Quiz 2026 SCS-C03: The Best AWS Certified Security - Specialty Practice Test Pdf

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Amazon SCS-C03 Exam Overview:

Certification Vendor:	Amazon AWS
Exam Name:	AWS Certified Security - Specialty
Exam Number:	SCS-C03
Certificate Validity Period:	3 years
Real Exam Qty:	65 (50 scored, 15 unscored)
Available Languages:	Traditional Chinese, Simplified Chinese, English, Japanese, Korean
Passing Score:	750 (scaled score 100–1000)
Related Certifications:	AWS Certified Solutions Architect - Associate AWS Certified SysOps Administrator - Associate AWS Certified Security - Specialty (SCS-C02)
Exam Format:	Multiple response, Multiple choice, Ordering, Matching
Exam Duration:	170 minutes
Exam Price:	300 USD
Recommended Training:	AWS Security Specialty Official Training
Exam Registration:	AWS Certification Registration
Sample Questions:	Amazon SCS-C03 Sample Questions
Exam Way:	Online proctored or onsite testing center
Pre Condition:	Recommended: 3–5 years of experience securing cloud solutions; prior knowledge of AWS services and security best practices; AWS Certified Solutions Architect - Associate or AWS Certified SysOps Administrator - Associate is highly recommended
Official Syllabus URL:	https://docs.aws.amazon.com/aws-certification/latest/security-specialty-03/security-specialty-03.html

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Amazon SCS-C03 Exam Syllabus Topics:

Topic	Details
Topic 1	Identity and Access Management: This domain deals with controlling authentication and authorization through user identity management, role-based access, federation, and implementing least privilege principles.
Topic 2	Infrastructure Security: This domain focuses on securing AWS infrastructure including networks, compute resources, and edge services through secure architectures, protection mechanisms, and hardened configurations.
Topic 3	Detection: This domain covers identifying and monitoring security events, threats, and vulnerabilities in AWS through logging, monitoring, and alerting mechanisms to detect anomalies and unauthorized access.
Topic 4	Data Protection: This domain centers on protecting data at rest and in transit through encryption, key management, data classification, secure storage, and backup mechanisms.

Amazon AWS Certified Security - Specialty Sample Questions (Q253-Q258):

NEW QUESTION # 253
A company is running a containerized application on an Amazon Elastic Container Service (Amazon ECS) cluster that uses AWS Fargate. The application runs as several ECS services. The ECS services are in individual target groups for an internet-facing Application Load Balancer (ALB). The ALB is the origin for an Amazon CloudFront distribution. An AWS WAF web ACL is associated with the CloudFront distribution.
Web clients access the ECS services through the CloudFront distribution. The company learns that the web clients can bypass the web ACL and can access the ALB directly.
Which solution will prevent the web clients from directly accessing the ALB?

A. Create an AWS PrivateLink endpoint. Specify the existing ALB as the target. Update the CloudFront distribution by setting the PrivateLink endpoint as the origin.
B. Create a new internal ALB. Move all the ECS services to the internal ALB. Delete the internet-facing ALB. Update the CloudFront distribution by setting the internal ALB as the origin.
C. Update the CloudFront distribution by adding an X-Shared-Secret custom header for the origin. Modify the listener rules for the existing ALB to forward only the requests in which the X-Shared-Secret header has the correct value.
D. Modify the listener rules for the existing ALB. Add a condition to forward only the requests that come from IP addresses in the CloudFront origin prefix list.

Answer: C

Explanation:
The correct solution is option D because it effectively prevents direct access to the internet-facing ALB while allowing legitimate traffic that originates from Amazon CloudFront. By configuring CloudFront to include a custom HTTP header (such as X-Shared-Secret) in all origin requests, and then configuring ALB listener rules to only forward requests that contain the expected header value, the ALB will reject any requests that bypass CloudFront.
This approach is a documented AWS best practice when CloudFront is placed in front of an ALB and AWS WAF is associated with the CloudFront distribution. AWS WAF only evaluates traffic that flows through CloudFront; therefore, preventing direct access to the ALB is critical to ensure that all requests are inspected by the web ACL.
Option A is invalid because CloudFront does not support AWS PrivateLink endpoints as origins. Option B is incorrect because CloudFront cannot use an internal ALB as an origin; CloudFront requires a publicly reachable origin. Option C is not recommended because CloudFront IP ranges change frequently, making IP- based allow lists operationally complex and error-prone, and AWS does not provide a supported CloudFront prefix list for ALB listener rules.
AWS Security Specialty guidance explicitly recommends using custom origin headers to restrict ALB access to CloudFront-only traffic, making option D the correct and secure solution.

NEW QUESTION # 254
A company uses infrastructure as code (IaC) to create AWS infrastructure. The company writes the code as AWS CloudFormation templates to deploy the infrastructure. The company has an existing CI/CD pipeline that the company can use to deploy these templates.
After a recent security audit, the company decides to adopt a policy-as-code approach to improve the company's security posture on AWS. The company must prevent the deployment of any infrastructure that would violate a security policy, such as an unencrypted Amazon EBS volume.
Which solution will meet these requirements?

A. Create rule sets in AWS CloudFormation Guard. Run validation checks for CloudFormation templates as a phase of the CI/CD process.
B. Turn on AWS Trusted Advisor. Configure security notifications as webhooks in the preferences section of the CI/CD pipeline.
C. Create rule sets as SCPs. Integrate the SCPs as a part of validation control in a phase of the CI/CD process.
D. Turn on AWS Config. Use the prebuilt rules or customized rules. Subscribe the CI/CD pipeline to an Amazon SNS topic that receives notifications from AWS Config.

Answer: A

Explanation:
Comprehensive and Detailed 100to 150 words of Explanation From AWS Certified Security - Specialty topics:
AWS CloudFormation Guard is the correct policy-as-code control for validating CloudFormation templates before deployment. Guard lets security teams write rules that check JSON or YAML templates for policy requirements, such as requiring encrypted EBS volumes. AWS CloudFormation best practices specifically recommend integrating cfn-guard into CI/CD pipelines to validate templates before deployment and prevent noncompliant resources from reaching the environment. AWS Config is mainly detective or proactive compliance evaluation after or during resource provisioning, but the question asks to prevent deployment inside an IaC pipeline. Trusted Advisor does not validate templates. SCPs restrict account-level permissions but are not a CloudFormation template validation engine.

NEW QUESTION # 255
A company's data scientists use Amazon SageMaker with datasets stored in Amazon S3. Data older than 45 days must be removed according to policy.
Which action should enforce this policy?

A. Configure S3 Intelligent-Tiering.
B. Create a scheduled Lambda function to delete old objects monthly.
C. Configure an S3 Lifecycle rule to delete objects after 45 days.
D. Create a Lambda function triggered on object upload to delete old data.

Answer: C

NEW QUESTION # 256
A development team is creating an open source toolset to manage a company's software as a service (SaaS) application. The company stores the code in a public repository so that anyone can view and download the toolset's code. The company discovers that the code contains an IAM access key and secret key that provide access to internal resources in the company ' s AWS environment. A security engineer must implement a solution to identify whether unauthorized usage of the exposed credentials has occurred. The solution also must prevent any additional usage of the exposed credentials.
Which combination of steps will meet these requirements? (Select TWO.)

A. Generate an IAM credential report. Check the report to determine when the user that owns the access key last logged in.
B. Create a new IAM access key and secret key for the user whose credentials were exposed.
C. Deactivate the exposed IAM access key from the user ' s IAM account.
D. Create a rule in Amazon GuardDuty to block the access key in the source code from being used.
E. Use AWS Identity and Access Management Access Analyzer to determine which resources the exposed credentials accessed and who used them.

Answer: A,C

Explanation:
The immediate containment step for exposed access keys is todisable (deactivate) the compromised IAM access key(Option B). This prevents any further use of the leaked credentials, which is essential once secrets are publicly exposed. Creating a new key (Option D) may be part of recovery later, but it does not stop abuse of the already exposed key unless the exposed key is first deactivated.
To determine whether the credentials were used, you need evidence of access activity. Among the provided options, the best fit is generating and reviewing theIAM credential report(Option E). The report includes metadata such as access key status and "last used" style details that help triage whether the user's credentials have been exercised recently. While deeper investigation would typically rely on CloudTrail "AccessKeyId" searches, the credential report is a quick AWS-native step aligned to the answer choices.
Option A is not correct: IAM Access Analyzer helps identify external access paths to resources and validate policies; it does not provide a definitive history of what a specific access key did. Option C is not a GuardDuty capability-GuardDuty generates findings; it does not "block" a specific access key. Therefore, deactivating the key and using credential reporting to assess recent usage best matches the requirements.

NEW QUESTION # 257
A company operates a web application that runs on Amazon EC2 instances. The application listens on port 80 and port 443. The company uses an Application Load Balancer (ALB) with AWS WAF to terminate SSL and to forward traffic to the application instances only on port 80.
The ALB is in public subnets that are associated with a network ACL named NACL1. The application instances are in dedicated private subnets that are associated with a network ACL named NACL2. An Amazon RDS for PostgreSQL DB instance that uses port 5432 is in a dedicated private subnet that is associated with a network ACL named NACL3. All the network ACLs currently allow all inbound and outbound traffic.
Which set of network ACL changes will increase the security of the application while ensuring functionality?

A. Make the following changes to NACL3:
* Add a rule that allows inbound traffic on port 5432 from NACL2.
* Add a rule that allows outbound traffic on ports 1024-65536 to NACL2.
* Remove the default rules that allow all inbound and outbound traffic.
B. Make the following changes to NACL3:
* Add a rule that allows inbound traffic on port 5432 from the CIDR blocks of the application instance subnets.
* Add a rule that allows outbound traffic on ports 1024-65536 to the application instance subnets.
* Remove the default rules that allow all inbound and outbound traffic.
C. Make the following changes to NACL2:
* Add a rule that allows inbound traffic on port 5432 from the CIDR blocks of the RDS subnets.
* Add a rule that allows outbound traffic on port 5432 to the RDS subnets.
D. Make the following changes to NACL2:
* Add a rule that allows outbound traffic on port 5432 to the CIDR blocks of the RDS subnets.
* Remove the default rules that allow all inbound and outbound traffic.

Answer: B

Explanation:
Comprehensive and Detailed 100to 150 words of Explanation From AWS Certified Security - Specialty topics:
Network ACLs are stateless subnet-level controls, so both request traffic and return traffic must be explicitly allowed. The PostgreSQL database subnet should allow inbound TCP 5432 only from the application subnet CIDR blocks, not from the internet or unrelated subnets. Because return traffic from the database uses ephemeral destination ports on the client side, the outbound rule from the database subnet must allow TCP
1024-65536 back to the application instance subnets. Option A is invalid because network ACL rules use CIDR blocks, not other NACL names as sources or destinations. Options C and D modify only the application subnet NACL and fail to correctly restrict and allow database subnet return traffic.

NEW QUESTION # 258
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