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Amazon SAA-C03試験は、Amazon AWS Certified Solutions Architect - Associate認定試験の最新バージョンです。AWSプラットフォーム上でスケーラブルで高可用性で耐障害性のシステムの設計や展開の候補者の知識とスキルをテストするために設計されています。SAA-C03試験はAWSアーキテクチャ、ネットワーク、セキュリティ、ストレージ、データベース、コンピューティング、そしてAWSサービスなどの幅広いトピックをカバーしています。

Amazon AWS Certified Solutions Architect - Associate 認定 SAA-C03 試験問題 (Q262-Q267):

質問 # 262
A company runs a microservice-based serverless web application. The application must be able to retrieve data from multiple Amazon DynamoDB tables. A solutions architect needs to give the application the ability to retrieve the data with no impact on the baseline performance of the application.
Which solution will meet these requirements in the MOST operationally efficient way?

A. Amazon Athena Federated Query with a DynamoDB connector
B. AWSAppSync pipeline resolvers
C. Edge-optimized Amazon API Gateway with AWS Lambda functions
D. Amazon CloudFront with Lambda@Edge functions

正解：C

解説：
An edge-optimized API Gateway is a way to create RESTful APIs that can access multiple DynamoDB tables through AWS Lambda functions. The edge-optimized API Gateway provides low latency and high performance by caching API responses at CloudFront edge locations. The AWS Lambda functions can use the AWS SDK to query or scan the DynamoDB tables and return the data to the API Gateway. This solution meets all the requirements of the question, while the other options do not. Reference:
https://aws.amazon.com/blogs/compute/understanding-database-options-for-your-serverless-web-applications/
https://aws.amazon.com/getting-started/hands-on/build-serverless-web-app-lambda-apigateway-s3-dynamodb-cognito/module-3/
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/best-practices.html

質問 # 263
[Design High-Performing Architectures]
A company runs applications on AWS that connect to the company's Amazon RDS database. The applications scale on weekends and at peak times of the year. The company wants to scale the database more effectively for its applications that connect to the database.
Which solution will meet these requirements with the LEAST operational overhead?

A. Use Amazon RDS Proxy with a target group for the database. Change the applications to use the RDS Proxy endpoint.
B. Use a custom proxy that runs on Amazon EC2 as an intermediary to the database. Change the applications to use the custom proxy endpoint.
C. Use Amazon DynamoDB with connection pooling with a target group configuration for the database. Change the applications to use the DynamoDB endpoint.
D. Use an AWS Lambda function to provide connection pooling with a target group configuration for the database. Change the applications to use the Lambda function.

正解：A

解説：
Amazon RDS Proxy is a fully managed, highly available database proxy for Amazon Relational Database Service (RDS) that makes applications more scalable, more resilient to database failures, and more secure1. RDS Proxy allows applications to pool and share connections established with the database, improving database efficiency and application scalability2. RDS Proxy also reduces failover times for Aurora and RDS databases by up to66% and enables IAM authentication and Secrets Manager integration for database access1. RDS Proxy can be enabled for most applications with no code changes2.

質問 # 264
A gaming company hosts a browser-based application on AWS. The users of the application consume a large number of videos and images that are stored in Amazon S3. This content is the same for all users.
The application has increased in popularity, and millions of users worldwide are accessing these media files.
The company wants to provide the files to the users while reducing the load on the origin.
Which solution meets these requirements MOST cost-effectively?

A. Deploy an Amazon ElastiCache for Memcached instance in front of the web servers.
B. Deploy an Amazon ElastiCache for Redis instance in front of the web servers.
C. Deploy an AWS Global Accelerator accelerator in front of the web servers.
D. Deploy an Amazon CloudFront web distribution in front of the S3 bucket.

正解：D

解説：
Explanation
ElastiCache, enhances the performance of web applications by quickly retrieving information from fully-managed in-memory data stores. It utilizes Memcached and Redis, and manages to considerably reduce the time your applications would, otherwise, take to read data from disk-based databases. Amazon CloudFront supports dynamic content from HTTP and WebSocket protocols, which are based on the Transmission Control Protocol (TCP) protocol. Common use cases include dynamic API calls, web pages and web applications, as well as an application's static files such as audio and images. It also supports on-demand media streaming over HTTP. AWS Global Accelerator supports both User Datagram Protocol (UDP) and TCP-based protocols. It is commonly used for non-HTTP use cases, such as gaming, IoT and voice over IP. It is also good for HTTP use cases that need static IP addresses or fast regional failover

質問 # 265
A company uses Amazon Elastic Container Service (Amazon ECS) to run workloads that belong to service teams. Each service team uses an owner tag to specify the ECS containers that the team owns. The company wants to generate an AWS Cost Explorer report that shows how much each service team spends on ECS containers on a monthly basis.
Which combination of steps will meet these requirements in the MOST operationally efficient way? (Select TWO.)

A. Create a custom report in Cost Explorer. Apply a filter for Amazon ECS.
B. Set up AWS Compute Optimizer. Review the rightsizing recommendations.
C. Activate the owner tag as a cost allocation tag. Group the Cost Explorer report by the owner cost allocation tag.
D. Create a custom report in Cost Explorer. Apply a filter for the owner resource tag.
E. Activate the owner tag as a cost allocation tag. Group the Cost Explorer report by linked account.

正解：A、C

解説：
To allocate costs based on team ownership, AWS recommends tagging resources using cost allocation tags.
Activating the "owner" tag as a cost allocation tag allows AWS Cost Explorer to categorize and group spending. Additionally, filtering for Amazon ECS services enables the visibility into service-specific usage.
This approach is both scalable and operationally efficient.
Reference: AWS Documentation - AWS Billing and Cost Management, Cost Allocation Tags

質問 # 266
A company runs an AWS Lambda function in private subnets in a VPC. The subnets have a default route to the internet through an Amazon EC2 NAT instance. The Lambda function processes input data and saves its output as an object to Amazon S3.
Intermittently, the Lambda function times out while trying to upload the object because of saturated traffic on the NAT instance's network The company wants to access Amazon S3 without traversing the internet.
Which solution will meet these requirements?

A. Increase the size of the EC2 NAT instance in the VPC to a network optimized instance type
B. Provision a gateway endpoint for Amazon S3 in the VPC. Update the route tables of the subnets accordingly.
C. Replace the EC2 NAT instance with an AWS managed NAT gateway.
D. Provision a transit gateway. Place transit gateway attachments in the private subnets where the Lambda function is running.

正解：B

解説：
* Gateway Endpoint for Amazon S3: A VPC endpoint for Amazon S3 allows you to privately connect your VPC to Amazon S3 without requiring an internet gateway, NAT device, VPN connection, or AWS Direct Connect connection.
* Provisioning the Endpoint:
* Navigate to the VPC Dashboard.
* Select "Endpoints" and create a new endpoint.
* Choose the service name for S3 (com.amazonaws.region.s3).
* Select the appropriate VPC and subnets.
* Adjust the route tables of the subnets to include the new endpoint.
* Update Route Tables: Modify the route tables of the subnets to direct traffic destined for S3 to the newly created endpoint. This ensures that traffic to S3 does not go through the NAT instance, avoiding the saturated network and eliminating timeouts.
* Operational Efficiency: This solution minimizes operational overhead by removing dependency on the NAT instance and avoiding internet traffic, leading to more stable and secure S3 interactions.
References:
* VPC Endpoints for Amazon S3
* Creating a Gateway Endpoint

質問 # 267
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SAA-C03問題集無料 & SAA-C03予想試験

Amazon SAA-C03予想試験 & SAA-C03日本語講座

Amazon AWS Certified Solutions Architect - Associate 認定 SAA-C03 試験問題 (Q262-Q267):

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