Amazon DVA-C01 Online Practice Questions and Exam Preparation

Amazon DVA-C01 Online Questions & Answers

• Question 591:

  A customer wants to deploy its source code on an AWS Elastic Beanstalk environment. The customer needs to perform deployment with minimal outage and should only use existing instances to retain application access log.

  What deployment policy would satisfy these requirements?

  A. Rolling

  B. All at once

  C. Rolling with an additional batch

  D. Immutable

  Correct Answer: A

• Question 592:

  A company has an AWS CloudFormation template that is stored as a single file. The template is able to launch and create a full infrastructure stack.

  Which best practice would increase the maintainability of the template?

  A. Use nested stacks for common template patterns.

  B. Embed credentials to prevent typos.

  C. Remove mappings to decrease the number of variables.

  D. Use AWS::Include to reference publicly-hosted template files.

  Correct Answer: A

• Question 593:

  When a Developer tries to run an AWS CodeBuild project, it raises an error because the length of all environment variables exceeds the limit for the combined maximum of characters.

  What is the recommended solution?

  A. Add the export LC_ALL="en_US.utf8" command to the pre_build section to ensure POSIX localization.

  B. Use Amazon Cognito to store key-value pairs for large numbers of environment variables.

  C. Update the settings for the build project to use an Amazon S3 bucket for large numbers of environment variables.

  D. Use AWS Systems Manager Parameter Store to store large numbers of environment variables.

  Correct Answer: D

• Question 594:

  According to best practice, how should access keys be managed in AWS? (Choose two.)

  A. Use the same access key in all applications for consistency.

  B. Delete all access keys for the account root user.

  C. Leave unused access keys in the account for tracking purposes.

  D. Embed and encrypt access keys in code for continuous deployment.

  E. Use Amazon IAM roles instead of access keys where possible.

  Correct Answer: BE

• Question 595:

  A Developer decides lo store highly secure data in Amazon S3 and wants to implement server-side encryption (SSF) with granular control of who can access the master key Company policy requires that the master key be created, rotated, and disabled easily when needed, all for security reasons.

  Which solution should be used to moot these requirements?

  A. SSE with Amazon S3 managed keys (SSE-S3)

  B. SSFE with AWS KMS managed keys (SSE KMS)

  C. SSE with AWS Secrets Manager

  D. SSE with customer provided encryption keys

  Correct Answer: B

• Question 596:

  A Developer has been asked to create an AWS Lambda function that is triggered any time updates are made to items in an Amazon DynamoDB table. The function has been created, and appropriate permissions have been added to the Lambda execution role. Amazon DynamoDB streams have been enabled for the table, but the function is still not being triggered.

  Which option would enable DynamoDB table updates to trigger the Lambda function?

  A. Change the StreamViewType parameter value to NEW_AND_OLD_IMAGES for the DynamoDB table

  B. Configure event source mapping for the Lambda function

  C. Map an Amazon SNS topic to the DynamoDB streams

  D. increase the maximum execution time (timeout) setting of the Lambda function

  Correct Answer: B

  https://docs.aws.amazon.com/en_us/amazondynamodb/latest/developerguide/Streams.Lambda.Tu torial.html Create an event source mapping to tell Lambda to send records from your stream to a Lambda function. You can create multiple event source mappings to process the same data with multiple Lambda functions, or process items from multiple streams with a single function.

• Question 597:

  Which of the following are valid SNS delivery transports? Choose 2 answers

  A. HTTP

  B. UDP

  C. SMS

  D. DynamoDB

  E. Named Pipes

  Correct Answer: AC

• Question 598:

  A Developer is using AWS CLI, but when running list commands on a large number of resources, it is timing out. What can be done to avoid this time-out?

  A. Use pagination

  B. Use shorthand syntax

  C. Use parameter values

  D. Use quoting strings

  Correct Answer: A

  Reference: https://docs.aws.amazon.com/cli/latest/userguide/cli-usage-pagination.html

• Question 599:

  An application displays a status dashboard. The status is updated by 1 KB messages from an SQS queue.

  Although the status changes infrequently, the Developer must minimize the time between the message arrival in the queue and the dashboard update.

  What technique provides the shortest delay in updating the dashboard?

  A. Retrieve the messages from the queue using long polling every 20 seconds.

  B. Reduce the size of the messages by compressing them before sending.

  C. Retrieve the messages from the queue using short polling every 10 seconds.

  D. Reduce the size of each message payload by sending it in two parts.

  Correct Answer: A

  https://docs.aws.amazon.com/ko_kr/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-short-and-long-polling.html#sqs-short-long-polling-differences

• Question 600:

  Where should the appspec.yml file be placed in order for AWS CodeDeploy to work?

  A. In the root of the application source code directory structure

  B. In the bin folder along with all the complied code

  C. In an S3 bucket

  D. In the same folder as the application configuration files

  Correct Answer: A