Free Amazon DVA-C02 Exam Questions

Question 1

A company created an application to consume and process data. The application uses Amazon SQS and AWSLambda functions. The application is currently working as expected, but it occasionally receives severalmessages that it cannot process properly. The company needs to clear these messages to prevent the queuefrom becoming blocked. A developer must implement a solution that makes queue processing alwaysoperational. The solution must give the company the ability to defer the messages with errors and save thesemessages for further analysis. What is the MOST operationally efficient solution that meets theserequirements?

A : Configure Amazon CloudWatch Logs to save the error messages to a separate log stream.

B : Create a new SQS queue. Set the new queue as a dead-letter queue for the application queue. Configurethe Maximum Receives setting.

C : Change the SQS queue to a FIFO queue. Configure the message retention period to 0 seconds.

D : Configure an Amazon CloudWatch alarm for Lambda function errors. Publish messages to an AmazonSNS topic to notify administrator users.

Answer: B

Question 2

A developer is writing a web application that will run on AWS Lambda. The application will give users theability to log in to view private documents. All pages in the application must be designed to match thecompany ' s branding.How can the developer host the sign-in pages with the LEAST amount of custom code?

A : Upload files for the sign-in pages with the required branding to an Amazon S3 bucket. Configure staticwebsite hosting for the S3 bucket.

B : Create a Lambda function to serve the sign-in pages with the required branding. Configure AmazonAPI Gateway to route traffic to the function.

C : Create a Lambda@Edge function to serve the sign-in pages with the required branding. ConfigureAmazon CloudFront to invoke the function in response to user requests.

D : Configure an Amazon Cognito user pool with an Amazon Cognito hosted UI for the sign-in pages.Customize the pages with the required branding.

Answer: D

Question 3

A developer updates an AWS Lambda function that is integrated with an Amazon API Gateway API. The APIserves as the backend for a web application. The developer must test the updated Lambda function withoutaffecting production users .Which solution will meet these requirements in the MOST operationally efficient way?

A : Create a canary deployment on the existing API stage and test by using the production URL.

B : Change the API endpoint type to private and test by using the production URL.

C : Create a new API Gateway stage for testing and use stage variables to route traffic to the updatedLambda function.

D : Deploy a separate CloudFormation stack that duplicates the production API and Lambda function.

Answer: C

Question 4

A Developer is building an application that will store data relating to financial transactions in multiple DynamoDB tables. The Developer needs to ensure the transactions provide atomicity, isolation, and durability (ACID) and that changes are committed following an all-or nothing paradigm.

What write API should be used for the DynamoDB table?

A : ansactional

B : andard

C : entually consistent

D : rongly consistent

Answer: A

Question 5

A developer is building an application that uses an AWS Lambda function to process data. The applicationrequires minimum latency. The Lambda function must have predictable function start times. All setupactivities for the execution environment must happen before invocation of the Lambda function.Which solution will meet these requirements?

A : Increase the memory of the Lambda function to the maximum amount. Configure an AmazonEventBridge rule to schedule invocations of the Lambda function every minute to keep the executionenvironment active.

B : Optimize the static initialization code that runs when a new execution environment is prepared for thefirst time. Decrease and compress the size of the Lambda function package and the imported librariesand dependencies.

C : Increase the reserved concurrency of the Lambda function to the maximum value for unreservedaccount concurrency. Run any setup activities manually before the initial invocation of the Lambdafunction.

D : Publish a new version of the Lambda function. Configure provisioned concurrency for the Lambdafunction with the required minimum number of execution environments.

Answer: D