappings, Conditions, Resources (required), Outputs

•Intrinsic functions: !Ref, !GetAtt, !Sub, !Join, !If, !Select, !FindInMap, !ImportValue

•Stack operations: create/update/delete, drift detection, stack policies

•ChangeSets: preview changes before apply; safe production deployments

•Nested stacks: break large templates; cross-stack references via Outputs + ImportValue

•StackSets: deploy stacks to multiple accounts/regions from single template

•Custom resources: Lambda-backed for non-native AWS resources or external APIs

Must-Know CLI Commands

bash

aws cloudformation create-stack --stack-name my-stack --template-body file://template.yaml --parameters ParameterKey=Env,ParameterValue=prod
aws cloudformation create-change-set --stack-name my-stack --change-set-name my-change --template-body file://template.yaml
aws cloudformation execute-change-set --stack-name my-stack --change-set-name my-change
aws cloudformation detect-stack-drift --stack-name my-stack
aws cloudformation describe-stack-drift-detection-status --stack-drift-detection-id xxx

Exam Tips

•DeletionPolicy: Retain (keep resource) | Snapshot (EBS/RDS) | Delete (default)

•UpdateReplacePolicy: same options but for stack updates (replaces resource)

•cfn-init and cfn-signal: bootstrap EC2 instances; signal success/failure to stack

•Stack rollback on failure: CloudFormation auto-rolls back on deployment failure

Study Plan

Week 1-2: Read official docs + overview/fundamentals sections in this platform

Week 3-4: Hands-on labs (AWS free tier / Azure sandbox / GCP free tier)

Week 5: Practice exams (TutorialsDojo, ExamTopics, Whizlabs)

Final days: Review weak areas + cheatsheet

Free Study Resources

•AWS: aws.amazon.com/training — free digital courses

•Azure: learn.microsoft.com — Microsoft Learn (free + sandbox labs)

•GCP: cloud.google.com/training — free courses + Qwiklabs credits

•TutorialsDojo: cheat sheets for all exams (best value paid resource)

Revision Notes

PRIMARY EXAM: AWS DevOps Engineer Professional (DOP-C02)

TOP TOPICS:
  Template sections: Parameters, Mappings, Conditions, Resources (required), Outputs
  Intrinsic functions: !Ref, !GetAtt, !Sub, !Join, !If, !Select, !FindInMap, !ImportValue
  Stack operations: create/update/delete, drift detection, stack policies
  ChangeSets: preview changes before apply; safe production deployments

CloudFormation — Certification