Amazon Web Services SAA-C03 Exam With Confidence Using Practice Dumps

The correct answers are A and D . The requirement is to replace third-party middleware with an AWS-native solution that supports asynchronous communication , exactly-once delivery , and the least infrastructure management . Amazon SQS FIFO queues are the best messaging component because FIFO queues are designed for workloads that require ordered processing and exactly-once message delivery semantics. That makes option D the correct messaging choice.

For the compute layer, AWS Lambda provides the least infrastructure management because it is a fully managed serverless compute service. Lambda removes the need to manage virtual machines, operating systems, or cluster infrastructure. It integrates naturally with queue-based asynchronous architectures and can be invoked to process messages from SQS while scaling automatically based on queue depth and workload demand. That makes option A the best choice for minimizing operational burden.

Option B is incorrect because EC2 instances would require the company to manage instance provisioning, patching, scaling, and availability. Option C is incorrect because Amazon SNS is a pub/sub messaging service and does not provide exactly-once delivery guarantees like SQS FIFO . Option E is incorrect because Amazon EKS introduces Kubernetes management overhead and is not the lowest-management compute option.

AWS best practices recommend using managed messaging and serverless compute to reduce undifferentiated operational work. For a migration that requires asynchronous processing with exactly-once delivery and minimal infrastructure management, the most appropriate architecture is AWS Lambda functions with Amazon SQS FIFO queues .

Option Censures dynamic scaling based on demand using a target tracking scaling policy, optimizing costs.

Option Aresults in over-provisioning, leading to higher costs.

Option Bincreases costs by using larger instances.

Option Dis not feasible as instance store volumes are ephemeral and unsuitable for shared storage like EFS.

A. ElastiCache:Provides in-memory caching, not suitable for persistent, scalable databases.

B. DynamoDB Streams + Lambda:Manages replication manually, increasing latency and operational complexity.

C. Aurora Global Database:Provides high availability but does not support active-active configuration.

D. DynamoDB Global Tables:Provides active-active configuration and sub-second RPO.