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

The requirements are UDP support, ultra-low latency, and the ability to handle millions of requests per second in a cost-effective manner. Network Load Balancer (NLB) is the AWS service designed for high-performance Layer 4 load balancing, including TCP, TLS, and UDP. NLB can scale to very high throughput and connection rates while maintaining low latency, which is critical for real-time gaming traffic.

Option C is correct because NLB supports UDP listeners and forwards traffic directly to EC2 targets with minimal processing overhead. This yields lower latency than Layer 7 solutions and is well suited for game protocols that are latency-sensitive and often use UDP for fast, lightweight communication. NLB also provides static IP addresses per Availability Zone and integrates cleanly with Auto Scaling groups.

Option A is incorrect because an Application Load Balancer operates at Layer 7 (HTTP/HTTPS) and does not handle raw UDP traffic; it’s optimized for web applications, not gaming protocols. Option B is incorrect because Gateway Load Balancer is intended to deploy and scale third-party virtual appliances (such as firewalls) and uses Geneve encapsulation; it is not meant for distributing general internet game traffic to EC2 game servers. Option D adds significant cost and complexity by deploying multi-Region fleets. It may help global latency in some scenarios, but the question asks for the most cost-effective way to handle massive UDP traffic volume; multi-Region duplication is typically not the first choice for that requirement alone.

Therefore, C (NLB with UDP) best meets the scale and latency requirements with the most efficient, purpose-built AWS load balancing service.

The most efficient way for management-style reporting is AWS Cost Explorer, because it is designed for interactive cost analysis, filtering, grouping, and exporting reports without building a data pipeline. If the organization has activated cost allocation capabilities (for example, by tagging resources or using other allocation methods), Cost Explorer can present costs in a way that supports chargeback/showback and budgeting. From an operational standpoint, generating and downloading a report from Cost Explorer is quick, requires minimal setup, and is repeatable for periodic budget planning.

Option A (Athena) is powerful but typically requires setting up the Cost and Usage Report (CUR) delivery to Amazon S3, defining schemas, and writing/maintaining SQL queries. That is more operational overhead than needed when the ask is “most efficient way to obtain this report information.” Option C (billing dashboard bill download) provides invoice-style line items, but it is not optimized for slicing/grouping “by user” and may not align with departmental budgeting workflows. Option D is unrelated: AWS Budgets alerts on thresholds and forecasts; it does not generate a billed-items-by-user report.

Important nuance: “by user” reporting in AWS is usually achieved through cost allocation tags, account structure, or other allocation dimensions rather than literal per-person IAM identity billing. In practice, departments/teams/users are mapped via tagging and chargeback structures, which Cost Explorer is intended to analyze and export. As a result, Cost Explorer is the most operationally efficient tool to produce a downloadable report for budget planning.

Therefore, B best meets the requirement with the least effort and fastest path to a usable report.

Amazon Aurora Serverless is a fully managed, MySQL-compatible database that automatically scales based on demand and provides high availability. Combining this with EC2 Auto Scaling and an Application Load Balancer achieves both application and database high availability and scalability.

Reference Extract:

" Aurora Serverless automatically starts up, shuts down, and scales capacity based on your application ' s needs, providing a cost-effective, highly available database solution. "

Source: AWS Certified Solutions Architect – Official Study Guide, Aurora Serverless and Scaling section.

Amazon RDS for Oracle is a managed database service, which significantly reduces operational overhead compared to running Oracle on EC2 or on-premises. AWS Secrets Manager natively integrates with RDS and supports automatic, scheduled password rotation with minimal setup. You can configure the rotation schedule (including yearly), and Secrets Manager will handle the secure password storage and rotation workflow for you.

AWS Documentation Extract:

" AWS Secrets Manager helps you protect access to your applications, services, and IT resources without the upfront investment and on-going maintenance costs of operating your own infrastructure. You can configure automatic rotation for supported databases such as Amazon RDS for Oracle. "

(Source: AWS Secrets Manager documentation)

A, C, D: These solutions require custom scripting, Lambda, and alarms, leading to more operational overhead.

Interface VPC endpointsare the AWS-native way for workloads in private subnets to access supported AWS serviceswithout public IP addressesand without traversing the public internet. AWS documents that traffic through interface endpoints stays on the AWS network backbone and that instances in the VPC do not need public IP addresses to communicate with those service endpoints. NAT gateways still rely on public AWS service endpoints and are not the private-connectivity answer described in the question. Internet gateways are clearly incorrect for private-only access, and Direct Connect is unrelated to private subnet access to AWS managed services inside a VPC. Therefore, interface VPC endpoints are the right answer.

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Aurora Global Database is designed for low-latency cross-Region reads and disaster recovery for relational data.

Amazon S3 Cross-Region Replication (CRR) automatically replicates unstructured data to another Region, ensuring high availability and resilience.

“Aurora Global Database replicates your data with typical latency of less than 1 second to secondary AWS Regions.”

“Amazon S3 Cross-Region Replication automatically replicates every object uploaded to your bucket to a destination bucket in another AWS Region.”

— Aurora Global Database

— S3 Cross-Region Replication

This combination meets the multi-Region, high availability, fault-tolerant requirement for both relational and unstructured data.

AWS Transit Gateway is purpose-built for large-scale, hub-and-spoke network architectures. It simplifies connectivity between multiple VPCs and on-premises environments, which is ideal for managing hundreds of VPCs.

“AWS Transit Gateway enables you to connect your VPCs and on-premises networks through a central hub. This simplifies your network and puts an end to complex peering relationships.”

— Transit Gateway Documentation

Features:

Scales to thousands of VPCs.

Integrates with AWS Direct Connect via Direct Connect Gateway.

Centralized routing control.

Incorrect Options:

A: VPC endpoints are for private access to AWS services—not VPC-to-VPC connectivity.

C: Route 53 is DNS, not a network transport layer.

D: Secrets Manager is for secret storage, not networking.

The correct answers areA and D. The requirement is to replace third-party middleware with an AWS-native solution that supportsasynchronous communication,exactly-once delivery, and theleast infrastructure management.Amazon SQS FIFO queuesare the best messaging component because FIFO queues are designed for workloads that requireordered processingandexactly-once message deliverysemantics. That makes optionDthe correct messaging choice.

For the compute layer,AWS Lambdaprovides 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 optionAthe 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 becauseAmazon SNSis a pub/sub messaging service and does not provide exactly-once delivery guarantees likeSQS FIFO. Option E is incorrect becauseAmazon EKSintroduces 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 isAWS Lambda functionswithAmazon SQS FIFO queues.