Easy — SOA-C03 Practice Quiz

Question 1

A company runs a web application behind an Application Load Balancer (ALB) in a single Availability Zone. All EC2 instances in the Auto Scaling group are also in that one AZ. During a recent AZ impairment, the entire application became unreachable for several hours. The CloudOps team must redesign the architecture to survive the loss of a single Availability Zone with minimal manual intervention. Which change BEST achieves this goal?

Accepted Answer

Enable the ALB in subnets across at least two Availability Zones and configure the Auto Scaling group to launch instances into those multiple AZs.

Answer

Create a second ALB in another Region and use Route 53 failover routing to redirect traffic when the primary AZ fails.

Answer

Increase the desired capacity of the Auto Scaling group in the existing single AZ so more instances are available during an impairment.

Answer

Enable ALB access logging and configure a CloudWatch alarm to notify the team so they can manually launch instances in another AZ.

Question 2

A CloudOps engineer manages a fleet of Lambda functions that write verbose logs to Amazon CloudWatch Logs. The finance team reports that CloudWatch Logs storage costs have grown significantly over the past year. Investigation shows that most log groups were created with the default retention setting and contain years of data, but the compliance team only requires 90 days of retention for these operational logs. What is the MOST cost-effective action to reduce ongoing storage costs while meeting the compliance requirement?

Accepted Answer

Set a 90-day retention policy on the affected log groups so CloudWatch Logs automatically deletes log events older than 90 days.

Answer

Create an EventBridge scheduled rule that triggers a Lambda function every day to delete individual log streams older than 90 days.

Answer

Export all log groups to Amazon S3 with a lifecycle policy and delete the CloudWatch log groups entirely.

Answer

Enable a metric filter on each log group to count old log events and alarm when data exceeds 90 days.