{
  "Update": "2022-04-06 16:00:52",
  "answer": [
    "A",
    "C",
    "D"
  ],
  "category": "sap",
  "choices": [
    "A. Deploy an autoscaling group of Java backend servers to provide high availability A.部署Java后端服务器的自动伸缩组以提供高可用性",
    "B. Use RDS Aurora as the database for the subscriber data because it is highly available and can scale up to 15 Read Replicas. B.使用RDS Aurora作为订户数据的数据库，因为它具有很高的可用性，并且可以扩展到15个只读副本。",
    "C. Create a DynamoDB database to hold subscriber data. Set up an autoscaling policy for the read/write throughput. C.创建一个DynamoDB数据库来保存订户数据。为读/写吞吐量设置自动缩放策略。",
    "D. Use AWS X-Ray SDK to record data about incoming and outgoing requests. View the statistics graph in X-Ray console. D.使用AWS X-Ray SDK记录有关传入和传出请求的数据。在X-Ray控制台中查看统计信息图。",
    "E. Trace the requests using AWS JAVA SDK and send logs to AWS CloudWatch Events. Create a CloudWatch dashboard to view the statistics. E.使用AWS JAVA SDK跟踪请求，并将日志发送到AWS CloudWatch Events。 创建一个CloudWatch仪表板以查看统计信息。"
  ],
  "detail": "Q145.A large IT company has an on-premise website which provides real-estate information such as renting, house prices and latest news to users. The website has a Java backend and a NoSQL MongoDB database that is used to store subscribers data. You are a cloud analyst and need to migrate the whole application to AWS platform. Your manager requires that a similar structure should be deployed in AWS for high availability. Moreover, a tracing framework is essential which can record data from both the client request and the downstream call to the database in AWS. Which AWS services should you choose to implement the migration? Select 3 Options.一家大型IT公司拥有一个本地网站，该网站向用户提供诸如租赁，房价和最新新闻之类的房地产信息。该网站具有Java后端和用于存储订户数据的NoSQL MongoDB数据库。您是云分析师，需要将整个应用程序迁移到AWS平台。您的经理要求在AWS中部署类似的结构以实现高可用性。此外，跟踪框架是必不可少的，它可以记录来自客户端请求和对AWS中数据库的下游调用的数据。您应该选择哪种AWS服务来实施迁移?选择3选项。",
  "explanation": [
    "The correct answer(s): A, C, D",
    "“record data from both the client request and the downstream call...”  ACD，auto scale的数据库和后端，x-ray可以分析微服务链路的调用  B，题目说了是nosql  E，cloudwatch只有log，这里还需要分析上下游请求的调用情况，例如ip、时间、数据量等"
  ],
  "id": 803,
  "saved_answer": null,
  "type": "Multiple Answer"
}