AWS DevOps Cost Optimization 5

Question 1

A team uses AWS CloudTrail to audit all API calls made by their CI/CD pipeline. CloudTrail data event logging is generating significant S3 costs. What is the best cost reduction strategy?

Accepted Answer

Filter CloudTrail data events to log only S3 and Lambda events for specific pipeline-related buckets and functions

Answer

CloudTrail data events are charged per 100,000 events; scoping data event logging to specific resources rather than all S3 buckets or Lambda functions dramatically reduces event volume and cost.

Question 2

Which AWS pricing model provides the greatest long-term savings for a stable CodeBuild project that runs builds continuously 8 hours per day, 5 days per week?

Accepted Answer

CodeBuild Reserved Capacity for the estimated monthly build minutes

Answer

CodeBuild Reserved Capacity lets teams purchase committed build minutes at a discount of up to 30% compared to On-Demand pricing, saving money on predictable, recurring build workloads.

Question 3

A team wants to minimize costs for running ephemeral Kubernetes clusters used in integration testing via their pipeline. Which approach is most cost-effective?

Accepted Answer

Spin up EKS clusters with Fargate Spot nodes on-demand for each test run and tear them down after completion

Answer

Ephemeral EKS clusters with Fargate Spot nodes that are created and destroyed per test run eliminate idle costs and benefit from Spot pricing discounts for interruptible workloads.

Question 4

A pipeline generates thousands of SNS notifications daily for deployment events. Many subscribers rarely act on these notifications. Which architecture change reduces costs?

Accepted Answer

Use SNS message filtering so each subscriber only receives relevant event types

Answer

SNS message filtering applies subscription filter policies so subscribers only receive messages matching their criteria, reducing the number of messages delivered and the downstream processing costs.

Question 5

Which AWS Budgets configuration provides the best cost control for a CI/CD pipeline with variable but bounded spend?

Accepted Answer

Create a Cost Budget with automated actions that restrict IAM permissions or stop EC2 instances when spend exceeds the threshold

Answer

AWS Budgets automated actions can automatically apply restrictive IAM policies or stop EC2 instances when budget thresholds are breached, enforcing hard spending limits without manual intervention.

AWS Practice Test

AWS Practice Test

AWS DevOps Cost Optimization 5