AWS DevOps Cost Optimization 3

Question 1

A DevOps team uses AWS CloudFormation for infrastructure deployments and notices high costs from frequent stack updates in lower environments. Which approach best reduces these costs?

Accepted Answer

Use CloudFormation Change Sets to preview and batch changes before applying

Answer

Change Sets allow teams to review and batch multiple infrastructure changes before a single deployment, reducing the number of stack update operations and associated resource churn.

Question 2

Which AWS Cost Explorer feature helps a DevOps team identify which CI/CD pipeline components are driving the highest AWS spend?

Accepted Answer

Cost allocation tags filtered by pipeline name or environment

Answer

Cost allocation tags applied to pipeline-created resources (e.g., 'pipeline:my-app', 'env:staging') allow Cost Explorer to break down spend by pipeline component or environment.

Question 3

A team's CodeDeploy blue/green deployments leave old Auto Scaling Groups running for 1 hour after successful deployment. What change reduces unnecessary costs?

Accepted Answer

Reduce the termination wait time for the original environment in the deployment group

Answer

The original environment termination wait time in a blue/green deployment controls how long old instances stay running; reducing it minimizes the overlap period where both environments incur costs.

Question 4

A DevOps team uses Systems Manager Automation documents to run remediation tasks across hundreds of accounts. Which approach minimizes SSM Automation costs?

Accepted Answer

Consolidate multiple small automation steps into fewer, larger documents

Answer

SSM Automation pricing is per automation step executed; consolidating steps reduces the total step count and therefore total cost.

Question 5

Which action reduces costs when using Amazon EventBridge rules to trigger CodePipeline executions?

Accepted Answer

Add event pattern filters to EventBridge rules to avoid triggering pipelines on irrelevant events

Answer

Precise event patterns filter out irrelevant events before they trigger pipeline executions, reducing unnecessary pipeline runs and their associated build, test, and deploy costs.

AWS Practice Test

AWS Practice Test

AWS DevOps Cost Optimization 3