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SOA-C03学習資料の内容はすべて、Amazon長年にわたる試験の概要と業界の発展動向に基づいて、MogiExam業界の専門家によって編集されています。 SOA-C03試験ガイドは、単なるテスト問題のパッチワークではなく、独自のシステムと階層レベルを備えているため、ユーザーは効果的に改善できます。 SOA-C03学習資料には、さまざまな被験者の特性と範囲に応じて試験の専門家が作成したテストペーパーが含まれています。 また、SOA-C03試験の質問で勉強すると、AWS Certified CloudOps Engineer - Associate試験に合格することになります。
質問 # 120
A CloudOps engineer launches an Amazon EC2 Linux instance in a public subnet. When the instance is running, the CloudOps engineer obtains the public IP address and attempts to remotely connect to the instance multiple times. However, the CloudOps engineer always receives a timeout error. Which action will allow the CloudOps engineer to remotely connect to the instance?
正解：D
解説：
SSH access to a Linux EC2 instance requires inbound TCP port 22 to be allowed by the instance's security group from the administrator's source IP address. A timeout usually indicates that network traffic is being blocked before the SSH service can respond. Since the instance is in a public subnet and has a public IP address, the most likely missing control is an inbound security group rule. Security groups are stateful, so return traffic is automatically allowed after inbound SSH is permitted. Adding a route for the engineer's IP address is not needed because public subnets use a default route to the internet gateway. An outbound-only NACL or security group rule does not allow inbound SSH initiation. Therefore, the correct remediation is to allow inbound SSH from the engineer's public IP.
質問 # 121
A company runs thousands of Amazon EC2 instances that are based on the Amazon Linux 2 Amazon Machine Image (AMI). A SysOps administrator must implement a solution to record commands and output from any user that needs an interactive session on one of the EC2 instances. The solution must log the data to a durable storage location. The solution also must provide automated notifications and alarms that are based on the log data.
Which solution will meet these requirements with the MOST operational efficiency?
正解：C
解説：
Comprehensive and Detailed Explanation From Exact Extract of AWS CloudOps Documents:
The most operationally efficient solution is C because AWS Systems Manager Session Manager is purpose- built for secure, auditable interactive access to EC2 instances at scale-without managing bastion hosts or distributing SSH keys. Session Manager can be configured to log session activity, including commands and output, to durable destinations such as Amazon CloudWatch Logs (and optionally Amazon S3). This directly satisfies the requirement to record interactive sessions and store logs durably.
For automated notifications and alarms, CloudWatch Logs supports metric filters that transform matching log patterns into CloudWatch metrics. Those metrics can then drive CloudWatch alarms and notifications (for example, via Amazon SNS). This is a standard CloudOps pattern: centralize logs, derive metrics from security-relevant patterns, and alert automatically.
Option A and D require installing and operating agents and building a more complex analytics path (Athena queries for alerting), which is less efficient and introduces more moving parts across thousands of instances.
Option B adds a bastion host dependency that becomes an operational burden (scaling, patching, hardening, HA) and a potential choke point. Session Manager reduces these burdens by using SSM Agent already installed, IAM-based access control, and centralized logging/monitoring integrations.
References:
AWS Systems Manager User Guide - Session Manager and session logging to CloudWatch Logs/S3 Amazon CloudWatch Logs User Guide - Metric filters and alarms from log patterns AWS SysOps Administrator Study Guide - Centralized logging, auditing, and operational monitoring
質問 # 122
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?
正解：B
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 # 123
A CloudOps engineer needs to build an event infrastructure for custom application-specific events. The events must be sent to an AWS Lambda function for processing. The CloudOps engineer must record the events so they can be replayed later by event type or event time. Which solution will meet these requirements?
正解：C
解説：
Amazon EventBridge supports custom event buses for application-specific events. EventBridge archives allow events to be retained and replayed later based on time ranges or event patterns, directly meeting the replay requirement.
Creating a custom event bus provides isolation and governance for application events. The archive preserves events automatically, and EventBridge rules route events to AWS Lambda for processing without custom code.
Options B and C do not properly align with custom event use cases or supported archive behavior.
Option D lacks native replay functionality.
Therefore, a custom event bus with an archive and rule is the correct solution.
質問 # 124
A SysOps administrator needs to implement a solution that protects credentials for an Amazon RDS for MySQL DB instance. The solution must rotate the credentials automatically one time every week.
Which combination of steps will meet these requirements? (Select TWO.)
正解：A、C
解説：
Comprehensive and Detailed Explanation From Exact Extract of AWS CloudOps Documents:
The correct answers are B and D. AWS CloudOps documentation clearly states that AWS Secrets Manager is the recommended service for storing and managing database credentials securely. Secrets Manager integrates natively with Amazon RDS and supports automatic, scheduled secret rotation.
To rotate credentials weekly, Secrets Manager requires a Lambda rotation function. AWS provides managed rotation templates for Amazon RDS for MySQL that update the database password and the stored secret atomically. This combination ensures credentials are protected, rotated automatically, and audited with minimal operational effort.
Option A is incorrect because RDS Proxy does not store or rotate credentials; it only retrieves them from Secrets Manager. Option C is incorrect because Systems Manager Parameter Store does not support native automatic rotation. Option E is incorrect because Automation runbooks are not the recommended mechanism for secrets rotation and add unnecessary complexity.
AWS CloudOps best practices strongly recommend Secrets Manager with Lambda-based rotation for database credential protection and compliance.
References:
AWS Secrets Manager User Guide - Automatic Rotation
Amazon RDS User Guide - Credential Management
AWS SysOps Administrator Study Guide - Secrets and Key Management
質問 # 125
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長年のマーケティングを通じて、当社のSOA-C03最新の認定ガイドは多くのお客様のサポートを獲得しています。最も明白なデータは、当社の製品が毎年徐々に増加していることであり、当社の製品開発のおかげでこのような大きな成功を達成するための大きな努力です。まず、資料の更新を研究する上で非常に良い仕事をしました。さらに、SOA-C03の実際のSOA-C03学習ガイド教材の品質は、教師によって厳密に管理されています。だから、私たちは正しい選択だと信じています。SOA-C03学習教材について質問がある場合は、ご相談ください。
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