Amazon AWS Certified Developer - Associate DVA-C02
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#191 (Accuracy: 100% / 2 votes)
A company is using Amazon API Gateway to develop an API for its application on AWS. A developer needs to test and generate API responses. Other teams are required to test the API immediately.

What should the developer do to meet these requirements?
  • A. Set up a mock integration request in API Gateway. Configure the method's integration request and integration response to associate a response with a given status code.
  • B. Set up the request validators in the API's OpenAPI definition file. Import the OpenAPI definitions into API Gateway to test the API.
  • C. Set up a gateway response for the API in API Gateway. Configure response headers with hardcoded HTTP status codes and responses.
  • D. Set up a request parameter-based Lambda authorizer to control access to the API. Configure the Lambda function with the necessary mapping template.
#192 (Accuracy: 100% / 3 votes)
A company has built a serverless application for its ecommerce website. The application includes a REST API in Amazon API Gateway that invokes an AWS Lambda function. The Lambda function processes data and stores the data in Amazon DynamoDB table. The Lambda function calls a third-party stock application API to process the order. After the ordered is processed, the Lambda function returns an HTTP 200 status code with no body to the client.

During peak usage when the API calls exceeds a certain threshold, the third-party stock application sometimes fails to process the data and responds with error messages. The company needs a solution that will not overwhelm the third-party stock application.

Which solution will meet these requirements?
  • A. Configure the REST API in API Gateway to write the requests directly into DynamoDB. Configure a DynamoDB intrinsic function to perform the transformation. Set up a DynamoDB stream to call the third-party stock application API with each new row. Delete the Lambda function.
  • B. Configure the REST API in API Gateway to write the requests directly into an Amazon Simple Queue Service (Amazon SQS) queue. Configure the Lambda function with a reserved concurrency equal to the third-party stock application's threshold. Set Lambda function to process the messages from the SQS queue.
  • C. Configure the REST API in API Gateway to write the requests directly into an Amazon Simple Notification Service (Amazon SNS) topic. Configure the Lambda function with a provisioned concurrency equal to the third-party stock application's threshold. Set the Lambda function to process the messages from the SNS topic.
  • D. Configure the REST API in API Gateway to write the requests directly into Amazon Athena. Configure the transformation of the data by using SQL with multiple query result locations set up to point to the DynamoDB table and the third-party stock fulfilment application API. Delete the Lambda function.
#193 (Accuracy: 100% / 4 votes)
A developer is building an application that invokes AWS Lambda functions asynchronously to process events. The developer notices that a Lambda function fails to process some events at random times. The developer needs to investigate the failed events and capture the events that the Lambda function fails to process.

Which solution will meet these requirements?
  • A. Add an Amazon EventBridge rule for the Lambda function. Configure the EventBridge rule to react to failed events and to store the events in an Amazon DynamoDB table.
  • B. Configure the Lambda function with a dead-letter queue based in Amazon Kinesis. Update the Lambda function's execution role with the required permissions.
  • C. Configure the Lambda function with an Amazon Simple Queue Service (Amazon SQS) dead-letter queue. Update the Lambda function's execution role with the required permissions.
  • D. Configure the Lambda function with an Amazon Simple Queue Service (Amazon SQS) FIFO dead-letter queue. Update the Lambda function's execution role with the required permissions.
#194 (Accuracy: 100% / 3 votes)
A developer is building an application on AWS. The application includes an AWS Lambda function that processes messages from an Amazon Simple Queue Service (Amazon SQS) queue.

The Lambda function sometimes fails or times out. The developer needs to figure out why the Lambda function fails to process some messages.

Which solution will meet these requirements with the LEAST operational overhead?
  • A. Increase the maximum timeout of the Lambda function to 15 minutes. Check the AWS CloudTrail event history for error details.
  • B. Increase the visibility timeout of the SQS queue. Check logs in Amazon CloudWatch Logs for error details.
  • C. Create a dead-letter queue. Configure the Lambda function to send the failed messages to the dead-letter queue.
  • D. Create an Amazon DynamoDB table. Update the Lambda function to send the failed messages to the DynamoDB table.
#195 (Accuracy: 100% / 4 votes)
A company is building a serverless application on AWS. The application uses Amazon API Gateway and AWS Lambda. The company wants to deploy the application to its development, test, and production environments.

Which solution will meet these requirements with the LEAST development effort?
  • A. Use API Gateway stage variables and create Lambda aliases to reference environment-specific resources.
  • B. Use Amazon Elastic Container Service (Amazon ECS) to deploy the application to the environments.
  • C. Duplicate the code for each environment. Deploy the code to a separate API Gateway stage.
  • D. Use AWS Elastic Beanstalk to deploy the application to the environments.
#196 (Accuracy: 100% / 4 votes)
A developer needs approval from a product owner before the developer can deploy code for an application to production. The developer uses AWS CodePipeline to deploy the application. The developer configures an Amazon Simple Notification Service (Amazon SNS) topic to send notifications to the product owner.

Which solution is the MOST operationally efficient way for the developer to receive approval from the product owner?
  • A. Add a new stage to CodePipeline before the production deployment. Add a manual approval action to the new stage. Add a new notification rule in the pipeline settings. Specify manual approval as the event that initiates the notification. Specify the SNS topic's Amazon Resource Name (ARN) to notify the product owner.
  • B. Develop an AWS Step Functions state machine that sends a notification to the product owner and accepts an approval. Add a new stage to CodePipeline before the production deployment. Add the state machine as a Step Functions action to the new stage.
  • C. Add a manual approval action to the existing production deployment stage in CodePipeline. Specify the SNS topic's Amazon Resource Name (ARN) while configuring the new manual approval action.
  • D. Edit the settings in CodePipeline. Create a new notification rule. Specify manual approval as the event that initiates the notification. Create a new notification target. Specify the SNS topic to notify the product owner. Save the notification rule.
#197 (Accuracy: 100% / 4 votes)
A company introduced a new feature that should be accessible to only a specific group of premium customers. A developer needs the ability to turn the feature on and off in response to performance and feedback. The developer needs a solution to validate and deploy these configurations quickly without causing any disruptions.

What should the developer do to meet these requirements?
  • A. Use AWS AppConfig to manage the feature configuration and to validate and deploy changes. Use feature flags to turn the feature on and off.
  • B. Use AWS Secrets Manager to securely manage and validate the feature configurations. Enable lifecycle rules to turn the feature on and off.
  • C. Use AWS Config to manage the feature configuration and validation. Set up AWS Config rules to turn the feature on and off based on predefined conditions.
  • D. Use AWS Systems Manager Parameter Store to store and validate the configuration settings for the feature. Enable lifecycle rules to turn the feature on and off.
#198 (Accuracy: 100% / 5 votes)
A company has an analytics application that uses an AWS Lambda function to process transaction data asynchronously. A developer notices that asynchronous invocations of the Lambda function sometimes fail. When failed Lambda function invocations occur, the developer wants to invoke a second Lambda function to handle errors and log details.

Which solution will meet these requirements?
  • A. Configure a Lambda function destination with a failure condition. Specify Lambda function as the destination type. Specify the error-handling Lambda function's Amazon Resource Name (ARN) as the resource.
  • B. Enable AWS X-Ray active tracing on the initial Lambda function. Configure X-Ray to capture stack traces of the failed invocations. Invoke the error-handling Lambda function by including the stack traces in the event object.
  • C. Configure a Lambda function trigger with a failure condition. Specify Lambda function as the destination type. Specify the error-handling Lambda function's Amazon Resource Name (ARN) as the resource.
  • D. Create a status check alarm on the initial Lambda function. Configure the alarm to invoke the error-handling Lambda function when the alarm is initiated. Ensure that the alarm passes the stack trace in the event object.
#199 (Accuracy: 100% / 5 votes)
A company has on-premises data centers that run an image processing service. The service consists of containerized applications that run on Kubernetes clusters. All the applications have access to the same NFS share for files and data storage.

The company is running out of NFS capacity in the data centers and needs to migrate to AWS as soon as possible. The Kubernetes clusters must be highly available on AWS.

Which combination of actions will meet these requirements? (Choose two.)
  • A. Transfer the information that is in the NFS share to an Amazon Elastic Block Store (Amazon EBS) volume. Upload the container images to Amazon Elastic Container Registry (Amazon ECR).
  • B. Transfer the information that is in the NFS share to an Amazon Elastic File System (Amazon EFS) volume. Upload the container images to Amazon Elastic Container Registry (Amazon ECR).
  • C. Create an Amazon Elastic Container Service (Amazon ECS) cluster to run the applications. Configure each node of the cluster to mount the Amazon Elastic Block Store (Amazon EBS) volume at the required path for the container images.
  • D. Create an Amazon Elastic Kubernetes Service (Amazon EKS) cluster to run the applications. Configure each node of the cluster to mount the Amazon Elastic Block Store (Amazon EBS) volume at the required path for the container images.
  • E. Create an Amazon Elastic Kubernetes Service (Amazon EKS) cluster to run the applications. Configure each node of the cluster to mount the Amazon Elastic File System (Amazon EFS) volume at the required path for the container images.
#200 (Accuracy: 100% / 5 votes)
A developer created an AWS Lambda function that performs a series of operations that involve multiple AWS services. The function's duration time is higher than normal. To determine the cause of the issue, the developer must investigate traffic between the services without changing the function code.

Which solution will meet these requirements?
  • A. Enable AWS X-Ray active tracing in the Lambda function. Review the logs in X-Ray.
  • B. Configure AWS CloudTrail. View the trail logs that are associated with the Lambda function.
  • C. Review the AWS Config logs in Amazon CloudWatch.
  • D. Review the Amazon CloudWatch logs that are associated with the Lambda function.