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

ElastiCache for Redis OSS supportsMulti-AZ with automatic failover, which is exactly the feature required here. AWS documentation states that when Multi-AZ is enabled and the primary node fails, ElastiCache automatically promotes a read replica to primary, minimizing downtime and restoring write capability without requiring manual promotion steps. Backups are useful for recovery, but they do not provide automatic operational failover. A design that depends on manual promotion is also weaker than native automatic failover. Since the question explicitly asks for a solution that canautomatically fail over, the correct answer is to enableMulti-AZfor the replication group.

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The optimal solution for scalable and resilient hybrid networking is to use AWS Direct Connect with a Direct Connect gateway for secure, low-latency access to AWS, and an AWS Transit Gateway to manage connectivity among hundreds of VPCs.

By associating the Transit Gateway with the Direct Connect gateway, you enable transitive routing between on-premises and all VPCs, while minimizing network complexity and maintaining high performance.

VPC peering does not scale well, and VPNs don’t offer the same performance or consistency.

AWS Secrets Manager is the managed service for securely storing, rotating, and retrieving database credentials. When you store Aurora credentials in Secrets Manager and enable automatic rotation, Secrets Manager updates the credentials in both the database and the stored secret.

Each Lambda function version or alias can call Secrets Manager at runtime to retrieve the current secret value, so even older deployed Lambda versions that use an alias will always obtain the most recent credentials without redeployment.

Why others are not suitable:

B: Embeds credentials in code, requiring redeployment on every rotation and violating security best practices.

C: Environment variables are version-specific; old aliases would continue using outdated values unless you redeploy or change them.

D: Parameter Store can store and rotate secrets but is less integrated for database credential rotation than Secrets Manager; Secrets Manager is the purpose-built minimal-overhead choice here.