Amazon Web Services Updated SAA-C03 Exam Questions and Answers by trent

The correct security-group design is to allow inbound database access from the EC2 instances’ security group rather than from individual IP addresses. AWS security groups can reference another security group as the source, which is the scalable and recommended approach for application-to-database communication in dynamic environments such as Auto Scaling groups. That way, newly launched instances automatically inherit access without requiring IP-based rule updates. Option A is brittle because private IPs change as instances scale. Option C is not how security-group rules are defined, and option D reverses the traffic direction. Therefore, allowing the database security group to accept traffic from the web-servers security group is the right architecture.

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

AWS Certificate Manager (ACM) issues and automatically renews public TLS certificates used by Amazon CloudFront. With DNS validation, ACM creates CNAME records that prove domain control; once validated, renewals occur automatically without manual approval, providing the lowest operational effort. For CloudFront, ACM certificates must be in the US East (N. Virginia) Region. CloudFront security policies (A) configure protocol/cipher requirements, not certificate issuance. OAC (B) secures origin access and is unrelated to certificate management. Email validation (D) requires mailbox approvals and operational handling at issuance/renewal, which is less efficient than DNS validation. Thus, ACM with DNS validation delivers automated creation and renewal with minimal overhead.

EC2 Account Attributes: Amazon EC2 allows you to set account attributes to automatically encrypt new EBS volumes. This ensures that all new volumes created in your account are encrypted by default.

Configuration Steps:

Go to the EC2 Dashboard.

Select " Account Attributes " and then " EBS encryption " .

Enable default EBS encryption and select the default AWS KMS key or a customer-managed key.

Prevention of Unencrypted Volumes: By setting this account attribute, you ensure that it is not possible to create unencrypted EBS volumes, thereby enforcing compliance with security requirements.

Operational Efficiency: This solution requires minimal configuration changes and provides automatic enforcement of encryption policies, reducing operational overhead.

AWS S3 Multi-Region Access Points enable customers to use a single global endpoint for S3 bucket access across multiple AWS Regions, providing automatic routing to the nearest Region. This reduces public network congestion by directing user data to the closest S3 bucket and supports high availability with active-active configuration.

Cross-Region Replication ensures data is replicated between buckets in different Regions, meeting the failover and resilience requirements with minimal management overhead.

Option D aligns best with AWS’s recommended approach to resilient, low-latency, and simplified multi-Region S3 access.

Option A lacks the global endpoint and automatic failover. Option B incorrectly describes Multi-Region Access Points configuration and suggests global endpoints per Region, which is contradictory. Option C’s cross-account replication adds complexity and does not provide a single global endpoint.