Stack Operations
- Templates define infrastructure; stacks are deployed instances of those templates.
- Change sets preview resource changes before execution.
- Rollback returns a stack toward the previous known-good state when creation or update fails.
- Stack policies protect critical stack resources from unintended updates.
Scale and Governance
- StackSets deploy stacks across accounts and Regions.
- Nested stacks reuse common infrastructure patterns.
- Drift detection identifies resources changed outside CloudFormation.
- Deletion policies can retain resources such as databases or buckets when a stack is deleted.
Exam Cues
- Need preview before update: change set.
- Need deploy to many accounts/Regions: StackSets.
- Need know what changed outside IaC: drift detection.
- Need protect a database during stack deletion: deletion policy Retain.
Practice CloudFormation Questions
Put your knowledge to the test with practice questions.