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花に欺く言語紹介より自分で体験したほうがいいです。Amazon SOA-C03問題集は我々Japancertでは直接に無料のダウンロードを楽しみにしています。弊社の経験豊かなチームはあなたに最も信頼性の高いAmazon SOA-C03問題集備考資料を作成して提供します。Amazon SOA-C03問題集の購買に何か質問があれば、我々の職員は皆様のお問い合わせを待っています。
質問 # 55
A CloudOps engineer needs to ensure that AWS resources across multiple AWS accounts are tagged consistently. The company uses an organization in AWS Organizations to centrally manage the accounts. The company wants to implement cost allocation tags to accurately track the costs that are allocated to each business unit.
Which solution will meet these requirements with the LEAST operational overhead?
正解：A
解説：
AWS Organizations Tag Policies provide a centralized, scalable governance mechanism to standardize tagging across accounts. Tag policies let an organization define tag keys, allowed values, and tagging expectations, helping teams apply consistent tagging conventions across many accounts without building custom logic. This matches the requirement for consistent tags "across multiple accounts" with minimal operational overhead, because the policy is managed centrally and applied at the organization/OUs level.
For cost tracking, user-defined tags must be activated as cost allocation tags in AWS Billing and Cost Management. Enabling cost allocation tags is the required step to make those tags usable in billing views (for example, Cost Explorer allocation and reporting). Combining Tag Policies (governance/consistency) with cost allocation tag activation (billing attribution) directly meets both parts of the requirement.
Option B (CloudTrail + Lambda auto-tagging) is higher operational overhead: it requires event processing, permissions, continuous maintenance, exception handling, and careful logic to avoid incorrect tag assignments. Option C is partially relevant for compliance detection, but AWS Budgets does not "apply tags" to resources; Budgets is for cost/usage alerts and budget tracking. Option D can enforce tagged provisioning paths, but it's not comprehensive for all resource creation mechanisms and Trusted Advisor is not a global
"tag enforcement" engine.
Therefore, A is the most native and least-ops approach for consistent tags across an organization and enabling cost allocation tracking.
質問 # 56
A company deploys an application on Amazon EC2 instances in an Auto Scaling group behind an Application Load Balancer (ALB). The company wants to protect the application from SQL injection attacks.
Which solution will meet this requirement?
正解：D
解説：
The AWS Cloud Operations and Security documentation confirms that AWS WAF (Web Application Firewall) is designed to protect web applications from application-layer threats, including SQL injection, cross-site scripting (XSS), and other OWASP Top 10 vulnerabilities.
When integrated with an Application Load Balancer, AWS WAF inspects incoming traffic using rule groups. The AWS Managed Rules for SQL Injection Protection provide preconfigured, continuously updated filters that detect and block malicious SQL patterns.
AWS Shield (Standard or Advanced) defends against DDoS attacks, not application-layer SQL attacks, and vulnerability scanners (Option C) only detect, not prevent, exploitation.
Thus, Option D provides the correct, managed, and automated protection aligned with AWS best practices.
質問 # 57
A company uses Amazon EC2 Auto Scaling across multiple Availability Zones. The company must ensure that EC2 instances are provisioned in private subnets.
The company recently optimized its cloud infrastructure by reducing the number of NAT gateways in the company's VPC to one. Some EC2 instances lost internet connectivity after the infrastructure update. A CloudOps engineer must resolve the connectivity issue.
Which solution will meet this requirement?
正解：D
解説：
EC2 instances in private subnets cannot send traffic directly to the internet gateway because private subnets do not have a direct 0.0.0.0/0 route to the internet gateway. Instead, outbound IPv4 internet access from private subnets is typically provided by a NAT gateway that is deployed in a public subnet. Private subnet route tables then send default internet-bound traffic (0.0.0.0/0) to the NAT gateway as the target. The NAT gateway uses its Elastic IP address and the public subnet's route to the internet gateway to enable outbound connectivity while still preventing inbound internet-initiated connections to the private instances.
When the company reduced multiple NAT gateways to a single NAT gateway, the routing design likely became inconsistent across Availability Zones. In multi-AZ architectures, it is common to have one NAT gateway per AZ and have each private subnet route to the NAT gateway in the same AZ to maintain zonal resiliency and avoid cross-AZ dependencies. If NAT gateways were removed, some private subnets may still have route table entries that point to NAT gateways that no longer exist. Those subnets would immediately lose outbound internet connectivity. The fix is to update the route tables associated with the affected private subnets so that their 0.0.0.0/0 route targets the remaining NAT gateway.
Option C would violate the requirement that instances must be in private subnets; routing private subnet traffic directly to an internet gateway effectively makes the subnet public. Option A is unnecessary and adds operational burden; NAT instances require patching, scaling, and availability management. Option D does not address the routing target problem and is not how NAT gateway egress is restored for multiple subnets.
Therefore, correcting the private subnet route tables to send internet-bound traffic to the existing NAT gateway is the appropriate solution.
質問 # 58
A company's financial department needs to view the cost details of each project in an AWS account. A CloudOps engineer must perform the initial configuration that is required to view cost for each project in Cost Explorer. Which solution will meet this requirement?
正解：D
解説：
Cost allocation tags allow AWS costs to be categorized by project in Cost Explorer. After activating the relevant tag as a cost allocation tag, the company can apply a project-specific tag to resources and then filter or group Cost Explorer data by that tag to view costs for each project.
質問 # 59
A company's application is hosted by an internet provider at app.example.com. The company wants to access the application by using www.company.com, which the company owns and manages with Amazon Route 53.
Which Route 53 record should be created to address this requirement?
正解：C
解説：
Comprehensive Explanation (250-350 words):
When mapping one domain name to another domain name that is hosted outside AWS, a CNAME record is the correct DNS record type. CNAME records map an alias name (www.company.com) to a canonical domain name (app.example.com).
Alias records cannot be used to point to non-AWS resources. A and PTR records map IP addresses, not domain names, and are therefore not appropriate.
Because www.company.com is not the zone apex, a CNAME record is valid and supported. This solution requires no additional infrastructure and is the standard DNS approach for this scenario.
質問 # 60
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