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AWS Certified Solutions Architect - Professional 認定試験を受験するには、まずAWS Certified Solutions Architect - Associate 認定試験に合格する必要があります。この前提条件の認定試験は、AWSサービスと機能を使用してAWS上でスケーラブルで高可用性、耐障害性のあるシステムを設計・展開する能力を測定します。

Amazon AWS-Solutions-Architect-Professional（AWS Certified Solutions Architect-Professional）認定試験は、AWSクラウドソリューションの深い理解と複雑なクラウドシステムを設計および展開する能力を示すIT業界で非常に尊敬される認定です。この認定は雇用主によって非常に高く評価されており、クラウドソリューションアーキテクト、クラウドインフラアーキテクト、クラウド開発者などのITの役割に取り組んでいる個人にとって特に価値があります。

Amazon AWS Certified Solutions Architect - Professional 認定 AWS-Solutions-Architect-Professional 試験問題 (Q195-Q200):

質問 # 195
A company has automated the nightly retraining of its machine learning models by using AWS Step Functions. The workflow consists of multiple steps that use AWS Lambda Each step can fail for various reasons and any failure causes a failure of the overall workflow A review reveals that the retraining has failed multiple nights in a row without the company noticing the failure A solutions architect needs to improve the workflow so that notifications are sent for all types of failures in the retraining process Which combination of steps should the solutions architect take to meet these requirements? (Select THREE)

A. Add a Catch field all Task Map. and Parallel states that have a statement of "Error Equals": [ "States.
ALL"] and "Next": "Email".
B. Create a task named "Email" that forwards the input arguments to the SNS topic
C. Create a task named "Email" that forwards the input arguments to the SES email address
D. Add a new email address to Amazon Simple Email Service (Amazon SES). Verify the email address.
E. Create an Amazon Simple Notification Service (Amazon SNS) topic with a subscription of type "Email" that targets the team's mailing list.
F. Add a Catch field to all Task Map, and Parallel states that have a statement of "Error Equals": [ "states.
Runtime"] and "Next": "Email".

正解：A、B、E

解説：
Create an Amazon Simple Notification Service (Amazon SNS) topic with a subscription of type "Email" that targets the team's mailing list. This will create a topic for sending notifications and add a subscription for the team's email list to that topic. C. Add a Catch field to all Task, Map, and Parallel states that have a statement of "ErrorEquals": [ "States.ALL" ] and "Next": "Email". This will ensure that any errors that occur in any of the steps in the workflow will trigger the "Email" task, which will forward the input arguments to the SNS topic created in step A. B. Create a task named "Email" that forwards the input arguments to the SNS topic. This will allow the company to send email notifications to the team's mailing list in case of any errors occurred in any step in the workflow.

質問 # 196
A Solutions Architect must design a highly available, stateless, REST service. The service will require multiple persistent storage layers for service object meta information and the delivery of content. Each request needs to be authenticated and securely processed. There is a requirement to keep costs as low as possible?
How can these requirements be met?

A. Set up Amazon API Gateway and create the required API resources and methods. Use an Amazon Cognito user pool to control access to the API. Configure the methods to use AWS Lambda proxy integrations, and process each resource with a unique AWS Lambda function.
Store request meta information in DynamoDB with Auto Scaling and static content in a secured S3 bucket. Generate presigned URLs when returning references to content stored in Amazon S3.
B. Use AWS Fargate to host a container that runs a self-contained REST service. Set up an Amazon ECS service that is fronted by an Application Load Balancer (ALB). Use a custom authenticator to control access to the API. Store request meta information in Amazon DynamoDB with Auto Scaling and static content in a secured S3 bucket. Make secure signed requests for Amazon S3 objects and proxy the data through the REST service interface.
C. Set up Amazon API Gateway and create the required API resources and methods. Use an Amazon API Gateway custom authorizer to control access to the API. Configure the methods to use AWS Lambda custom integrations, and process each resource with a unique Lambda function. Store request meta information in an Amazon ElastiCache Multi-AZ cluster and static content in a secured S3 bucket.
Generate presigned URLs when returning references to content stored in Amazon S3.
D. Use AWS Fargate to host a container that runs a self-contained REST service. Set up an ECS service that is fronted by a cross-zone ALB. Use an Amazon Cognito user pool to control access to the API.
Store request meta information in DynamoDB with Auto Scaling and static content in a secured S3 bucket. Generate presigned URLs when returning references to content stored in Amazon S3.

正解：A

解説：
The Cognito can be used for authentication. API Gateway for Stateless REST service.
A: uses custom authenticator. Self Contained REST service!!!
B: Self Contained REST service!!!
D: Elasticache is not persistent.

質問 # 197
A company recently completed the migration from an on-premises data center to the AWS Cloud by using a replatforming strategy. One of the migrated servers is running a legacy Simple Mail Transfer Protocol (SMTP) service that a critical application relies upon. The application sends outbound email messages to the company's customers. The legacy SMTP server does not support TLS encryption and uses TCP port 25. The application can use SMTP only.
The company decides to use Amazon Simple Email Service (Amazon SES) and to decommission the legacy SMTP server. The company has created and validated the SES domain. The company has lifted the SES limits.
What should the company do to modify the application to send email messages from Amazon SES?

A. Configure the application to use AWS SDKs to send email messages. Create an IAM user for Amazon SES. Generate API access keys. Use the access keys to authenticate with Amazon SES.
B. Configure the application to connect to Amazon SES by using TLS Wrapper. Create an IAM role that has ses:SendEmail and ses:SendRawEmail permissions. Attach the IAM role to an Amazon EC2 instance.
C. Configure the application to use the SES API to send email messages. Create an IAM role that has ses:SendEmail and ses:SendRawEmail permissions. Use the IAM role as a service role for Amazon SES.
D. Configure the application to connect to Amazon SES by using STARTTLS. Obtain Amazon SES SMTP credentials. Use the credentials to authenticate with Amazon SES.

正解：B

質問 # 198
You are the new IT architect in a company that operates a mobile sleep tracking application.
When activated at night, the mobile app is sending collected data points of 1 kilobyte every 5 minutes to your backend.
The backend takes care of authenticating the user and writing the data points into an Amazon DynamoDB table.
Every morning, you scan the table to extract and aggregate last night's data on a per user basis, and store the results in Amazon S3. Users are notified via Amazon SNS mobile push notifications that new data is available, which is parsed and visualized by the mobile app.
Currently you have around 100k users who are mostly based out of North America.
You have been tasked to optimize the architecture of the backend system to lower cost.
What would you recommend? (Choose 2)

A. Write data directly into an Amazon Redshift cluster replacing both Amazon DynamoDB and Amazon S3.
B. Create a new Amazon DynamoDB table each day and drop the one for the previous day after its data is on Amazon S3.
C. Have the mobile app access Amazon DynamoDB directly Instead of JSON files stored on Amazon S3.
D. Introduce Amazon Elasticache to cache reads from the Amazon DynamoDB table and reduce provisioned read throughput.
E. Introduce an Amazon SQS queue to buffer writes to the Amazon DynamoDB table and reduce provisioned write throughput.

正解：D、E

質問 # 199
A company wants to migrate its website from an on-premises data center onto AWS. At the same time, it wants to migrate the website to a containerized microservice-based architecture to improve the availability and cost efficiency. The company's security policy states that privileges and network permissions must be configured according to best practice, using least privilege.
A Solutions Architect must create a containerized architecture that meets the security requirements and has deployed the application to an Amazon ECS cluster.
What steps are required after the deployment to meet the requirements? (Choose two.)

A. Apply security groups to the tasks, and pass IAM credentials into the container at launch time to access other resources.
B. Apply security groups to the tasks, and use IAM roles for tasks to access other resources.
C. Apply security groups to Amazon EC2 instances, and use IAM roles for EC2 instances to access other resources.
D. Create tasks using the bridge network mode.
E. Create tasks using the awsvpc network mode.

正解：B、E

解説：
Explanation
https://aws.amazon.com/about-aws/whats-new/2017/11/amazon-ecs-introduces-awsvpc-networking-mode-for-co
https://amazonaws-china.com/blogs/compute/introducing-cloud-native-networking-for-ecs-containers/
https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task-iam-roles.html

質問 # 200
......

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