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Amazon SOA-C03 Exam Overview:

Certification Vendor:	AWS
Exam Name:	AWS Certified CloudOps Engineer - Associate
Exam Number:	SOA-C03
Available Languages:	Simplified Chinese, Korean, English, Japanese
Passing Score:	720 (scaled score, out of 100-1000)
Related Certifications:	AWS Certified CloudOps Engineer - Associate
Exam Price:	USD 150
Real Exam Qty:	65 (50 scored, 15 unscored)
Exam Duration:	130 minutes
Certificate Validity Period:	3 years
Exam Format:	Multiple response, Multiple choice
Sample Questions:	Amazon SOA-C03 Sample Questions
Exam Way:	Online (proctored) or at a testing center (Pearson VUE or PSI)
Pre Condition:	Recommended: 1 year of experience with AWS deployment, management, troubleshooting, networking, and security. Experience in an operations role such as system administrator is helpful.
Official Syllabus URL:	https://docs.aws.amazon.com/aws-certification/latest/sysops-administrator-associate-03/sysops-administrator-associate-03.html

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SOA-C03試験対策書、SOA-C03問題数

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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	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.
トピック 2	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 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	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 5	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.

Amazon AWS Certified CloudOps Engineer - Associate 認定 SOA-C03 試験問題 (Q261-Q266):

質問 # 261
A company hosts a production MySQL database on an Amazon Aurora single-node DB cluster. The database is queried heavily for reporting purposes. The DB cluster is experiencing periods of performance degradation because of high CPU utilization and maximum connections errors. A CloudOps engineer needs to improve the stability of the database.
Which solution will meet these requirements?

A. Create a multi-node Amazon ElastiCache cluster. Ensure that all reporting requests use the ElastiCache cluster. Use the database if the data is not in the cache.
B. Create a second Aurora MySQL single-node DB cluster in a second Availability Zone. Ensure that all reporting requests use the connection string for this additional node.
C. Create an AWS Lambda function that caches reporting requests. Ensure that all reporting requests call the Lambda function.
D. Create an Aurora Replica node. Create an Auto Scaling policy to scale replicas based on CPU utilization. Ensure that all reporting requests use the read-only connection string.

正解：D

解説：
Comprehensive and Detailed Explanation From Exact Extract of AWS CloudOps Doocuments:
Amazon Aurora supports up to 15 Aurora Replicas that share the same storage volume and provide read scaling and improved availability. Official guidance states that replicas "offload read traffic from the writer" and that you should direct read-only workloads to the reader endpoint, reducing CPU pressure and connection counts on the primary. Aurora also supports Replica Auto Scaling through Application Auto Scaling policies using metrics such as CPU utilization or connections to add or remove replicas automatically. This design addresses both high CPU and maximum connections by moving reporting traffic to read replicas while keeping a single write primary for OLTP. Option B creates a separate cluster with independent storage, increasing operational overhead and data synchronization complexity. Options C and D introduce application- layer caching changes that may not guarantee data freshness or relieve the write node directly. Therefore, adding read replicas and routing reporting to the reader endpoint, with auto scaling based on load, is the least intrusive, CloudOps-aligned way to stabilize performance.
References:* Amazon Aurora - Replicas and Reader Endpoint (Aurora User Guide)* Aurora Replica Auto Scaling (Aurora & Application Auto Scaling Guides)* AWS Well-Architected Framework - Reliability & Performance Efficiency

質問 # 262
An Amazon EC2 instance is running an application that uses Amazon Simple Queue Service (Amazon SQS) queues. A CloudOps engineer must ensure that the application can read, write, and delete messages from the SQS queues.
Which solution will meet these requirements in the MOST secure manner?

A. Create an IAM user with an IAM policy that allows the sqs:SendMessage permission, the sqs:
ReceiveMessage permission, and the sqs:DeleteMessage permission to the appropriate queues. Export the IAM user's access key and secret access key as environment variables on the EC2 instance.
B. Create and associate an IAM role that allows EC2 instances to call AWS services. Attach an IAM policy to the role that allows the sqs:SendMessage permission, the sqs:ReceiveMessage permission, and the sqs:DeleteMessage permission to the appropriate queues.
C. Create and associate an IAM role that allows EC2 instances to call AWS services. Attach an IAM policy to the role that allows sqs:* permissions to the appropriate queues.
D. Create an IAM user with an IAM policy that allows the sqs:SendMessage permission, the sqs:
ReceiveMessage permission, and the sqs:DeleteMessage permission to the appropriate queues. Embed the IAM user's credentials in the application's configuration.

正解：B

解説：
The most secure pattern is to use an IAM role for Amazon EC2 with the minimum required permissions.
AWS guidance states: "Use roles for applications that run on Amazon EC2 instances" and "grant least privilege by allowing only the actions required to perform a task." By attaching a role to the instance, short- lived credentials are automatically provided through the instance metadata service; this removes the need to create long-term access keys or embed secrets. Granting only sqs:SendMessage, sqs:ReceiveMessage, and sqs:DeleteMessage against the specific SQS queues enforces least privilege and aligns with CloudOps security controls. Options A and B rely on IAM user access keys, which contravene best practices for workloads on EC2 and increase credential-management risk. Option C uses a role but grants sqs:*, violating least-privilege principles. Therefore, Option D meets the security requirement with scoped, temporary credentials and precise permissions.
References:* AWS Certified CloudOps Engineer - Associate (SOA-C03) Exam Guide - Security & Compliance* IAM Best Practices - "Use roles instead of long-term access keys," "Grant least privilege"* IAM Roles for Amazon EC2 - Temporary credentials for applications on EC2* Amazon SQS - Identity and access management for Amazon SQS

質問 # 263
A company runs an application on Amazon EC2 instances. The instances are in three Availability Zones behind an Auto Scaling group and an Application Load Balancer (ALB). The ALB maps to an Amazon Route 53 alias record.
Amazon CloudWatch metrics show healthy instances in all three Availability Zones. However, instances in only two of the Availability Zones receive traffic.
Which solution will resolve this issue?

A. Disable cross-zone load balancing on the ALB.
B. Ensure that all the required subnets are correctly associated with the ALB.
C. Update the ALB's DNS mapping in Route 53 to use a CNAME record instead of an alias.
D. Enable cross-zone load balancing on the ALB.

正解：B

解説：
An Application Load Balancer can route traffic only to targets in Availability Zones that are enabled for the load balancer through associated subnets. If instances are healthy in three Availability Zones but only two receive traffic, the missing Availability Zone likely does not have its subnet associated with the ALB.

質問 # 264
A development team is setting up an Amazon EventBridge rule to look for Amazon Macie findings that have a severity score of 1 and a count of 2.
The development team receives the following event:

Which EventBridge event pattern will find the events that have a severity score of 1 and a count of 2?

正解：C

解説：
Amazon EventBridge event patterns must mirror the structure of the incoming event. The severity.score value is nested under detail.severity, while count is directly under detail. Specifying score as [1] and count as [2] causes EventBridge to match events only when both conditions are satisfied.

質問 # 265
A company needs to deploy instances of an application and associated infrastructure to multiple AWS Regions. The company wants to use a single AWS CloudFormation template to achieve this goal. The company uses AWS Organizations and wants to administer and run this template from a central administration account. What should a CloudOps engineer do to meet these requirements?

A. Create a CloudFormation template that is stored in Amazon S3. Configure Cross-Region Replication (CRR) on the S3 bucket. Reference the required accounts and remote Regions in the input template parameters.
B. In the central administration account, create a CloudFormation primary template that loads CloudFormation nested stacks from Amazon S3 buckets in the target Regions.
C. Create CloudFormation nested stacks by using a primary template in the central administration account. Configure the required accounts and Regions for deployment of the nested stacks.
D. Create a CloudFormation stack set that includes service-managed permissions. Deploy the stack set into the required accounts and Regions from the central administration account.

正解：D

解説：
AWS CloudFormation StackSets are designed specifically for deploying a single CloudFormation template across multiple AWS accounts and multiple AWS Regions. With service-managed permissions, StackSets integrate with AWS Organizations so the administrator does not need to manually create IAM roles in every target account. AWS documentation states that service- managed StackSets can deploy stacks to accounts managed by AWS Organizations in specific Regions and that CloudFormation creates the required IAM roles on your behalf. This directly satisfies central administration, multi-account deployment, and multi-Region deployment. Options A, B, and C add unnecessary complexity and do not provide native organization-wide lifecycle management. Nested stacks are useful for modular templates, not centralized deployment across many accounts and Regions. Therefore, StackSets with service-managed permissions is the correct CloudOps automation approach.

質問 # 266
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