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Amazon SCS-C03 Exam Overview:

Certification Vendor:	Amazon AWS
Exam Name:	AWS Certified Security - Specialty
Exam Number:	SCS-C03
Available Languages:	Traditional Chinese, Japanese, Korean, English, Simplified Chinese
Exam Format:	Matching, Multiple choice, Ordering, Multiple response
Exam Duration:	170 minutes
Exam Price:	300 USD
Passing Score:	750 (scaled score 100–1000)
Real Exam Qty:	65 (50 scored, 15 unscored)
Related Certifications:	AWS Certified SysOps Administrator - Associate AWS Certified Solutions Architect - Associate AWS Certified Security - Specialty (SCS-C02)
Certificate Validity Period:	3 years
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	Incident Response: This domain addresses responding to security incidents through automated and manual strategies, containment, forensic analysis, and recovery procedures to minimize impact and restore operations.
Topic 2	Data Protection: This domain centers on protecting data at rest and in transit through encryption, key management, data classification, secure storage, and backup mechanisms.
Topic 3	Infrastructure Security: This domain focuses on securing AWS infrastructure including networks, compute resources, and edge services through secure architectures, protection mechanisms, and hardened configurations.

Amazon AWS Certified Security - Specialty Sample Questions (Q64-Q69):

NEW QUESTION # 64
A company has contracted with a third party to audit several AWS accounts. To enable the audit, cross-account IAM roles have been created in each account targeted for audit. The auditor is having trouble accessing some of the accounts.
Which of the following may be causing this problem? (Choose three.)

A. The secret key used by the auditor is missing or incorrect.
B. The Amazon EC2 role used by the auditor must be set to the destination account role.
C. The auditor has not been grantedsts:AssumeRolefor the role in the destination account.
D. The role ARN used by the auditor is missing or incorrect.
E. The auditor is using the incorrect password.
F. The external ID used by the auditor is missing or incorrect.

Answer: C,D,F

Explanation:
Cross-account access for an external auditor typically usesSTS AssumeRoleinto a role that exists in each target account. Three common failure points are: (1) therole ARNbeing wrong or missing, (2) the auditor lacking permission to callsts:AssumeRoleon that role, and (3) anexternal IDmismatch when the role trust policy requires it. Theexternal IDis a best practice for third-party access to mitigate the confused-deputy problem; if the trust policy includes an sts:ExternalId condition, the auditor must supply the exact expected value. If it's absent or incorrect, AssumeRole will be denied.
The auditor must also be authorized on their side (IAM user/role policy) to call sts:AssumeRole (permission), and the destination role'strust policymust trust the auditor principal. If either side is misconfigured, the assume operation fails. Finally, the auditor must reference the correctrole ARNfor each account; using an incorrect ARN (wrong account ID/role name/path) is a frequent reason only "some accounts" fail.

NEW QUESTION # 65
A startup company is using a single AWS account that has resources in a single AWS Region. A security engineer configures an AWS CloudTrail trail in the same Region to deliver log files to an Amazon S3 bucket by using the AWS CLI. Because of expansion, the company adds resources in multiple Regions. The security engineer notices that the logs from the new Regions are not reaching the S3 bucket.
What should the security engineer do to fix this issue with the LEAST amount of operational overhead?

A. Change the existing CloudTrail trail so that it applies to all Regions.
B. Create a new CloudTrail trail that applies to all Regions.
C. Change the S3 bucket to receive notifications to track all actions from all Regions.
D. Create a new CloudTrail trail. Select the new Regions where the company added resources.

Answer: A

Explanation:
CloudTrail trails can be configured as eithersingle-Regionormulti-Region. A single-Region trail delivers events only for the Region in which it is created; when the company begins using additional Regions, those events will not be logged to the existing S3 destination unless the trail is updated. The least operational overhead is tomodify the existing trailand enablemulti- Regionlogging (that is, configure the trail to "apply to all Regions"). This preserves the current S3 bucket destination, encryption settings, log file validation configuration, IAM roles, and any integrations that already depend on the existing trail name and S3 prefix structure.

NEW QUESTION # 66
A company's platform has grown rapidly over the past 6 months. The company's platform architecture evolved quickly to accommodate the growth. The company's development team has been deploying features quickly by using different AWS services. The development team has not performed formal architecture reviews.
The company needs to evaluate its security posture against AWS security best practices.
Which solution will meet these requirements?

A. Enable AWS Security Hub CSPM. Create a Security Hub CSPM automation rule to map existing services to approved architecture patterns. Use the data to identify non-compliance against AWS best practices and generate a compliance report.
B. Enable Amazon Detective. Create a Detective investigation for AWS security best practices. Use a behavior graph to visualize the data. Analyze the entities to identify architectural components that do not follow AWS security best practices.
C. Create a new workload in the AWS Well-Architected Tool. Work with the development team to answer security questions based on the team's current state. Use the save milestone feature to track improvements against identified high-risk items.
D. Use the cost recommendations in AWS Cost Explorer. Analyze the cost implications of security misconfigurations. Prioritize architectural changes based on potential cost savings as a result of implementing AWS security best practices.

Answer: C

Explanation:
Comprehensive and Detailed 100to 150 words of Explanation From AWS Certified Security - Specialty topics:
The AWS Well-Architected Tool is designed to evaluate workloads against AWS best practices, including the Security Pillar. Creating a workload and answering the security questions based on the current architecture gives the company a structured review of identity, detection, infrastructure protection, data protection, and incident response practices. Milestones record the state of the workload at a point in time and help track improvement as high-risk issues are remediated. Cost Explorer is for cost analysis, not security posture review. Security Hub CSPM provides control findings but does not replace a full Well-Architected workload review. Amazon Detective supports investigation of security findings, not architecture best-practice assessment.

NEW QUESTION # 67
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 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.
B. 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.
C. 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.
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: A

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 # 68
A company has two AWS accounts: Account A and Account B. Each account has a VPC. An application that runs in the VPC in Account A needs to write to an Amazon S3 bucket in Account B. The application in Account A already has permission to write to the S3 bucket in Account B. The application and the S3 bucket are in the same AWS Region. The company cannot send network traffic over the public internet.
Which solution will meet these requirements?

A. Create a VPC peering connection between the VPC in Account A and the VPC in Account B. Update the VPC route tables, network ACLs, and security groups to allow network traffic between the peered IP ranges.
B. In Account A, create a gateway VPC endpoint for Amazon S3. Update the VPC route table in Account A.
C. In both accounts, create a transit gateway and VPC attachments in a subnet in each Availability Zone.
Update the VPC route tables.
D. Deploy a software VPN appliance in Account A. Create a VPN connection between the software VPN appliance and a virtual private gateway in Account B.

Answer: B

Explanation:
To keep S3 accessoff the public internet, the standard AWS approach is to use anAmazon S3 gateway VPC endpoint(AWS PrivateLink for S3 is not used; S3 uses gateway endpoints). A gateway endpoint adds routes in the VPC route tables so traffic destined for S3 stays on the AWS backbone network rather than traversing an internet gateway, NAT gateway, or public IP paths. This satisfies the "cannot send traffic over the public internet" requirement while allowing the application in Account A to reach S3 in the same Region.
Cross-account bucket access is controlled byIAM and the S3 bucket policy, not by networking between the two accounts' VPCs. The bucket resides in S3 (a regional service), not inside Account B's VPC, so connecting VPC-to-VPC (peering, transit gateway, VPN) does not inherently provide private access to S3.
Those options would add complexity and still typically require internet/NAT unless S3 endpoints are used.
With the gateway endpoint in Account A, the application can privately reach S3, and because permissions are already granted to write to the bucket in Account B, the write operations will succeed without public internet routing.

NEW QUESTION # 69
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