AWS Certified Specialty SCS-C03 Exam Questions and Answers PDF

Amazon GuardDuty findings provide high-level detection of suspicious activity but are not designed for deep investigation on their own. The AWS Certified Security – Specialty documentation explains that Amazon Detective is purpose-built to support rapid investigations by automatically collecting, correlating, and visualizing data from GuardDuty, AWS CloudTrail, and VPC Flow Logs. Detective enables security engineers to analyze API calls, user behavior, and resource interactions in context without making any changes to the environment.

Using read-only credentials ensures that the investigation does not impact the production application. Amazon Detective allows investigators to pivot directly from a GuardDuty finding into a detailed activity graph, showing which IAM user made anomalous calls, what resources were accessed, and how behavior deviated from the baseline. This significantly accelerates incident investigation.

Options A and C involve applying DenyAll policies, which are containment actions and could affect application availability. Option D requires manual analysis and setup and is slower than using Amazon Detective, which is designed for immediate investigative workflows.

AWS incident response guidance recommends using Detective for rapid, non-intrusive analysis after GuardDuty findings.

Referenced AWS Specialty Documents:

AWS Certified Security – Specialty Official Study Guide

Amazon GuardDuty and Amazon Detective Integration

AWS Incident Response Investigation Best Practices

Comprehensive and Detailed 100to 150 words of Explanation From AWS Certified Security – Specialty topics:

GuardDuty automatically publishes findings to Amazon EventBridge, and EventBridge can route those events to targets such as Amazon SNS for near real-time notification. Because the organization already uses a delegated GuardDuty administrator account, the organization-level findings are managed from that delegated administrator account, so the EventBridge rule should be created there. The rule can match GuardDuty finding events and filter high-severity findings, then send them to an SNS topic subscribed by the SecOps team. Creating the rule in the management account is not aligned with the delegated administration model. AWS Config does not manage GuardDuty finding alerting, and CloudTrail ListFindings API events are not the source of real-time GuardDuty security findings.

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Comprehensive and Detailed 100to 150 words of Explanation From AWS Certified Security – Specialty topics:

To keep application traffic off the public internet, EC2 and Lambda resources must reach S3 through private VPC networking. An S3 gateway endpoint provides private access from the VPC to S3 without using an internet gateway or NAT gateway. An S3 access point can also be restricted to VPC origin so S3 rejects requests that do not originate from the configured VPC path. The Lambda function must run inside the VPC so its S3 traffic can use the private endpoint path. Lambda “block public access” is not the relevant S3 network control. Security groups cannot target S3 gateway endpoints or S3 access points as destination resources in the way the distractors describe.

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In IAM Identity Center, a permission set that includes acustomer managed policydoes not “carry” that policy into each target account automatically unless the policy exists there. When you attach a customer managed policy by name to a permission set, IAM Identity Center expects that policy to be present in each account where the permission set is provisioned. If the policy is missing in any account (common when assigning across multiple accounts), provisioning/assignment can fail because Identity Center cannot attach a non-existent policy to the role it creates in that account.

The correct fix is tocreate the customer managed policy in every target account, ensuring it has thesame nameand the intended permissions in each account. Once the policy exists consistently across accounts, IAM Identity Center can successfully provision the permission set in each account and complete the user assignment.

Options B and D are workarounds that increase complexity and do not address the underlying requirement to use the customer managed policy across accounts. Option C is not the issue here; policy “conflicts” typically do not prevent provisioning—missing referenced customer managed policies do. Therefore, ensuring the customer managed policy exists in each assigned account resolves the failure with the intended multi-account design.