Free Amazon DVA-C02 Exam Questions

Question 1

A company wants to use AWS AppConfig to gradually deploy a new feature to 15% of users to test the feature before a full deployment. Which solution will meet this requirement with the LEAST operational overhead?

A : Set up a custom script within the application to randomly select 15% of users. Assign a flag for the new feature to the selected users.

B : Create separate AWS AppConfig feature flags for both groups of users. Configure the flags to target 15% of users.

C : Create an AWS AppConfig feature flag. Define a variant for the new feature, and create a rule to target 15% of users.

D : Use AWS AppConfig to create a feature flag without variants. Implement a custom traffic splitting mechanism in the application code.

Answer: C

Question 2

A developer is building an event-driven application by using AWS Lambda and Amazon EventBridge. The Lambda function needs to push events to an EventBridge event bus. The developer uses an SDK to run the PutEvents EventBridge action and specifies no credentials in the code. After deploying the Lambda function, the developer notices that the function is failing and there are AccessDeniedException errors in the logs.

How should the developer resolve this issue?

A : Configure a VPC peering connection between the Lambda function and EventBridge.

B : Modify their AWS credentials to include permissions for the PutEvents EventBridge action.

C : Modify the Lambda function execution role to include permissions for the PutEvents EventBridge action.

D : Add a resource-based policy to the Lambda function to include permissions for the PutEvents EventBridge action.

Answer: C

Question 3

A developer needs to deploy an application running on AWS Fargate using Amazon ECS The application has environment variables that must be passed to a container for the application to initialize. How should the environment variables be passed to the container?

A : Define an array that includes the environment variables under the environment parameter within the service definition.

B : Define an array that includes the environment variables under the environment parameter within the task definition.

C : Define an array that includes the environment variables under the entryPoint parameter within the task definition.

D : Define an array that includes the environment variables under the entryPoint parameter within the service definition.

Answer: A

Question 4

A company must deploy all its Amazon RDS DB instances by using AWS CloudFormation templates as part of AWS CodePipeline continuous integration and continuous delivery (CI/CD) automation. The primary password for the DB instance must be automatically generated as part of the deployment process.

Which solution will meet these requirements with the LEAST development effort?

A : Create an AWS Lambda-backed CloudFormation custom resource. Write Lambda code that generates a secure string. Return the value of the secure string as a data field of the custom resource response object. Use the CloudFormation Fn::GetAtt intrinsic function to get the value of the secure string. Use the value to create the DB instance.

B : Use the AWS CodeBuild action of CodePipeline to generate a secure string by using the following AWS CLI command: aws secretsmanager get-random-password. Pass the generated secure string as a CloudFormation parameter with the NoEcho attribute set to true. Use the parameter reference to create the DB instance.

C : Create an AWS Lambda-backed CloudFormation custom resource. Write Lambda code that generates a secure string. Return the value of the secure string as a data field of the custom resource response object. Use the CloudFormation Fn::GetAtt intrinsic function to get a value of the secure string. Create secrets in AWS Secrets Manager. Use the secretsmanager dynamic reference to use the value stored in the secret to create the DB instance.

D : Use the AWS::SecretsManager::Secret resource to generate a secure string. Store the secure string as a secret in AWS Secrets Manager. Use the secretsmanager dynamic reference to use the value stored in the secret to create the DB instance.

Answer: B

Question 5

An Amazon Kinesis Data Stream has recently been configured to receive data from sensors in a manufacturing facility. A consumer EC2 instance is configured to process the data every 48 hours and save processing results to an Amazon RedShift data warehouse. Testing has identified a large amount of data is missing. A review of monitoring logs has identified that the sensors are sending data correctly and the EC2 instance is healthy.

What is the MOST likely explanation for this issue?

A : EC2 instance is failing intermittently

B : cords are retained for 24 hours in the Kinesis Data Stream by default

C : azon RedShift is not suitable for storing streaming data

D : azon Kinesis has too many shards provisioned

Answer: B