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

Amazon ElastiCache (Redis OSS) provides an in-memory cache that drastically improves read performance with minimal operational overhead.

It integrates easily with RDS and does not require schema or database changes.

EC2-based caching (Option C) increases management overhead.

DAX (Option D) accelerates DynamoDB only, not RDS.

Moving to DynamoDB (Option A) requires complete application and schema redesign.

=====================================================

To securely publish messages to an encrypted Amazon SNS topic, the following steps are required:

A. Resource policy for SNS topic:Ensures that the Lambda function is explicitly allowed to publish messages to the topic.

C. Resource policy for KMS key:Provides the necessary permissions to use the customer-managed key for encryption.

F. Lambda execution role:Grants the Lambda function the necessary IAM permissions to use the encryption key.

Other options:

Bis invalid because using SSE-KMS does not eliminate the need for resource policies.

Doverlaps with A, but specifying the ARN in the topic policy is covered by creating the resource policy.

Eis unrelated as API Gateway is not required for this setup.

AWS Documentation Reference:

Amazon SNS and KMS Permissions

The correct answer isDbecause the workload isinterruptible, runs for onlyup to 48 hours each week, and the company wants themost cost-effectivesolution while alsominimizing interruptions. These requirements strongly align withAmazon EC2 Spot Instances. Spot Instances provide significant savings compared with On-Demand pricing and are ideal for batch processing, analytics, and other fault-tolerant workloads that can recover from interruptions.

To minimize the chance of interruption, the best allocation strategy iscapacity-optimized. This strategy places Spot requests into the most available Spot capacity pools, which reduces the likelihood that the running instances will be reclaimed. That is more aligned with the requirement than focusing primarily on the absolute lowest price. By usinginstance type overridesin the Auto Scaling group, the company can specify multiple acceptable instance types across generations and sizes. This improves access to capacity and helps the company adoptnewer generation instancesover time without locking into a single family or type.

Option A is incorrect becauseConvertible Reserved Instancesare not as cost-effective as Spot for an interruptible workload that runs only part of the week, and a 3-year term reduces flexibility. Option B is incorrect becauseStandard Reserved Instancesare better for steady-state workloads and do not support the requirement to move to the latest generation each year as flexibly. Option C is close, butprice-capacity-optimizedbalances cost and capacity; the question prioritizes minimizing interruptions, socapacity-optimizedis the better answer.

AWS cost optimization guidance recommendsSpot Instances with a capacity-focused strategyfor fault-tolerant workloads that need low cost and fewer interruptions.

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.

S3 Object Lock in Compliance Mode prevents objects from being deleted or overwritten for a fixed, specified retention period. Compliance Mode is specifically designed to meet regulatory requirements, ensuring that no user, including the root user, can modify or delete the object during the retention period.

Reference Extract:

" S3 Object Lock in compliance mode protects objects from being deleted or overwritten during the specified retention period, helping meet regulatory retention requirements. "

Source: AWS Certified Solutions Architect – Official Study Guide, S3 Object Lock and Compliance section.