SAA-C03 Exam Dumps - AWS Certified Solutions Architect - Associate (SAA-C03)

AWS Transit Gateway simplifies network connectivity by acting as a hub that can connect VPCs and on-premises networks through VPN or Direct Connect. It provides scalability and reduces administrative overhead by eliminating the need to manage complex peering relationships as the number of accounts and VPCs grows.

CloudWatch can emit alarm state-change events directly to EventBridge, and AWS documents that alarm state changes are delivered to EventBridge. AWS also documents that Systems Manager Run Command can remotely run commands on managed EC2 instances. Combining those two services removes the need for a custom Lambda function and makes the automation lighter operationally than the Lambda-based alternatives. SNS or chat notifications still require humans to reboot the instance and therefore do not meet the automation requirement. Because the goal is the least operational overhead, using the CloudWatch alarm state change as the trigger and EventBridge to invoke Systems Manager Run Command is the cleanest AWS-native pattern.

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To grant the ECS application the least privilege, you create an IAM policy that explicitly lists the ARNs of the specific S3 buckets the task should access. You then attach this policy to the task role (not the instance role), ensuring only that task has the necessary permissions. This approach avoids granting permissions to other EC2 instances or services and restricts access strictly to the required buckets.

AWS Documentation Extract:

" Attach an IAM policy granting access to specific resources to the ECS task role, not to the instance role, to ensure that only the container has access according to the principle of least privilege. "

" Use explicit ARNs to control access only to specified S3 buckets. "

(Source: Amazon ECS documentation, IAM Roles for Tasks)

A: Tag-based access control for S3 buckets is possible but less direct and commonly used for identity-based access.

C: Attaching the policy to the instance role could grant unintended permissions to all containers or services running on the instance.

D: Wildcard ARNs grant broader access than necessary.

To securely access AWS services like S3 and Secrets Manager from a private VPC without using public IPs, interface VPC endpoints are required. These endpoints are accessible via private IP addresses. For the application to reach these endpoints, appropriate routes must be configured in the route table.

The production workload is steady and long-running, so a commitment-based discount is appropriate there. Compute Savings Plans are a flexible way to reduce cost for consistent production compute usage. The nonproduction environments run only during weekday business hours and can be shut down when not in use, so using On-Demand Instances and turning them off outside working hours is more cost-effective than reserving or dedicating capacity for them. Dedicated Hosts would be unnecessarily expensive, and reserving nonproduction capacity would waste money on idle time. Therefore, combining Compute Savings Plans for production with shut-down On-Demand nonproduction environments is the most cost-efficient design.

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