DVA-C01 (Page 32)

A developer is using Amazon S3 as the event source that invokes a Lambda function when new objects are created in the bucket.The event source mapping information is stored in the bucket notification configuration.The developer is working with different versions of the Lambda function, and has a constant need to update notification configuration so that Amazon S3 invokes the correct version.What is the MOST efficient and effective way to achieve mapping between the S3 event and Lambda?Read More →

An AWS Lambda function that Is running in a test environment is not working property.However, there is no error associated with the Lambda function in the Amazon CloudWatch logs for the account.The Lambda function’s permissions do not include a resource-based policy.The Lambda function’s execution role has properly configured trust relationships and has no permissions policies attached.Which action should a developer take to allow logs for the Lambda function to appear in CloudWatch?Read More →

A Lambda function processes data before sending it to a downstream service.Each piece of data is approximately 1MB in size.After a security audit, the function is now required to encrypt the data before sending it downstream.Which API call is required to perform the encryption?Read More →

A company wants to migrate an existing web application to AWS.The application consists of two web servers and a MySQL database.The company wants the application to automatically scale in response to demand.The company also wants to reduce its operational overhead for database backups and maintenance.The company needs the ability to deploy multiple versions of the application concurrently.What is the MOST operationally efficient solution that meets these requirements?Read More →

A company is using an AWS Lambda function to process records from an Amazon Kinesis data stream.The company recently observed slow processing of the records.A developer notices that the iterator age metric for the function is increasing and that the Lambda run duration is constantly above normal.Which actions should the developer take to increase the processing speed? (Choose two.)Read More →

A company is migrating a web application from on premises to AWS.The company needs to move session storage from the application code to a shared service as part of the migration.The session storage data must be encrypted at rest.Which AWS services meet these requirements? (Choose two.)Read More →

A developer supports an application that accesses data in an Amazon DynamoDB table.One of the item attributes is expiration Date in the timestamp format.The application uses this attribute to find items, archive them, and remove them from the table based on the timestamp value.The application will be decommissioned soon, and the developer must find another way to implement this functionality.The developer needs a solution that will require the least amount of code to write.Which solution will meet these requirements?Read More →

A developer has created a web API that uses Amazon Elastic Container Service (Amazon ECS) and an Application Load Balancer (ALB).An Amazon CloudFront distribution uses the API as an origin for web clients.The application has received millions of requests with a JSON Web Token (JWT) that is not valid in the authorization header.The developer has scaled out the application to handle the unauthenticated requests.What should the developer do to reduce the number of unauthenticated requests to the API?Read More →

A Developer is working on a serverless project based in Java.Initial testing shows a cold start takes about 8 seconds on average for AWS Lambda functions.What should the Developer do to reduce the cold start time? (Choose two.)Read More →

A company stores all personally identifiable information (PII) in an Amazon DynamoDB table named PII in Account A.Developers are working on an application that is running on Amazon EC2 instances in Account B.The application in Account B requires access to the PII table.An administrator in Account A creates an IAM role named AccessPII that has permission to access the PII table.The administrator also creates a trust policy that specifies Account B as a principal that can assume the role.Which combination of steps should the developers take in Account B to allow their application to access the PII table? (Choose two.)Read More →