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Amazon SOA-C03 Exam Overview:

Certification Vendor:	Amazon Web Services (AWS)
Exam Name:	AWS Certified SysOps Administrator - Associate (SOA-C03)
Exam Number:	SOA-C03
Available Languages:	Japanese, Korean, German, English, Simplified Chinese, Spanish (Latin America), French
Passing Score:	720 (scaled score out of 1000)
Exam Format:	Multiple response, Multiple choice
Related Certifications:	AWS Certified Developer - Associate AWS Certified Solutions Architect - Associate
Real Exam Qty:	65 questions
Exam Duration:	130 minutes
Exam Price:	150 USD
Certificate Validity Period:	3 years
Recommended Training:	AWS Certified SysOps Administrator Associate Training (Official Learning Resources) AWS Skill Builder - SysOps Administrator Learning Path
Exam Registration:	AWS Certification Portal AWS Certification Official Registration
Sample Questions:	Amazon SOA-C03 Sample Questions
Exam Way:	Online proctored or test center delivery
Pre Condition:	No formal prerequisites, but AWS recommends at least 1 year of experience managing AWS workloads in a SysOps or cloud operations role.
Official Syllabus URL:	https://aws.amazon.com/certification/certified-sysops-administrator-associate/

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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	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 3	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 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	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.

Amazon AWS Certified CloudOps Engineer - Associate 認定 SOA-C03 試験問題 (Q309-Q314):

質問 # 309
A company is using an Amazon Aurora MySQL DB cluster that has point-in-time recovery, backtracking, and automatic backup enabled. A CloudOps engineer needs to roll back the DB cluster to a specific recovery point within the previous 72 hours. Restores must be completed in the same production DB cluster.
Which solution will meet these requirements?

A. Use point-in-time recovery to restore the existing DB cluster to the desired recovery point.
B. Create an AWS Lambda function to restore an automatic backup to the existing DB cluster.
C. Use backtracking to rewind the existing DB cluster to the desired recovery point.
D. Create an Aurora Replica. Promote the replica to replace the primary DB instance.

正解：C

解説：
As documented in AWS Cloud Operations and Database Recovery, Aurora Backtrack allows you to rewind the existing database cluster to a chosen point in time without creating a new cluster. This feature supports fine-grained rollback for accidental data changes, making it ideal for scenarios like table deletions or logical corruption.
Backtracking maintains continuous transaction logs and permits rewinding within a configurable window (up to 72 hours). It does not require creating a new cluster or endpoint, and it preserves the same production environment, fulfilling the operational requirement for in-place recovery.
In contrast, Point-in-Time Recovery (Option D) always creates a new cluster, while replica promotion (Option A) and Lambda restoration (Option B) are unrelated to immediate rollback operations.
Therefore, Option C, using Aurora Backtrack, best meets the requirement for same-cluster restoration and minimal downtime.
Reference: AWS Cloud Operations & Database Management Guide - Section: Using Aurora Backtrack for Fast In-Place Recovery

質問 # 310
A company runs a non-production application on an Amazon EC2 instance. The application logs all error messages to a log file on the local file system. All entries that are written to the log file start with the word "error." A CloudOps engineer must implement a solution that gives the company the ability to search for all occurrences of the error during the previous year.
Which solution will meet this requirement?

A. Install the Amazon CloudWatch agent on the EC2 instance. Configure the agent to send logs to an Amazon CloudWatch Logs log group. Create a metric filter on the log group for all messages that include the word "error."
B. Configure the log file to send all messages to an Amazon S3 bucket. Create an event notification on the S3 bucket to publish the contents of the messages to an Amazon SQS queue.
C. Install the Amazon CloudWatch agent on the EC2 instance. Configure the agent to send an Amazon SNS message to an Amazon CloudWatch Logs log group. Create a metric filter on the log group for all messages that include the word "error."
D. Configure the log file to post all messages to an Amazon SQS queue. Create an AWS Lambda function. Configure the Lambda function to determine whether the messages include the word
"error."

正解：A

解説：
The CloudWatch agent can collect the application's local log file and send the entries to CloudWatch Logs, where they can be retained and searched over the required time period. A metric filter can identify log events containing the word "error," enabling the company to locate and analyze those occurrences efficiently.

質問 # 311
A company wants to use only IPv6 for all its Amazon EC2 instances. The EC2 instances must not be accessible from the internet, but the EC2 instances must be able to access the internet. The company creates a dual-stack VPC and IPv6-only subnets. How should a CloudOps engineer configure the VPC to meet these requirements?

A. Create and attach an egress-only internet gateway. Create a custom route table that includes an entry to point all IPv6 traffic to the egress-only internet gateway. Attach the custom route table to the IPv6-only subnets.
B. Create and attach an internet gateway. Create a custom route table that includes an entry to point all IPv6 traffic to the internet gateway. Attach the custom route table to the IPv6-only subnets.
C. Create and attach an internet gateway and a NAT gateway. Create a custom route table that includes an entry to point all IPv6 traffic to the internet gateway and all IPv4 traffic to the NAT gateway. Attach the custom route table to the IPv6-only subnets.
D. Create and attach a NAT gateway. Create a custom route table that includes an entry to point all IPv6 traffic to the NAT gateway. Attach the custom route table to the IPv6-only subnets.

正解：A

解説：
An egress-only internet gateway allows IPv6 resources in a VPC to initiate outbound connections to the internet while preventing unsolicited inbound connections from the internet. Routing IPv6 traffic from the IPv6-only subnets to the egress-only internet gateway provides internet access without making the EC2 instances directly reachable from the internet.

質問 # 312
A company hosts an ecommerce website on a fleet of Nitro-based Amazon EC2 Linux instances.
During a recent sales event, some customers reported HTTP timeout errors.
To help identify the root cause of the errors, a CloudOps engineer needs more detailed network metrics from the Elastic Network Adapter (ENA) driver. The CloudOps engineer must obtain the conntrack_allowance_available metric and the conntrack_allowance_exceeded metric.
Which solution will provide these metrics with the MOST operational efficiency?

A. Enable VPC Flow Logs. Filter by the conntrack_allowance_available metric and the conntrack_allowance_exceeded metric.
B. Install the Amazon CloudWatch agent on the instances. Filter by the
conntrack_allowance_available metric and the conntrack_allowance_exceeded metric.
C. Enable Performance Insights for the instances. Use Amazon CloudWatch to view the conntrack_allowance_available metric and the conntrack_allowance_exceeded metric.
D. Install the collectd daemon and the Amazon CloudWatch agent on the EC2 instances. Filter by the conntrack_allowance_available metric and the conntrack_allowance_exceeded metric.

正解：B

解説：
The Amazon CloudWatch agent can collect ENA driver network performance metrics from Nitro- based EC2 Linux instances, including connection tracking allowance metrics such as conntrack_allowance_available and conntrack_allowance_exceeded. This provides the needed instance-level network metrics directly in CloudWatch with the least operational overhead.

質問 # 313
A developer uses an Amazon Linux Amazon Machine Image (AMI) to launch an EC2 instance that hosts a third-party application. The application occasionally becomes unstable. The CloudOps engineer needs a solution to automatically reboot the EC2 instance whenever utilization is above 90% for 15 minutes and to notify the developer about the reboot.
Which solution will meet these requirements with the LEAST administrative effort?

A. Configure an Amazon CloudWatch alarm that evaluates the CPU utilization of the instance.
Configure the alarm to invoke an AWS Lambda function to publish a message to an Amazon Simple Notification Service (Amazon SNS) topic when the CloudWatch alarm activates. Configure the Lambda function to reboot the EC2 instance. Subscribe the developer to the SNS topic.
B. Create an AWS Systems Manager runbook script to publish a message to an Amazon Simple Notification Service (Amazon SNS) topic and to reboot the EC2 instance. Subscribe the developer to the SNS topic. Configure an Amazon CloudWatch alarm to run the Systems Manager runbook when CPU utilization for the instance remains above 90% for more than 15 minutes.
C. Create an Amazon CloudWatch alarm that evaluates the CPU utilization of the instance. Configure the alarm to publish a notification to an Amazon Simple Notification Service (Amazon SNS) topic and to perform an EC2 action to reboot the instance. Subscribe the developer to the SNS topic.
D. Create an Amazon CloudWatch alarm that evaluates the CPU utilization of the instance Configure the alarm to invoke an AWS Systems Manager action to create an incident to notify the developer and request the reboot.

正解：C

解説：
A CloudWatch alarm can directly trigger two actions when the threshold is breached:
- EC2 action to reboot the instance.
- SNS notification to alert the developer.
This requires no Lambda or Systems Manager runbooks and is therefore the simplest and least administrative option that fully meets the requirements (CPU > 90% for 15 minutes, automatic reboot, and notification).

質問 # 314
......

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