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

AWS Budgets allows you to set custom cost and usage budgets. When actual or forecasted usage exceeds the threshold, AWS Budgets can automatically send alerts to an Amazon SNS topic. You can use AWS Cost Explorer in parallel for visual tracking of spending. This solution requires no code and has minimal operational overhead.

EC2 instances in private subnets cannot access the internet unless there is a NAT gateway or a NAT instance configured.

“To enable instances in a private subnet to connect to the internet or other AWS services, you can use a NAT gateway or NAT instance.”

— NAT Gateways – Amazon VPC

In this use case:

EC2 instances are in private subnets

They need to call external APIs (internet access)

The most operationally efficient and secure method is to place a NAT Gateway in a public subnet and update the route table for private subnets to route internet-bound traffic through it.

Incorrect Options:

A: Private subnets don’t support public IPs.

C: VPC peering doesn’t help reach the public internet.

D: Interface endpoints are for private connectivity to AWS services, not external APIs.

The correct answers are A, B, and C because the company needs to handle a sharp increase in read traffic , maintain high availability , and avoid application changes . These three options improve scaling at different layers of the architecture while remaining aligned with the current application design.

A. Amazon CloudFront helps reduce load on the web tier by caching content closer to users at edge locations. This improves responsiveness and reduces the number of requests that must reach the origin web servers during the marketing event. It is a common way to scale web traffic without changing the application.

B. Auto Scaling for the application layer is also appropriate because the application layer is already described as stateless and supports automatic scaling. Adding or removing EC2 instances based on demand helps the application remain responsive under high load.

C. Amazon Aurora with Aurora Replicas and Aurora Auto Scaling is the best way to scale the relational database layer for read-heavy workloads. Aurora Replicas can offload read traffic from the writer instance, and Aurora Auto Scaling can automatically adjust replica capacity based on demand. This preserves the relational architecture while improving read scalability and availability.

Option D can reduce database read pressure, but adding ElastiCache effectively requires the application to use the cache, which conflicts with the requirement to avoid modifying the application. Option E is incorrect because replacing the ALB with an NLB does not solve the application’s scaling or read-traffic bottlenecks. Option F is incorrect because migrating from a relational database to DynamoDB would require a major redesign.

So the best combination is CloudFront , Auto Scaling for the stateless application tier , and Aurora with read scaling features .