Quiz 2026 SOA-C03: Professional Reliable AWS Certified CloudOps Engineer - Associate Exam Practice

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Amazon SOA-C03 Exam Syllabus Topics:

Topic	Details
Topic 1	Networking and Content Delivery: This section measures skills of Cloud Network Engineers and focuses on VPC configuration, subnets, routing, network ACLs, and gateways. It includes optimizing network cost and performance, configuring DNS with Route 53, using CloudFront and Global Accelerator for content delivery, and troubleshooting network and hybrid connectivity using logs and monitoring tools.
Topic 2	Security and Compliance: This section measures skills of Security Engineers and includes implementing IAM policies, roles, MFA, and access controls. It focuses on troubleshooting access issues, enforcing compliance, securing data at rest and in transit using AWS KMS and ACM, protecting secrets, and applying findings from Security Hub, GuardDuty, and Inspector.
Topic 3	Deployment, Provisioning, and Automation: This section measures the skills of Cloud Engineers and covers provisioning and maintaining cloud resources using AWS CloudFormation, CDK, and third-party tools. It evaluates automation of deployments, remediation of resource issues, and managing infrastructure using Systems Manager and event-driven processes like Lambda or S3 notifications.
Topic 4	Reliability and Business Continuity: This section measures the skills of System Administrators and focuses on maintaining scalability, elasticity, and fault tolerance. It includes configuring load balancing, auto scaling, Multi-AZ deployments, implementing backup and restore strategies with AWS Backup and versioning, and ensuring disaster recovery to meet RTO and RPO goals.
Topic 5	Monitoring, Logging, Analysis, Remediation, and Performance Optimization: This section of the exam measures skills of CloudOps Engineers and covers implementing AWS monitoring tools such as CloudWatch, CloudTrail, and Prometheus. It evaluates configuring alarms, dashboards, and notifications, analyzing performance metrics, troubleshooting issues using EventBridge and Systems Manager, and applying strategies to optimize compute, storage, and database performance.

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Amazon AWS Certified CloudOps Engineer - Associate Sample Questions (Q149-Q154):

NEW QUESTION # 149
A SysOps administrator needs to encrypt an existing Amazon Elastic File System (Amazon EFS) file system by using an existing AWS KMS customer managed key.
Which solution will meet these requirements?

A. Directly modify the file system to use encryption. Specify the KMS customer managed key.
B. Create a new EFS file system that is encrypted with the KMS customer managed key. Create an Amazon EC2 instance to copy the files. Mount the encrypted file system and unencrypted file system on the instance. Copy all data from the unencrypted file system to the encrypted file system. Unmount the unencrypted file system and remove the temporary instance.
C. Use Amazon EFS replication to create a new file system. Copy the data and metadata from the existing file system to the new file system. Generate a new TLS certificate. Specify the TLS certificate in the replication configuration. When the replication process finishes, fail over to the new encrypted file system.
D. Use Amazon EFS replication to create a new file system. Copy the data and metadata from the existing file system to the new file system. Specify the KMS customer managed key in the replication configuration. When the replication process finishes, fail over to the new encrypted file system.

Answer: D

Explanation:
Amazon EFS encryption at rest is a file system creation attribute; an unencrypted EFS file system cannot be "turned on" for encryption in place. Therefore, meeting the requirement ("encrypt an existing EFS using an existing KMS customer managed key") requires creating a new encrypted file system and migrating data.
Option A is the most operationally efficient because EFS replication is a managed mechanism that continuously copies data and metadata from a source file system to a destination file system.
By specifying the existing KMS customer managed key for the destination, the new file system is encrypted at rest under the required key. After replication has caught up, the administrator can perform a controlled cutover (failover) so applications mount the encrypted destination instead of the original source. This reduces manual copying effort, supports ongoing synchronization during migration, and simplifies the cutover window.

NEW QUESTION # 150
A company plans to run a public web application on Amazon EC2 instances behind an Elastic Load Balancing (ELB) load balancer. The company's security team wants to protect the website by using AWS Certificate Manager (ACM) certificates. The load balancer must automatically redirect any HTTP requests to HTTPS.
Which solution will meet these requirements?

A. Create a Network Load Balancer that has two TCP listeners on port 80 and port 443. Attach an SSL/TLS certificate to listener port 443. Create a rule to redirect requests from port 80 to port 443.
B. Create an Application Load Balancer that has one HTTP listener on port 80 and one HTTPS protocol listener on port 443. Attach an SSL/TLS certificate to listener port 443. Create a rule to redirect requests from port 80 to port 443.
C. Create an Application Load Balancer that has one HTTPS listener on port 80. Attach an SSL/TLS certificate to listener port 80. Create a rule to redirect requests from HTTP to HTTPS.
D. Create an Application Load Balancer that has two TCP listeners on port 80 and port 443. Attach an SSL/TLS certificate to listener port 443. Create a rule to redirect requests from port 80 to port 443.

Answer: B

Explanation:
An Application Load Balancer (ALB) supports both HTTP and HTTPS listeners. By attaching an ACM-managed SSL/TLS certificate to the HTTPS listener on port 443 and configuring a redirect rule in the HTTP (port 80) listener to forward traffic to HTTPS, the ALB automatically redirects all HTTP requests to HTTPS, meeting both the security and operational requirements.

NEW QUESTION # 151
A company runs an application that logs user data to an Amazon CloudWatch Logs log group.
The company discovers that personal information the application has logged is visible in plain text in the CloudWatch logs.
The company needs a solution to redact personal information in the logs by default. Unredacted information must be available only to the company's security team. Which solution will meet these requirements?

A. Create an Amazon CloudWatch data protection policy for the application log group. Configure data identifiers for the types of personal information that the application logs. Ensure that the security team has permission to call the unmask API operation on the application log group.
B. Create an Amazon S3 bucket. Create an export task from appropriate log groups in CloudWatch.
Export the logs to the S3 bucket. Configure an Amazon Macie scan to discover personal data in the S3 bucket. Invoke an AWS Lambda function to move identified personal data to a second S3 bucket.
Update the S3 bucket policies to grant only the security team access to both buckets.
C. Create a customer managed AWS KMS key. Configure the KMS key policy to allow only the security team to perform decrypt operations. Associate the KMS key with the application log group.
D. Create an OpenSearch domain. Create an AWS Glue workflow that runs a Detect PII transform job and streams the output to the OpenSearch domain. Configure the CloudWatch log group to stream the logs to AWS Glue. Modify the OpenSearch domain access policy to allow only the security team to access the domain.

Answer: A

Explanation:
CloudWatch Logs data protection provides native redaction/masking of sensitive data at ingestion and query. AWS documentation states it can "detect and protect sensitive data in logs" using data identifiers, and that authorized users can "use the unmask action to view the original data." Creating a data protection policy on the log group masks PII by default for all viewers, satisfying the requirement to redact personal information. Granting only the security team permission to invoke the unmask API operation ensures that unredacted content is restricted. Option B (KMS) encrypts at rest but does not redact fields; encryption alone does not prevent plaintext visibility to authorized readers. Options A and D add complexity and latency, move data out of CloudWatch, and do not provide default inline redaction/unmask controls in CloudWatch itself. Therefore, the CloudOps-aligned, managed solution is to use CloudWatch Logs data protection with appropriate data identifiers and unmask permissions limited to the security team.

NEW QUESTION # 152
A company deploys AWS infrastructure in a VPC that has an internet gateway. The VPC has public subnets and private subnets. An Amazon RDS for MySQL DB instance is deployed in a private subnet. An AWS Lambda function uses the same private subnet and connects to the DB instance to query data.
A developer modifies the Lambda function to require the function to publish messages to an Amazon Simple Queue Service (Amazon SQS) queue. After these changes, the Lambda function times out when it tries to publish messages to the SQS queue.
Which solutions will resolve this issue? (Select TWO.)

A. Create a gateway endpoint for Amazon SQS in the VPC.
B. Create an interface VPC endpoint for Amazon SQS in the VPC.
C. Deploy a NAT gateway. Update the private subnet's route table to route all traffic to the NAT gateway.
D. Reconfigure the Lambda function so that the function is not connected to the VPC.
E. Deploy an RDS proxy. Configure the Lambda function to connect to the DB instance through the proxy.

Answer: B,C

Explanation:
Comprehensive Explanation (250-350 words):
When an AWS Lambda function is configured to run inside a VPC, it loses default internet access. All outbound traffic must be explicitly routed. In this scenario, the Lambda function resides in a private subnet and successfully connects to Amazon RDS, but it times out when attempting to publish messages to Amazon SQS. This indicates a lack of network connectivity to the SQS service endpoint.
There are two valid AWS-supported ways to restore connectivity. The first is to deploy a NAT gateway in a public subnet and update the private subnet route table to send outbound internet-bound traffic (0.0.0.0/0) to the NAT gateway. This allows the Lambda function to reach public AWS service endpoints, including SQS.
The second option is to create an interface VPC endpoint (AWS PrivateLink) for Amazon SQS. This enables private, secure connectivity to SQS directly within the AWS network without traversing the internet.
This approach is often preferred for security-sensitive workloads and removes dependency on NAT gateways.
Option A would break database connectivity because the Lambda function must remain in the VPC to access the private RDS instance. Option B does not address outbound connectivity to SQS. Option E is incorrect because Amazon SQS does not support gateway endpoints; only interface endpoints are supported.
Therefore, deploying a NAT gateway or creating an SQS interface endpoint resolves the timeout issue.

NEW QUESTION # 153
A multinational company uses an organization in AWS Organizations to manage over 200 member accounts across multiple AWS Regions. The company must ensure that all AWS resources meet specific security requirements.
The company must not deploy any EC2 instances in the ap-southeast-2 Region. The company must completely block root user actions in all member accounts. The company must prevent any user from deleting AWS CloudTrail logs, including administrators. The company requires a centrally managed solution that the company can automatically apply to all existing and future accounts. Which solution will meet these requirements?

A. Enable AWS Security Hub across the organization. Create custom security standards to enforce the security requirements. Use AWS CloudFormation StackSets to deploy the standards to all the accounts in the organization. Set up Security Hub automated remediation actions.
B. Create AWS Config rules with remediation actions in each account to detect policy violations. Implement IAM permissions boundaries for the account root users.
C. Use AWS Control Tower for account governance. Configure Region deny controls. Use Service Control Policies (SCPs) to restrict root user access.
D. Configure AWS Firewall Manager with security policies to meet the security requirements. Use an AWS Config aggregator with organization-wide conformance packs to detect security policy violations.

Answer: C

Explanation:
AWS CloudOps governance best practices emphasize centralized account management and preventive guardrails. AWS Control Tower integrates directly with AWS Organizations and provides "Region deny controls" and "Service Control Policies (SCPs)" that apply automatically to all existing and newly created member accounts. SCPs are organization-wide guardrails that define the maximum permissions for accounts. They can explicitly deny actions such as launching EC2 instances in a specific Region, or block root user access.
To prevent CloudTrail log deletion, SCPs can also include denies on cloudtrail:DeleteTrail and s3:DeleteObject actions targeting the CloudTrail log S3 bucket. These SCPs ensure that no user, including administrators, can violate the compliance requirements.
AWS documentation under the Security and Compliance domain for CloudOps states:
"Use AWS Control Tower to establish a secure, compliant, multi-account environment with preventive guardrails through service control policies and detective controls through AWS Config." This approach meets all stated needs: centralized enforcement, automatic propagation to new accounts, region-based restrictions, and immutable audit logs. Options A, B, and D either detect violations reactively or lack complete enforcement and automation across future accounts.
References (AWS CloudOps Documents / Study Guide):
* AWS Certified CloudOps Engineer - Associate (SOA-C03) Exam Guide - Domain 4: Security and Compliance
* AWS Control Tower - Preventive and Detective Guardrails
* AWS Organizations - Service Control Policies (SCPs)
* AWS Well-Architected Framework - Security Pillar (Governance and Centralized Controls)

NEW QUESTION # 154
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