Get All AWS Certified Security - Specialty Exam Questions with Validated Answers
| Vendor: | Amazon |
|---|---|
| Exam Code: | SCS-C03 |
| Exam Name: | AWS Certified Security - Specialty |
| Exam Questions: | 179 |
| Last Updated: | March 15, 2026 |
| Related Certifications: | Amazon Specialty |
| Exam Tags: |
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A company is planning to migrate its applications to AWS in a single AWS Region. The company's applications will use a combination of Amazon EC2 instances, Elastic Load Balancing (ELB) load balancers, and Amazon S3 buckets. The company wants to complete the migration as quickly as possible. All the applications must meet the following requirements:
* Data must be encrypted at rest.
* Data must be encrypted in transit.
* Endpoints must be monitored for anomalous network traffic.
Which combination of steps should a security engineer take to meet these requirements with the LEAST effort? (Select THREE.)
Amazon GuardDuty provides continuous monitoring for anomalous and malicious network activity by analyzing VPC Flow Logs, DNS logs, and CloudTrail events. Enabling GuardDuty across accounts requires minimal configuration and immediately satisfies the requirement to monitor endpoints for anomalous network traffic, as described in the AWS Certified Security -- Specialty Study Guide.
Encrypting data in transit for applications behind Elastic Load Balancing is most efficiently achieved by using AWS Certificate Manager (ACM). ACM provisions and manages TLS certificates automatically, and integrating ACM with ELB enables encrypted communication without manual certificate management.
For encryption at rest in Amazon S3, AWS best practices recommend enforcing server-side encryption using AWS KMS. An S3 bucket policy that denies PutObject requests unless the x-amz-server-side-encryption condition is present ensures that all uploaded objects are encrypted at rest using KMS-managed keys. This provides strong encryption guarantees with minimal operational effort.
Option A is unnecessary because Amazon Inspector focuses on vulnerability assessment, not encryption or network anomaly detection. Option C adds network complexity and is not required to meet the stated requirements. Option E is incorrect because x-amz-meta-side-encryption is not a valid enforcement mechanism.
Referenced AWS Specialty Documents:
AWS Certified Security -- Specialty Official Study Guide
Amazon GuardDuty Threat Detection
AWS Certificate Manager and ELB Integration
Amazon S3 Encryption Best Practices
A company runs its microservices architecture in Kubernetes containers on AWS by using Amazon Elastic Kubernetes Service (Amazon EKS) and Amazon Auror
a. The company has an organization in AWS Organizations to manage hundreds of AWS accounts that host different microservices.
The company needs to implement a monitoring solution for logs from all AWS resources across all accounts. The solution must include automatic detection of security-related issues.
Which solution will meet these requirements with the LEAST operational effort?
Amazon GuardDuty is a fully managed, organization-aware threat detection service that continuously analyzes AWS logs such as CloudTrail events, VPC Flow Logs, DNS logs, EKS audit logs, and RDS activity. According to the AWS Certified Security -- Specialty Official Study Guide, GuardDuty is designed to operate at scale across AWS Organizations with minimal operational overhead.
By designating a GuardDuty administrator account in the organization's management account and enabling GuardDuty organization-wide, the company can automatically enable threat detection across hundreds of AWS accounts. Enabling EKS Protection allows GuardDuty to analyze Kubernetes audit logs for suspicious activity, while RDS Protection provides anomaly detection for Amazon Aurora databases.
Options B, C, and D require custom log aggregation, processing, and analytics pipelines, which significantly increase operational effort and maintenance complexity. Amazon Inspector does not analyze logs, Athena-based analysis is manual, and Kinesis plus Lambda requires custom detection logic.
AWS documentation explicitly identifies GuardDuty with AWS Organizations integration as the recommended solution for centralized, automated threat detection across multi-account environments with minimal operational effort.
AWS Certified Security -- Specialty Official Study Guide
Amazon GuardDuty User Guide
GuardDuty Organization Administration Documentation
A company runs a web application on a fleet of Amazon EC2 instances that are in an Auto Scaling group. The EC2 instances are in the same VPC subnet as other workloads.
A security engineer deploys an Amazon GuardDuty detector in the same AWS Region as the EC2 instances and integrates GuardDuty with AWS Security Hub.
The security engineer needs to implement an automated solution to detect and appropriately respond to anomalous traffic patterns for the web application. The solution must comply with AWS best practices for initial response to security incidents and must minimize disruption to the web application.
Which solution will meet these requirements?
AWS incident response best practices emphasize rapid containment with minimal blast radius. According to the AWS Certified Security -- Specialty Official Study Guide, isolating a compromised resource while allowing the application to continue running is the preferred initial response.
By using Amazon EventBridge to detect GuardDuty findings related to anomalous traffic and invoking a Lambda function, the security engineer can automatically remove the affected EC2 instance from the Auto Scaling group and attach a restricted security group. This immediately isolates the instance while allowing Auto Scaling to launch a replacement instance, ensuring application availability.
Option A is invalid because EC2 instance profiles do not use long-term access keys. Option C affects the entire subnet and could disrupt unrelated workloads. Option D provides notification only and does not meet the requirement for automated response.
AWS documentation explicitly recommends instance-level isolation using security groups as a best practice for initial incident containment.
AWS Certified Security -- Specialty Official Study Guide
Amazon GuardDuty User Guide
AWS Incident Response Best Practices
A security engineer wants to forward custom application-security logs from an Amazon EC2 instance to Amazon CloudWatch. The security engineer installs the CloudWatch agent on the EC2 instance and adds the path of the logs to the CloudWatch configuration file.
However, CloudWatch does not receive the logs. The security engineer verifies that the awslogs service is running on the EC2 instance.
What should the security engineer do next to resolve the issue?
The Amazon CloudWatch agent requires explicit IAM permissions to create log groups, create log streams, and put log events into Amazon CloudWatch Logs. According to the AWS Certified Security -- Specialty Study Guide, the most common cause of CloudWatch agent log delivery failures is missing or insufficient IAM permissions on the EC2 instance role.
The CloudWatchAgentServerPolicy AWS managed policy provides the required permissions, including logs:CreateLogGroup, logs:CreateLogStream, and logs:PutLogEvents. Attaching this policy to the EC2 instance role enables the CloudWatch agent to successfully deliver custom application logs without requiring changes to the application or logging configuration.
Options A, B, and C are incorrect because CloudTrail, Amazon S3, and Amazon Inspector are not designed to ingest custom application logs from EC2 instances in this manner. AWS documentation clearly states that IAM permissions must be granted to the EC2 role for CloudWatch Logs ingestion.
This approach aligns with AWS best practices for least privilege while ensuring reliable detection and monitoring capabilities.
Referenced AWS Specialty Documents:
AWS Certified Security -- Specialty Official Study Guide
Amazon CloudWatch Logs Agent Configuration
AWS IAM Best Practices for Monitoring
A company is attempting to conduct forensic analysis on an Amazon EC2 instance, but the company is unable to connect to the instance by using AWS Systems Manager Session Manager. The company has installed AWS Systems Manager Agent (SSM Agent) on the EC2 instance.
The EC2 instance is in a subnet in a VPC that does not have an internet gateway attached. The company has associated a security group with the EC2 instance. The security group does not have inbound or outbound rules. The subnet's network ACL allows all inbound and outbound traffic.
Which combination of actions will allow the company to conduct forensic analysis on the EC2 instance without compromising forensic data? (Select THREE.)
AWS Systems Manager Session Manager requires secure outbound HTTPS connectivity from the EC2 instance to Systems Manager endpoints. In a VPC without internet access, AWS Certified Security -- Specialty documentation recommends using interface VPC endpoints to enable private connectivity without exposing the instance to the internet.
Creating a VPC interface endpoint for Systems Manager allows the SSM Agent to communicate securely with the Systems Manager service. The endpoint must have an attached security group that allows inbound traffic on port 443 from the VPC CIDR range. Additionally, the EC2 instance security group must allow outbound HTTPS traffic on port 443 so the agent can initiate connections.
Option C is incorrect because creating or associating key pairs enables SSH access, which can alter forensic evidence and violates forensic best practices. Option B is unnecessary because Session Manager does not require inbound rules on the EC2 instance. Option F is invalid because EC2 does not use interface endpoints for management connectivity.
This combination ensures secure, private access for forensic investigation while preserving evidence integrity and adhering to AWS incident response best practices.
Referenced AWS Specialty Documents:
AWS Certified Security -- Specialty Official Study Guide
AWS Systems Manager Session Manager Architecture
AWS Incident Response and Forensics Best Practices
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