DVA-C01 (Page 18)

Deploy the image to the production Amazon Elastic Container Service (Amazon ECS) cluster by using AWS CodeDeploy.Recently, the CodeDeploy deployments began failing in Stage 4.The deployments are unable to perform rollbacks.The developer must minimize the number of failures that reach production without slowing down the pipeline.Which solution will meet these requirements?Read More →

A developer is troubleshooting an Amazon API Gateway API.Clients are receiving HTTP 400 response errors when the clients try to access an endpoint of the API.How can the developer determine the cause of these errors?Read More →

A developer has an application container, an AWS Lambda function, and an Amazon Simple Queue Service (Amazon SQS) queue.The Lambda function uses the SQS queue as an event source.The Lambda function makes a call to a third-party machine learning API when the function is invoked.The response from the third-party API can take up to 60 seconds to return.The Lambda function’s timeout value is currently 65 seconds.The developer has noticed that the Lambda function sometimes processes duplicate messages from the SQS queue.What should the developer do to ensure that the Lambda function does not process duplicate messages?Read More →

A developer is implementing an AWS Lambda function that will be invoked when an object is uploaded to Amazon S3.The developer wants to test the Lambda function in a local development machine before publishing the function to a production AWS account.Which solution will meet these requirements with the LEAST operational overhead?Read More →

A company deployed an application as a set of microservices that run on Amazon Elastic Container Service (Amazon ECS) behind an Application Load Balancer (ALB).The performance of the microservices has started to degrade for a specific set of user requests.The company needs to gain deeper insight into the request behavior that is associated with the performance degradation.Which process will meet this requirement?Read More →

A developer is building an application on Amazon EC2.The developer encountered an “Access Denied” error on some of the API calls to AWS services while testing.The developer needs to modify permissions that have been already given to the instance.How can these requirements be met with minimal changes and minimum downtime?Read More →

A developer wants to use AWS CodeDeploy to deploy an AWS Lambda function.What are the MINIMUM properties required in the ‘resources’ section of the AppSpec file for CodeDeploy to deploy the function successfully?Read More →

A developer is working on a serverless project.Initial testing shows that a cold start takes about 8 seconds on average for AWS Lambda functions.Which actions should the developer take to reduce the cold start time? (Choose two.)Read More →

A company is building a cloud solution to analyze customer demographic data.The data includes personally identifiable information (PII) such as full names, street addresses, and financial records.A developer is configuring a source Amazon DynamoDB table with a DynamoDB stream.The developer is writing an AWS Lambda function that will ingest the demographic data from the DynamoDB stream.perform analytics, and write results to a separate DynamoDB table.The application must log important AWS API workflow events for monitoring purposes, but the application must expose the PII.Which combination of actions should the developer take to log the LARGEST amount of AWS API operational information without exposing the PII? (Choose two.)Read More →

A media company wants to test its web application more frequently.The company deploys the application by using a separate AWS CloudFormation stack for each environment.The same CloudFormation template is deployed to each stack as the application progresses through the development lifecycle.A developer needs to build an automated alert for the quality assurance (QA) team.The developer wants the alert to occur for new deployments in the final pre-production environment.Which solution will moot these requirements?Read More →