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Free PDF Quiz 2025 AWS-DevOps-Engineer-Professional: AWS Certified DevOps Engineer - Professional Fantastic Accurate Answers

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The AWS-DevOps certification exam is intended for professionals who have experience in administering and managing AWS solutions and who want to validate their expertise in DevOps practices. Candidates should have a strong understanding of AWS services and architecture, as well as experience with automation and scripting languages such as Python, Ruby, or Perl. They should also be familiar with DevOps tools such as Jenkins, Puppet, and Chef.

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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q391-Q396):

NEW QUESTION # 391
What is web identity federation?

A. Use of AWS IAM User tokens to log in as a Google or Facebook user.
B. Use of an identity provider like Google or Facebook to exchange for temporary AWS security credentials.
C. Use of AWS STS Tokens to log in as a Google or Facebook user.
D. Use of an identity provider like Google or Facebook to become an AWS IAM User.

Answer: B

Explanation:
... users of your app can sign in using a well-known identity provider (IdP) --such as Login with Amazon, Facebook, Google, or any other OpenID Connect (OIDC)-compatible IdP, receive an authentication token, and then exchange that token for temporary security credentials in AWS that map to an IAM role with permissions to use the resources in your AWS account.
http://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_providers_oidc.html

NEW QUESTION # 392
A Developer is maintaining a fleet of 50 Amazon EC2 Linux servers. The servers are part of an Amazon EC2 Auto Scaling group, and also use Elastic Load Balancing for load balancing.
Occasionally, some application servers are being terminated after failing ELB HTTP health checks. The Developer would like to perform a root cause analysis on the issue, but before being able to access application logs, the server is terminated.
How can log collection be automated?

A. Use Auto Scaling lifecycle hooks to put instances in a Terminating:Wait state. Create an Amazon CloudWatch Events rule for EC2 'Instance-terminate Lifecycle Action and trigger an AWS Lambda function that executes a SSM Run Command script to collect logs, push them to Amazon S3, and complete the lifecycle action once logs are collected.
B. Use Auto Scaling lifecycle hooks to put instances in a Terminating: Wait state. Create an Amazon CloudWatch subscription filter for EC2 Instance Terminate Successful and trigger a CloudWatch agent that executes a script to called logs, push them to Amazon S3, and complete the lifecycle action once logs are collected.
C. Use Auto Scaling lifecycle hooks to put instances in a Terminating: Wait state. Create a Config rule for EC2 Instance-terminate Lifecycle Action and trigger a step function that executes a script to collect logs, push them to Amazon S3, and complete the lifecycle action once logs are collected.
D. Use Auto Scaling lifecycle hooks to put instances in a Pending:Wait state. Create an Amazon CloudWatch Alarm for EC2 Instance Terminate Successful and trigger an AWS Lambda function that executes an SSM Run Command script to collect logs, push them to Amazon S3, and complete the lifecycle action once logs are collected.

Answer: C

NEW QUESTION # 393
An online company uses Amazon EC2 Auto Scaling extensively to provide an excellent customer experience while minimizing the number of running EC2 instances. The company's self-hosted Puppet environment in the application layer manages the configuration of the instances. The IT manager wants the lowest licensing costs and wants to ensure that whenever the EC2 Auto Scaling group scales down, removed EC2 instances are deregistered from the Puppet master as soon as possible.
How can the requirement be met?

A. Bake the AWS CodeDeploy agent into the base AMI. When the Auto Scaling group scales out, use CodeDeploy to install the Puppet agent, and execute a script to register the newly deployed instances to the Puppet master. When the Auto Scaling group scales in, use the CodeDeploy lifecycle hook to run a script to de-register the instance from the Puppet master.
ApplicationStop
B. Bake the AWS Systems Manager agent into the base AMI. When the Auto Scaling group scales out, use the AWS Systems Manager to install the Puppet agent, and run a script to register the newly deployed instances to the Puppet master. When the Auto Scaling group scales in, use the Systems Manager instance stop lifecycle hook to run a script to de-register the instance from the Puppet master.
C. At instance launch time, use EC2 user data to deploy the AWS CodeDeploy agent. Use CodeDeploy to install the Puppet agent. When the Auto Scaling group scales out, run a script to register the newly deployed instances to the Puppet master. When the Auto Scaling group scales in, use the EC2 Auto Scaling EC2_INSTANCE_TERMINATING lifecycle hook to trigger de- registration from the Puppet master.
D. At instance launch time, use EC2 user data to deploy the AWS CodeDeploy agent. When the Auto Scaling group scales out, use CodeDeploy to install the Puppet agent, and run a script to register the newly deployed instances to the Puppet master. When the Auto Scaling group scales in, use the EC2 user data instance stop script to run a script to de-register the instance from the Puppet master.

Answer: C

Explanation:
codedeploy agent is a software package that, when installed and configured on an instance, makes it possible for that instance to be used in CodeDeploy deployments.

NEW QUESTION # 394
A new zero-day vulnerability was found in OpenSSL requiring the immediate patching of a production web fleet running on Amazon Linux. Currently, OS updates are performed manually on a monthly basis and deployed using updates to the production Auto Scaling Group's launch configuration. Which method should a DevOps Engineer use to update packages in-place without downtime?

A. Use Amazon EC2 Run Command to issue a package update command to all running production instances, and update the AMI for future deployments.
B. Define a new AWS OpsWorks layer to match the running production instances, and use a recipe to issue a package update command to all running production instances.
C. Use AWS Inspector to run "yum upgrade" on all running production instances, and manually update the AMI for the next maintenance window.
D. Use AWS CodePipline and AWS CodeBuild to generate new copies of these packages, and update the Auto Scaling group's launch configuration.

Answer: A

Explanation:
https://aws.amazon.com/blogs/aws/ec2-run-command-is-now-a-cloudwatch-events-target/
" EC2 Run Command is part of EC2 Systems Manager. It allows you to operate on collections of EC2 instances and on-premises servers reliably and at scale, in a controlled and selective fashion. You can run scripts, install software, collect metrics and log files, manage patches, and much more, on both Windows and Linux."

NEW QUESTION # 395
For AWS CloudFormation, which stack state refuses UpdateStack calls?

A. <code>UPDATE_ROLLBACK_FAILED</code>
B. <code>UPDATE_ROLLBACK_COMPLETE</code>
C. <code>UPDATE_COMPLETE</code>
D. <code>CREATE_COMPLETE</code>

Answer: A

Explanation:
When a stack is in the UPDATE_ROLLBACK_FAILED state, you can continue rolling it back to return it to a working state (to UPDATE_ROLLBACK_COMPLETE). You cannot update a stack that is in the UPDATE_ROLLBACK_FAILED state. However, if you can continue to roll it back, you can return the stack to its original settings and try to update it again.
http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks- continueu pdaterollback.html

NEW QUESTION # 396
......

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