Architecting on AWS Certification Equipment Maintenance & Calibration 3

Question 1

An architect wants to calibrate Auto Scaling to maintain exactly 60% average CPU utilization across a fleet. Which scaling policy type is most appropriate?

Accepted Answer

Target tracking scaling policy

Answer

Target tracking scaling policies automatically adjust capacity to keep a chosen CloudWatch metric at a specified target value, such as 60% average CPU.

Question 2

A company needs to ensure RDS Multi-AZ failover completes within 60 seconds during maintenance events. Which action most directly reduces failover time?

Accepted Answer

Enable RDS Proxy to absorb connection storms

Answer

RDS Proxy maintains a warm connection pool and absorbs the reconnection spike during failover, making the failover effectively transparent to applications.

Question 3

During scheduled maintenance, a DynamoDB table's provisioned throughput must be temporarily increased and then returned to baseline. What is the most operationally efficient way to automate this?

Accepted Answer

Lambda function triggered by EventBridge Scheduler

Answer

An EventBridge Scheduler rule can trigger a Lambda function on a cron schedule to update DynamoDB provisioned capacity before and after the maintenance window.

Question 4

An operations team must track software inventory — installed packages, OS version, and running services — across 1,000 EC2 instances. Which AWS service collects this data without requiring custom scripts?

Accepted Answer

AWS Systems Manager Inventory

Answer

SSM Inventory collects metadata about installed applications, network configurations, and running services from managed instances and stores results in S3 or Systems Manager.

Question 5

A solutions architect must ensure that EC2 instances in an Auto Scaling group are replaced with the latest approved AMI on a weekly cadence. Which approach achieves this with the least operational overhead?

Accepted Answer

Use EC2 Image Builder pipeline with a launch template update and instance refresh

Answer

EC2 Image Builder builds and distributes the new AMI; updating the launch template and triggering an Auto Scaling instance refresh replaces instances in a controlled, rolling manner.

Architecting on AWS Certification Practice Test

Architecting on AWS Certification Practice Test

Architecting on AWS Certification Equipment Maintenance & Calibration 3