Free Amazon DVA-C02 Exam Questions

Question 1

A developer is updating an Amazon API Gateway REST API to have a mock endpoint. The developer wants to update the integration request mapping template so the endpoint will respond to mock integration requests with specific HTTP status codes based on various conditions.

A : { if( $input.params(‘integration’) == "mock" ) "statusCode": 404 else "statusCode": 500 end }

B : { if( $input.params('scope') == "internal" ) "statusCode": 200 else "statusCode": 500 end }

C : { if( $input.path("integration") ) "statusCode": 200 else "statusCode":404 end }

D : { if( $context.integration.status ) "statusCode": 200 else "statusCode": 500 end }

Answer: D

Question 2

An application serves customers in several different geographical regions. Information about the location users connect from is written to logs stored in Amazon CloudWatch Logs. The company needs to publish an Amazon CloudWatch custom metric that tracks connections for each location.

Which approach will meet these requirements?

A : nfigure a CloudWatch Events rule that creates a custom metric from the CloudWatch Logs group.

B : ream data to an Amazon Elasticsearch cluster in near-real time and export a custom metric.

C : eate a CloudWatch metric filter to extract metrics from the log files with location as a dimension.

D : eate a CloudWatch Logs Insights query to extract the location information from the logs and to create a custom metric with location as a dimension.

Answer: C

Question 3

A team is developing an application that is deployed on Amazon EC2 instances. During testing, the team receives an error. The EC2 instances are unable to access an Amazon S3 bucket.

Which steps should the team take to troubleshoot this issue? (Choose two.)

A : eck whether the policy that is assigned to the IAM role that is attached to the EC2 instances grants access to Amazon S3.

B : eck the S3 bucket policy to validate the access permissions for the S3 bucket.

C : eck whether the policy that is assigned to the IAM user that is attached to the EC2 instances grants access to Amazon S3.

D : eck the S3 Lifecycle policy to validate the permissions that are assigned to the S3 bucket.

E : eck the security groups that are assigned to the EC2 instances. Make sure that a rule is not blocking the access to Amazon S3.

Answer: A,D

Question 4

An application writes items to an Amazon DynamoDB table. As the application scales to thousands of instances, calls to the DynamoDB API generate occasional ThrottlingException errors. The application is coded in a language that is incompatible with the AWS SDK.

What can be done to prevent the errors from occurring?

A : exponential backoff to the application logic

B : nd the items to DynamoDB through Amazon Kinesis Data Firehose

C : API calls through Amazon API Gateway

D : Amazon SQS as an API message bus

Answer: A

Question 5

company has a mobile app. The app includes an Amazon API Gateway REST API that invokes AWS Lambda functions. The Lambda functions process data from the app.

The company needs to test updated Lambda functions that have new features. The company must conduct these tests with a subset of users before deployment. The tests must not affect other users of the app.

Which solution will meet these requirements with the LEAST amount of operational effort?

A : Create a new version of each Lambda function with a weighted alias. Configure a weight value for each version of the Lambda function. Update the new weighted alias Amazon Resource Name (ARN) in the REST API.

B : Create a new REST API in API Gateway. Set up a Lambda proxy integration to connect to multiple Lambda functions. Enable canary settings on the deployment stage. Specify a smaller percentage of API traffic to go to the new version of the Lambda function.

C : Create a new version of each Lambda function. Integrate a predefined canary deployment in AWS CodeDeploy to slowly shift the traffic to the new versions automatically.

D : Create a new REST API in API Gateway. Set up a Lambda non-proxy integration to connect to multiple Lambda functions. Specify the necessary parameters and properties in API Gateway. Enable canary settings on the deployment stage. Specify a smaller percentage of API traffic to go to the new version of the Lambda function.

Answer: C