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  3. AWS-CERTIFIED-DEVELOPER-ASSOCIATE

Amazon AWS-CERTIFIED-DEVELOPER-ASSOCIATE Exam (page: 14)
Amazon AWS Certified Developer - Associate DVA-C02
Updated on: 25-Dec-2025

Viewing Page 14 of 113
AWS-CERTIFIED-DEVELOPER-ASSOCIATE PDF 500 Questions

A company has a critical application on AWS. The application exposes an HTTP API by using Amazon API Gateway. The API is integrated with an AWS Lambda function. The application stores data in an Amazon RDS for MySQL DB instance with 2 virtual CPUs (vCPUs) and 64 GB of RAM.
Customers have reported that some of the API calls return HTTP 500 Internal Server Error responses. Amazon CloudWatch Logs shows errors for “too many connections.” The errors occur during peak usage times that are unpredictable.
The company needs to make the application resilient. The database cannot be down outside of scheduled maintenance hours.
Which solution will meet these requirements?

  1. Decrease the number of vCPUs for the DB instance. Increase the max_connections setting.
  2. Use Amazon RDS Proxy to create a proxy that connects to the DB instance. Update the Lambda function to connect to the proxy.
  3. Add a CloudWatch alarm that changes the DB instance class when the number of connections increases to more than 1,000.
  4. Add an Amazon EventBridge rule that increases the max_connections setting of the DB instance when CPU utilization is above 75%.

Answer(s): B



A company has installed smart meters in all its customer locations. The smart meters measure power usage at 1-minute intervals and send the usage readings to a remote endpoint for collection. The company needs to create an endpoint that will receive the smart meter readings and store the readings in a database. The company wants to store the location ID and timestamp information.
The company wants to give its customers low-latency access to their current usage and historical usage on demand. The company expects demand to increase significantly. The solution must not impact performance or include downtime while scaling.
Which solution will meet these requirements MOST cost-effectively?

  1. Store the smart meter readings in an Amazon RDS database. Create an index on the location ID and timestamp columns. Use the columns to filter on the customers' data.
  2. Store the smart meter readings in an Amazon DynamoDB table. Create a composite key by using the location ID and timestamp columns. Use the columns to filter on the customers' data.
  3. Store the smart meter readings in Amazon ElastiCache for Redis. Create a SortedSet key by using the location ID and timestamp columns. Use the columns to filter on the customers' data.
  4. Store the smart meter readings in Amazon S3. Partition the data by using the location ID and timestamp columns. Use Amazon Athena to filter on the customers' data.

Answer(s): B



A company is building a serverless application that uses AWS Lambda functions. The company needs to create a set of test events to test Lambda functions in a development environment. The test events will be created once and then will be used by all the developers in an IAM developer group. The test events must be editable by any of the IAM users in the IAM developer group.
Which solution will meet these requirements?

  1. Create and store the test events in Amazon S3 as JSON objects. Allow S3 bucket access to all IAM users.
  2. Create the test events. Configure the event sharing settings to make the test events shareable.
  3. Create and store the test events in Amazon DynamoDB. Allow access to DynamoDB by using IAM roles.
  4. Create the test events. Configure the event sharing settings to make the test events private.

Answer(s): B



A developer is configuring an application's deployment environment in AWS CodePipeline. The application code is stored in a GitHub repository. The developer wants to ensure that the repository package's unit tests run in the new deployment environment. The developer has already set the pipeline's source provider to GitHub and has specified the repository and branch to use in the deployment.
Which combination of steps should the developer take next to meet these requirements with the LEAST overhead? (Choose two.)

  1. Create an AWS CodeCommit project. Add the repository package's build and test commands to the project's buildspec.
  2. Create an AWS CodeBuild project. Add the repository package's build and test commands to the project's buildspec.
  3. Create an AWS CodeDeploy project. Add the repository package's build and test commands to the project's buildspec.
  4. Add an action to the source stage. Specify the newly created project as the action provider. Specify the build artifact as the action's input artifact.
  5. Add a new stage to the pipeline after the source stage. Add an action to the new stage. Specify the newly created project as the action provider. Specify the source artifact as the action's input artifact.

Answer(s): B,E



An engineer created an A/B test of a new feature on an Amazon CloudWatch Evidently project. The engineer configured two variations of the feature (Variation A and Variation B) for the test. The engineer wants to work exclusively with Variation A. The engineer needs to make updates so that Variation A is the only variation that appears when the engineer hits the application's endpoint.
Which solution will meet this requirement?

  1. Add an override to the feature. Set the identifier of the override to the engineer's user ID. Set the variation to Variation
  2. Add an override to the feature. Set the identifier of the override to Variation A. Set the variation to 100%.
  3. Add an experiment to the project. Set the identifier of the experiment to Variation B. Set the variation to 0%.
  4. Add an experiment to the project. Set the identifier of the experiment to the AWS account's account ISet the variation to Variation A.

Answer(s): A



Viewing Page 14 of 113



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