Pass the Amazon Web Services AWS Certified Specialty SCS-C03 Questions and answers with Dumpstech

AWS WAF provides managed and custom rules that can immediately mitigate common web exploits such as SQL injection without modifying application code. According to AWS Certified Security – Specialty documentation, placing AWS WAF in front of an Application Load Balancer is a recommended rapid-response control for legacy applications with known vulnerabilities.

Creating an ALB in front of the existing EC2 instances allows seamless traffic migration. AWS WAF SQL injection rules can be deployed and tested without downtime. Updating Route 53 to point to the ALB preserves normal operations. Restricting EC2 security groups afterward prevents bypassing the WAF.

Option B introduces CloudFront changes and single-origin testing, increasing complexity. Option C cannot be completed within 24 hours and risks downtime. Option D is invalid because AWS WAF cannot be attached directly to EC2 instances.

Referenced AWS Specialty Documents:

AWS Certified Security – Specialty Official Study Guide

AWS WAF Web ACL Architecture

AWS Application Load Balancer Security

Amazon S3 pre-signed URLs grant temporary access based on the permissions of the principal that generates them. AWS Certified Security – Specialty documentation explains that fine-grained authorization can be enforced by combining pre-signed URLs with IAM policy conditions.

By tagging each invoice object with a client identifier and adding a condition to the EC2 instance role policy using s3:ResourceTag/ClientId, the role can generate pre-signed URLs only for objects associated with a specific client. This ensures that each client can access only their own invoices, even though the URLs are temporary and unauthenticated.

Option A over-permissions clients. Option C is unnecessary because instance profiles already use temporary credentials. Option D violates AWS best practices by using long-term credentials.

AWS recommends resource tagging with IAM policy conditions for scalable, secure access control.

Referenced AWS Specialty Documents:

AWS Certified Security – Specialty Official Study Guide

Amazon S3 Pre-Signed URLs

IAM Policy Conditions and Resource Tags

Step 1:Obtain the SAML metadata fromIAM Identity Center.

Step 2:Obtain the SAML metadata from theexternal IdP.

Step 3:Configure theexternal IdP as the identity sourceinIAM Identity Center.

When integratingAWS IAM Identity Center (formerly AWS SSO)with anexternal identity provider (IdP)usingSAML 2.0, AWS requires a specific sequence of steps to establish trust and federation correctly.

Step 1: Obtain the SAML metadata from IAM Identity Center

IAM Identity Center acts as theservice provider (SP)in the SAML trust. The external IdP must trust IAM Identity Center, so the IdP needs IAM Identity Center’s SAML metadata first. This metadata contains critical information such as the SP entity ID, ACS (Assertion Consumer Service) URL, and signing certificate. Without this metadata, the external IdP cannot be configured to send assertions to AWS.

Step 2: Obtain the SAML metadata from the external IdP

After the external IdP is configured to trust IAM Identity Center, the IdP generates its own SAML metadata. This metadata includes the IdP entity ID, SSO endpoint, and signing certificate. IAM Identity Center requires this information to validate authentication assertions coming from the external IdP.

Step 3: Configure the external IdP as the identity source in IAM Identity Center

Once both metadata files are available, the security engineer configures the external IdP as theidentity sourcein IAM Identity Center. At this stage, IAM Identity Center imports the IdP metadata and establishes the SAML trust relationship. After this configuration, users authenticated by the external IdP can be federated into AWS accounts and applications via IAM Identity Center.

Why the other options are incorrect:

Creating an IAM role with an IdP API endpoint is used forIAM federation, not IAM Identity Center.

Automatic provisioning (SCIM) is optional and is configuredafterSAML federation is established.

Automatic provisioning must be enabled onboth sides, but it is not required to complete the core IdP integration.

This sequence follows AWS best practices for SAML-based federation with IAM Identity Center.

Network Load Balancers operate at Layer 4 and are optimized for extreme performance, ultra-low latency, and handling sudden traffic spikes. According to AWS Certified Security – Specialty documentation, using a TCP listener on an NLB allows TLS traffic to pass through directly to backend containers without termination, preserving true end-to-end encryption.

This approach eliminates the overhead of decrypting and re-encrypting traffic at the load balancer, reducing latency and maximizing throughput. NLBs scale automatically to handle volatile traffic patterns and millions of requests per second.

Application Load Balancers operate at Layer 7 and introduce additional latency due to TLS termination and HTTP processing. Route 53 multivalue routing does not provide load balancing at the transport layer and does not ensure encryption handling.

AWS recommends NLB TCP pass-through for high-performance, end-to-end encrypted container workloads.

Referenced AWS Specialty Documents:

AWS Certified Security – Specialty Official Study Guide

Elastic Load Balancing Architecture

Network Load Balancer Performance Characteristics

AWS best practices require CloudFormation to assume a dedicated service role. This ensures consistent permissions regardless of the user. Users must have iam:PassRole permission to pass the role. Updating stacks to use the service role enforces uniform deployment behavior.

Referenced AWS Specialty Documents:

AWS Certified Security – Specialty Official Study Guide

AWS CloudFormation Service Roles

AWS IAM Identity Center delegated administration requires foundational configuration to be completed in the organization’s management account before delegation. According to the AWS Certified Security – Specialty documentation, IAM Identity Center must be enabled with a directory in the management account before any delegation can occur.

Permission sets must be created in the management account because they define the permissions that will later be delegated to member accounts. Additionally, user assignments must initially exist in the management account to establish baseline access control before delegation is configured.

Option A is too generic and not a required prerequisite step. Option C is unrelated to Identity Center delegation. Option E is incorrect because IAM Identity Center uses identities from its directory or external IdPs, not IAM users.

AWS guidance clearly outlines directory creation, permission set definition, and initial user assignments as mandatory preparatory steps for delegated administration.

Referenced AWS Specialty Documents:

AWS Certified Security – Specialty Official Study Guide

AWS IAM Identity Center Delegated Administration

AWS Organizations and Identity Center Integration

AWS CloudTrail organization trails are specifically designed to providecentralized, organization-wide loggingwith minimal operational effort. According to the AWS Certified Security – Specialty Official Study Guide, an organization trail recordsall management events for all member accountsand delivers them to asingle Amazon S3 bucket.

To ensure that logscannot be altered or deleted, Amazon S3Object Lock in compliance modemust be used. Compliance mode enforceswrite-once-read-many (WORM)protection, meaningno user, including the root user, can delete or modify objects before the retention period expires. This directly satisfies the requirement that no changes or deletions are allowed for 2 years.

The S3 bucket must reside in thededicated security accountto provide isolation and strong security boundaries. Granting write permissions to theorganization’s management account(Option A) aligns with AWS best practices, because the management account owns and manages the organization trail and centrally delivers logs on behalf of all member accounts.

Option B increases attack surface by allowing all member accounts to write directly. Option C does not meet immutability requirements because lifecycle policies do not prevent deletion. Option E introduces unnecessary services and operational complexity.

AWS documentation explicitly identifies the combination ofCloudTrail organization trails + S3 Object Lock (compliance mode)as therecommended, lowest-overhead solutionfor long-term, immutable audit log retention.

AWS Certified Security – Specialty Official Study Guide

AWS CloudTrail Organization Trail Documentation

Amazon S3 Object Lock Documentation

AWS Well-Architected Framework – Security Pillar

Password policies are enforced at the identity provider where authentication occurs. According to the AWS Certified Security – Specialty Study Guide, when IAM is federated with an external identity provider such as on-premises Active Directory, IAM does not manage or enforce password policies. Instead, password requirements such as minimum length must be enforced directly in Active Directory Group Policy Objects.

Amazon Cognito user pools maintain their own user directory and authentication logic. Cognito provides configurable password policies, including minimum length, complexity, and expiration. To enforce a minimum password length for application users, the Cognito user pool password policy must be updated.

IAM password policies apply only to IAM users that authenticate directly with IAM and do not affect federated users or Cognito users. SCPs and IAM policies cannot enforce password length requirements.

Referenced AWS Specialty Documents:

AWS Certified Security – Specialty Official Study Guide

AWS IAM Federation and Password Policies

Amazon Cognito User Pool Security Settings

Amazon Inspector provides native Lambda code vulnerability scanning. GuardDuty focuses on runtime threats, not static code analysis.

AWS incident response best practices emphasizerapid containment, credential revocation, and threat detectionto minimize the blast radius of a compromise. According to the AWS Certified Security – Specialty Official Study Guide, when unauthorized resources such as an Amazon S3 bucket hosting malware are discovered, immediate action must be taken to stop further misuse of the account and to prevent recurrence.

Rotating or deleting all AWS access keys (Option D)is a critical containment step. If an IAM user has been compromised, any long-term credentials associated with that user must be revoked immediately to prevent continued unauthorized access. AWS guidance explicitly lists access key rotation or deletion as a first-response action for suspected credential compromise.

Deleting unrecognized or unauthorized resources (Option F)directly removes the malicious infrastructure that is being abused. In this case, deleting the unauthorized S3 bucket immediately stops malware distribution and reduces reputational and compliance impact.

Turning on Amazon GuardDuty (Option B)enables continuous threat detection by analyzing CloudTrail events, VPC Flow Logs, and DNS logs. GuardDuty can identify additional malicious activity, compromised credentials, or persistence mechanisms that the attacker may have established. AWS documentation recommends enabling GuardDuty during or immediately after an incident to detect ongoing or future threats.

Option A does not reduce the impact of the current compromise. Option C is overly disruptive and not recommended; credential rotation should be targeted. Option E is unnecessary because there is no indication that EBS-backed compute resources are involved.

AWS incident response guidance clearly prioritizescredential revocation, malicious resource removal, and threat detectionto minimize consequences.

AWS Certified Security – Specialty Official Study Guide

AWS Incident Response Best Practices

Amazon GuardDuty User Guide

AWS IAM Security Best Practices