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Amazon SOA-C03 認定試験の出題範囲：

トピック	出題範囲
トピック 1	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.
トピック 2	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.
トピック 3	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.
トピック 4	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.
トピック 5	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.

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SOA-C03最新問題 & SOA-C03合格内容

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Amazon AWS Certified CloudOps Engineer - Associate 認定 SOA-C03 試験問題 (Q247-Q252):

質問 # 247
A company runs several production workloads on Amazon EC2 instances. A SysOps administrator discovered that a production EC2 instance failed a system health check. The SysOps administrator recovered the instance manually.
The SysOps administrator wants to automate the recovery task of EC2 instances and receive notifications whenever a system health check fails. Detailed monitoring is activated for all of the company's production EC2 instances.
Which of the following is the MOST operationally efficient solution that meets these requirements?

A. On each production EC2 instance, create a script that monitors the system health by sending a heartbeat notification every minute to a central monitoring server. If an EC2 instance fails to send a heartbeat, run a script on the monitoring server to stop and start the EC2 instance and to publish a notification to an Amazon Simple Notification Service (Amazon SNS) topic.
B. On each production EC2 instance, configure an Amazon CloudWatch agent to collect and send logs to a log group in Amazon CloudWatch Logs. Create a CloudWatch alarm that is based on a metric filter that tracks errors. Configure the alarm to invoke an AWS Lambda function to reboot the EC2 instance and send a notification email.
C. For each production EC2 instance, create an Amazon CloudWatch alarm for Status Check Failed:
System. Set the alarm action to recover the EC2 instance. Configure the alarm notification to be published to an Amazon Simple Notification Service (Amazon SNS) topic.
D. On each production EC2 instance, create a script that sends network pings to a highly available endpoint by way of a cron job. If the script detects a network response timeout, invoke a command to reboot the EC2 instance.

正解：C

解説：
EC2 status checks run every minute and expose a System check metric that indicates hardware or system-level impairment. CloudWatch alarms can trigger on Status Check Failed: System and automatically recover the instance (or take a defined action) without manual intervention, satisfying both the automatic recovery and alerting requirements. This approach minimizes manual steps and scales across many instances, leveraging built-in AWS health signals and standard notification channels. It is also consistent with AWS guidance on using CloudWatch alarms to recover impaired instances and to notify via SNS.

質問 # 248
A CloudOps engineer needs to implement a backup strategy for Amazon EC2 resources and Amazon RDS resources. The backup strategy must meet the following retention requirements:
- Daily backups: must be kept for 6 days
- Weekly backups: must be kept for 4 weeks
- Monthly backups: must be kept for 11 months
- Yearly backups: must be kept for 7 years
Which backup strategy will meet these requirements with the LEAST administrative effort?

A. Use AWS Backup to create a new backup plan for each retention requirement with a backup frequency of daily, weekly, monthly, or yearly. Set the retention period to match the requirement.
Create tags on each resource that needs to be backed up. Set up resource assignment by using the tags.
B. Use Amazon Data Lifecycle Manager to create an Amazon EBS snapshot policy. Create tags on each resource that needs to be backed up. Create multiple schedules according to the requirements within the policy. Set the appropriate frequency and retention period.
C. Use Amazon Data Lifecycle Manager to create an Amazon EBS snapshot policy. Create tags on each resource that needs to be backed up. Set up resource assignment by using the tags. Create multiple schedules according to the requirements within the policy. Set the appropriate frequency and retention period. In Amazon RDS, activate automated backups on the required DB instances.
D. Create an AWS Lambda function. Program the Lambda function to use native tooling to take backups of file systems in Amazon EC2 and to make copies of databases in Amazon RDS.
Create an Amazon EventBridge rule to invoke the Lambda function.

正解：A

解説：
AWS Backup provides centralized backup management for both Amazon EC2 and Amazon RDS resources. Separate backup plans can implement the required daily, weekly, monthly, and yearly schedules with matching retention periods, while tag-based resource assignments automatically include the appropriate resources. This provides the required retention strategy with the least administrative effort.

質問 # 249
A CloudOps engineer has an AWS CloudFormation template that deploys an encrypted Amazon Machine Image (AMI). The AMI is encrypted with an AWS KMS asymmetric key.
The CloudFormation template needs to be used in a second account. The CloudOps engineer copies the encrypted AMI to the second account. The new CloudFormation stack in the second account fails to launch.
Which action should the CloudOps engineer take to resolve this issue?

A. Update the CloudFormation template with the ID of the AMI in the second account. In the KMS key policy, allow the second account to access the KMS key.
B. Export the KMS key from the initial account. Import the KMS key into the second account. Update the CloudFormation template with the KMS key's new Amazon Resource Name (ARN).
C. Export the KMS key from the initial account. Change the AMI permissions to mark the AMI as public. Import the KMS key into the second account.
D. Convert the KMS key to a symmetric key. Copy the AMI to the second account. Deregister the AMI in the initial account. Register the AMI in the second account.

正解：A

解説：
When an encrypted AMI is used across AWS accounts, the destination account must have permission to use the customer managed KMS key that protects the AMI's encrypted snapshots, and the CloudFormation template must reference the AMI ID that exists in the destination account. AWS supports granting another account access through the KMS key policy.

質問 # 250
A company is storing backups in an Amazon S3 bucket. The backups must not be deleted for at least 3 months after the backups are created.
What should a CloudOps engineer do to meet this requirement?

A. Enable S3 Object Lock on a new S3 bucket in governance mode. Place all backups in the new S3 bucket with a retention period of 3 months.
B. Configure an IAM policy that denies the s3:DeleteObject action for all users. Three months after an object is written, remove the policy.
C. Enable S3 Versioning on the existing S3 bucket. Configure S3 Lifecycle rules to protect the backups.
D. Enable S3 Object Lock on a new S3 bucket in compliance mode. Place all backups in the new S3 bucket with a retention period of 3 months.

正解：D

解説：
S3 Object Lock in compliance mode prevents any user, including the root user, from deleting or modifying objects during the retention period. This guarantees that backups remain undeletable for the required 3 months. Object Lock must be enabled when the bucket is created, and compliance mode ensures regulatory-grade protection.

質問 # 251
A company has a microservice that runs on a set of Amazon EC2 instances. The EC2 instances run behind an Application Load Balancer (ALB).
A CloudOps engineer must use Amazon Route 53 to create a record that maps the ALB URL to example.com.
Which type of record will meet this requirement?

A. An AAAA record
B. An A record
C. An alias record
D. A CNAME record

正解：C

解説：
An alias record is the recommended Route 53 record type to map domain names (e.g., example.com) to AWS-managed resources such as an Application Load Balancer. Alias records are extension types of A or AAAA records that support AWS resources directly, providing automatic DNS integration and no additional query costs.
AWS documentation states:
"Use alias records to map your domain or subdomain to an AWS resource such as an Application Load Balancer, CloudFront distribution, or S3 website endpoint." A and AAAA records are used for static IP addresses, not load balancers. CNAME records cannot be used at the root domain (e.g., example.com). Thus, Option C is correct as it meets CloudOps networking best practices for scalable, managed DNS resolution to ALBs.
References (AWS CloudOps Documents / Study Guide):
* AWS Certified CloudOps Engineer - Associate (SOA-C03) Exam Guide - Domain 5: Networking and Content Delivery
* Amazon Route 53 Developer Guide - Alias Records
* AWS Well-Architected Framework - Reliability and Performance Efficiency Pillars
* Elastic Load Balancing - Integrating with Route 53

質問 # 252
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