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 company uses an AWS Lambda function to transfer files from an Amazon S3 bucket to the company ' sSFTP server. The Lambda function connects to the SFTP server by using credentials such as username andpassword. The company uses Lambda environment variables to store these credentials.A developer needs to implement encrypted username and password credentials.Which solution will meet these requirements?

A : Remove the user credentials from the Lambda environment. Implement 1AM database authentication.

B : Move the user credentials from Lambda environment variables to AWS Systems Manager ParameterStore.

C : Move the user credentials from Lambda environment variables to AWS Key Management Service(AWS KMS).

D : Move the user credentials from the Lambda environment to an encrypted .txt file. Store the file in an S3bucket.

Answer: B

Question 3

A developer is writing an application that processes data delivered into an Amazon S3 bucket. The data isdelivered approximately 10 times per day , and the developer expects the processing to complete in less than1 minute on average.How can the developer deploy and invoke the application with the LOWEST cost and LOWEST latency ?

A : Deploy the application as an AWS Lambda function and invoke it by using an Amazon CloudWatchalarm that is triggered by an S3 object upload.

B : Deploy the application as an AWS Lambda function and invoke it by using an Amazon S3 eventnotification.

C : Deploy the application as an AWS Lambda function and invoke it by using an Amazon CloudWatchscheduled event.

D : Deploy the application on an Amazon EC2 instance and poll the S3 bucket for new objects.

Answer: B

Question 4

A developer is writing an application that processes data delivered into an Amazon S3 bucket. The data isdelivered approximately 10 times per day , and the developer expects the processing to complete in less than1 minute on average.How can the developer deploy and invoke the application with the LOWEST cost and LOWEST latency ?

A : Deploy the application as an AWS Lambda function and invoke it by using an Amazon CloudWatchalarm that is triggered by an S3 object upload.

B : Deploy the application as an AWS Lambda function and invoke it by using an Amazon S3 eventnotification.

C : Deploy the application as an AWS Lambda function and invoke it by using an Amazon CloudWatchscheduled event.

D : Deploy the application on an Amazon EC2 instance and poll the S3 bucket for new objects.

Answer: B

Question 5

A developer is creating a serverless application that uses an AWS Lambda function The developer will useAWS CloudFormation to deploy the application The application will write logs to Amazon CloudWatch LogsThe developer has created a log group in a CloudFormation template for the application to use The developerneeds to modify the CloudFormation template to make the name of the log group available to the applicationat runtimeWhich solution will meet this requirement?

A : Use the AWS:lnclude transform in CloudFormation to provide the log group ' s name to the application

B : Pass the log group ' s name to the application in the user data section of the CloudFormation template.

C : Use the CloudFormation template ' s Mappings section to specify the log group ' s name for theapplication.

D : Pass the log group ' s Amazon Resource Name (ARN) as an environment variable to the Lambdafunction

Answer: D