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質問 # 556
A solutions architect manages a containerized application that is deployed on Amazon ECS. The application stores data in an Amazon DynamoDB database. The solutions architect must implement a solution to rotate the database credentials every 30 days. Which solution will meet these requirements with the LEAST development effort?
正解：C
解説：
AWS Secrets Manager is designed for storing and automatically rotating secrets on a schedule, which makes it the lowest-effort solution for rotating credentials every 30 days. AWS Systems Manager Parameter Store can store secure values, but AWS documentation specifically directs password rotation use cases to Secrets Manager rather than Parameter Store.
質問 # 557
A company uses AWS to run its workloads. The company uses AWS Organizations to manage its accounts.
The company needs to identify which departments are responsible for specific costs.
New accounts are constantly created in the Organizations account structure. The Organizations continuous integration and continuous delivery (CI/CD) framework already adds the populated department tag to the AWS resources. The company wants to use an AWS Cost Explorer report to identify the service costs by department from all AWS accounts.
Which combination of steps will meet these requirements with the MOST operational efficiency? (Select TWO.)
正解：A、E
解説：
To track costs by department, you must activate the custom department tag as a cost allocation tag in the AWS Organizations management account. Once activated, Cost Explorer and cost and usage reports can group costs by this tag for all linked accounts. The most operationally efficient way is to activate only the relevant department tag and create a cost and usage report grouped by that tag.
AWS Documentation Extract:
"To use a tag for cost allocation, you must activate it in the AWS Billing and Cost Management console.
After activation, you can use the tag to group costs in Cost Explorer and reports." (Source: AWS Cost Management documentation) A, E: aws:createdBy is not related to department cost grouping and is unnecessary.
B: Applying extra filters is optional; D is more direct and operationally efficient.
Reference: AWS Certified Solutions Architect - Official Study Guide, Cost Allocation and Tagging.
質問 # 558
A company hosts multiple applications on AWS for different product lines. The applications use different compute resources, including Amazon EC2 instances and Application Load Balancers. The applications run in different AWS accounts under the same organization in AWS Organizations across multiple AWS Regions.
Teams for each product line have tagged each compute resource in the individual accounts.
The company wants more details about the cost for each product line from the consolidated billing feature in Organizations.
Which combination of steps will meet these requirements? (Select TWO.)
正解：B、E
解説：
To break down consolidated billing costs by "product line" using tags, the company must use cost allocation tags and ensure those tags are activated for billing at the payer/management level. Because the teams have already applied user-defined tags to the compute resources across accounts, the correct approach is to (1) use those user-defined tags in the billing tools and (2) activate them so they appear in cost and usage reporting for consolidated billing.
B is required because cost reporting by product line depends on selecting the user-defined cost allocation tag key (for example, ProductLine=...) in AWS billing and cost management tooling (such as Cost Explorer reports). AWS-generated tags are not what teams typically use for chargeback by business dimension, and the scenario explicitly says teams tagged resources (i.e., user-defined).
E is required because in an AWS Organizations consolidated billing setup, cost allocation tag activation is handled centrally from the Organizations management account so that the tags can be used consistently in consolidated cost views and reporting. Activating tags centrally ensures the billing system recognizes and includes those tag dimensions in cost allocation data.
Option C is not relevant to billing breakdown; Resource Groups is for organizing and operating on resources, not for consolidated billing allocation. Option D is unnecessary in this scenario's intended best practice because activation for consolidated billing reporting is done from the management account to standardize reporting. In short, you tag resources (already done), then activate the tag for billing and use it in billing reports to see cost by product line across accounts and Regions.
Therefore, B and E together meet the requirement with the correct billing-focused steps.
質問 # 559
[Design High-Performing Architectures]
A company's website provides users with downloadable historical performance reports. The website needs a solution that will scale to meet the company's website demands globally. The solution should be cost-effective, limit the provisioning of infrastructure resources, and provide the fastest possible response time.
Which combination should a solutions architect recommend to meet these requirements?
正解：A
解説：
Cloudfront for rapid response and s3 to minimize infrastructure.
質問 # 560
A company deploys a stateful application on Amazon EC2 On-Demand Instances in multiple Availability Zones behind an Application Load Balancer (ALB). The application workload is predictable, and the company has not received any CPU usage alerts. The company expects to run the application for at least 1 year.
The company expects CPU usage to increase by 50% during an upcoming 2-week holiday period. The company wants to optimize costs for the application for both the holiday period and normal operations.
Which solution will meet these requirements in the MOST cost-effective way?
正解：B
解説：
The correct answer is B because the company has a predictable baseline workload that will run for at least
1 year , plus a temporary 2-week increase in demand during a holiday period. The most cost-effective approach is to use a long-term discount option for the steady-state workload and a flexible pricing model for the short-term burst capacity.
An EC2 Instance Savings Plan is a strong fit for the existing workload because it provides cost savings for committed EC2 usage while matching a stable, predictable application footprint. Since the company is already using EC2 and the workload pattern is known, this is an efficient commitment for the baseline capacity. For the additional temporary holiday demand, On-Demand Instances are appropriate because the extra capacity is needed only for a short duration. This avoids overcommitting to capacity that will not be used after the holiday period ends.
Option A is less cost-effective because it misses the savings opportunity for the predictable baseline workload. Option C is incorrect because the application is described as stateful , which makes Spot Instances a poor fit due to potential interruption. Option D is incorrect because purchasing a 12-month commitment for both the normal workload and the temporary holiday increase would likely result in paying for excess committed usage after the 2-week peak ends.
AWS cost optimization guidance recommends using discounted commitment models for steady-state usage and On-Demand for short-lived, temporary spikes. Therefore, the best answer is to use an EC2 Instance Savings Plan for the baseline and On-Demand Instances for the seasonal increase.
質問 # 561
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SAA-C03練習問題集: https://www.passtest.jp/Amazon/SAA-C03-shiken.html
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