An application takes 40 seconds to process instructions received in an Amazon SQS message. Assuming the SQS queue is configured with the default VisibilityTimeout value, what is the BEST way, upon receiving a message, to ensure that no other instances can retrieve a message that has already been processed or is currently being processed? A. Use the ChangeMessageVisibility API to increase the Vis..

A Developer is creating a web application that requires authentication, but also needs to support guest access to provide users limited access without having to authenticate. What service can provide support for the application to allow guest access? A. IAM temporary credentials using AWS STS. B. Amazon Directory Service C. Amazon Cognito with unauthenticated access enabled D. IAM with SAML inte..

What are the steps to using the AWS CLI to launch a templatized serverless application? A. Use AWS CloudFormation get-template then CloudFormation execute-change-set. B. Use AWS CloudFormation validate-template then CloudFormation create-change-set. C. Use AWS CloudFormation package then CloudFormation deploy. D. Use AWS CloudFormation create-stack then CloudFormation update-stack. 템플리트화된 서버 없는 ..

A Developer has written a serverless application using multiple AWS services. The business logic is written as a Lambda function which has dependencies on third-party libraries. The Lambda function endpoints will be exposed using Amazon API Gateway. The Lambda function will write the information to Amazon DynamoDB. The Developer is ready to deploy the application but must have the ability to rol..

A Developer is working on an application that tracks hundreds of millions of product reviews in an Amazon DynamoDB table. The records include the data elements shown in the table: Which field, when used as the partition key, would result in the MOST consistent performance using DynamoDB? A. starRating B. reviewID C. comment D. productID 한 개발자가 아마존 다이너모DB 테이블에서 수억 건의 제품 리뷰를 추적하는 애플리케이션을 개발 중이다. 기..

A Developer is creating an Auto Scaling group whose instances need to publish a custom metric to Amazon CloudWatch. Which method would be the MOST secure way to authenticate a CloudWatch PUT request? A. Create an IAM user with PutMetricData permission and put the user credentials in a private repository; have applications pull the credentials as needed. B. Create an IAM user with PutMetricData p..

A Developer has created an S3 bucket s3://mycoolapp and has enabled server across logging that points to the folder s3://mycoolapp/logs. The Developer moved 100 KB of Cascading Style Sheets (CSS) documents to the folder s3://mycoolapp/css, and then stopped work. When the developer came back a few days later, the bucket was 50 GB. What is the MOST likely cause of this situation? A. The CSS files ..

A Developer created a dashboard for an application using Amazon API Gateway, Amazon S3, AWS Lambda, and Amazon RDS. The Developer needs an authentication mechanism allowing a user to sign in and view the dashboard. It must be accessible from mobile applications, desktops, and tablets, and must remember user preferences across platforms. Which AWS service should the Developer use to support this ..