CloudTrail log file validation. If a security auditor asks if the logs have been tampered with, you point to the digest files in the S3 bucket. Also, remember that VPC Flow Logs go to CloudWatch Logs or S3, not CloudTrail. The "Secret" Sauce: Don't Just Practice, Lab Most candidates fail because they read documentation but never break a pipeline.
StackSets deployment options. When you deploy to 10 accounts, do you use Service-Managed permissions (using AWS Organizations) or Self-Managed (using IAM roles)? Service-managed is almost always the answer for enterprise setups. Domain 3: Resilient Cloud Solutions (18%) DevOps isn't just about speed; it's about uptime. This domain asks: How do you deploy without downtime, and how do you recover when it breaks? AWS Certified DevOps Engineer - Professional
The difference between CodeDeployDefault.AllAtOnce , CodeDeployDefault.HalfAtATime , and Canary10Percent5Minutes . Know when to use rolling vs. blue/green for stateful applications (spoiler: you usually add a pre-traffic hook to drain connections). Domain 2: Configuration Management and Infrastructure as Code (20%) You aren't just writing CloudFormation here. You are writing CloudFormation modules , StackSets , and CDK apps that deploy to 50 accounts. CloudTrail log file validation