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The AWS Certified DevOps Engineer – Professional or DOP-C01 exam focuses on DevOps engineers, developers, or any other specialist who is familiar with working with AWS software architecture.

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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q62-Q67):

NEW QUESTION # 62
A company is using an AWS CloudFormation template to deploy web applications. The template requires that manual changes be made for each of the three major environments: production, staging, and development. The current sprint includes the new implementation and configuration of AWS CodePipeline for automated deployments.
What changes should the DevOps Engineer make to ensure that the CloudFormation template is reusable across multiple pipelines?

• A. Set up a CodePipeline pipeline that has multiple stages, one for each development environment. Use AWS Lambda functions to trigger CloudFormation deployments to dynamically alter the UserData of the Amazon EC2 instances launched in each environment.
• B. Set up a CodePipeline pipeline for each environment to use input parameters. Use CloudFormation mappings to switch associated UserData for the Amazon EC2 instances to match the environment being launched.
• C. Use a CloudFormation custom resource to query the status of the CodePipeline to determine which environment is launched. Dynamically alter the launch configuration of the Amazon EC2 instances.
• D. Use CloudFormation input parameters to dynamically alter the LaunchConfiguration and UserData sections of each Amazon EC2 instance every time the CloudFormation stack is updated.

Answer: A

NEW QUESTION # 63
Your application requires long-term storage for backups and other data that you need to keep readily available but with lower cost. Which S3 storage option should you use?

• A. AmazonS3 Standard- Infrequent Access
• B. S3Standard
• C. Glacier
• D. ReducedRedundancy Storage

Answer: A

Explanation:
Explanation
The AWS Documentation mentions the following
Amazon S3 Standard - Infrequent Access (Standard - IA) is an Amazon S3 storage class for data that is accessed less frequently, but requires rapid access when needed. Standard - IA offers the high durability, throughput, and low latency of Amazon S3 Standard, with a low per GB storage price and per GB retrieval fee.
For more information on S3 Storage classes, please visit the below URL:
* https://aws.amazon.com/s3/storage-classes/

NEW QUESTION # 64
A company updated the AWS CloudFormation template tor a critical business application. The stack update process Tailed due to an error in me updated template, and CloudFormation automatically began the stack rollback process Later, a DevOps engineer found the application was still unavailable, and that the stack was in the UPDATE_ROLLBACK_FALED state Which combination of actions will allow the stack rollback to complete successful/? (Select TWO)

• A. Attach the AWSCloudFormationFulAccess IAM policy to the CloudFormation role
• B. Automatically heal the stack resources using CloudFormation drift detection.
• C. Update the existing CloudFormation stack using the original template
• D. Issue a ContinueUpdateRolback command from the CloudFormation console or AWS CLI
• E. Manually the resources to match the expectations of the stack.

Answer: A,B

NEW QUESTION # 65
You have a development team that is planning for continuous release cycles for their application. They want to
use the AWS services available to be able to deploy a web application and also ensure they can rollback to
previous versions fairly quickly. Which of the following options can be used to achieve this requirement.
Choose 2 answers from the options given below

• A. Usethe Elastic beanstalk service. Use Application versions and upload therevisions of your application.
  Deploy the revisions accordingly and rollback toprior versions accordingly.
• B. Usethe Elastic beanstalk service. Create separate environments for eachapplication revision. Revert back
  to an environment incase the new environmentdoes not work.
• C. Usethe Opswork service to deploy the web instances. Deploy the app to the Opsworkweb layer.
  Rollback using the Deploy app in Opswork. D.
  Usethe Cloudformation service. Create separate
  templates for each applicationrevision and deploy them accordingly.

Answer: A,C

Explanation:
Explanation
The AWS documentation mentions the following
In Elastic Beanstalk, an application version refers to a specific, labeled iteration of deployable code for a web
application. An application version points to an Amazon
Simple Storage Service (Amazon S3) object that contains the deployable code such as a Java WAR file. An
application version is part of an application. Applications
can have many versions and each application version is unique. In a running environment, you can deploy any
application version you already uploaded to the
application or you can upload and immediately deploy a new application version. You might upload multiple
application versions to test differences between one
version of your web application and another.
For more information on Elastic beanstalk components, please refer to the below link:
http://docs.aws.a
mazon.com/elasticbeanstalk/latest/dg/concepts.compo nents.htm I
An AWS OpsWorks Stacks app represents code that you want to run on an application server. The code itself
resides in a repository such as an Amazon S3 archive; the app contains the information required to deploy the
code to the appropriate application server instances. For more information on Opswork apps, please refer to
the below link:
* http://docs.aws.amazon.com/opsworks/latest/userguide/workingapps.html
Option B is incorrect. Our scenario is focusing on continuous development and continuous releases of the
application versions. Since this is going to be an ongoing process, it is a best practice to upload the revision of
your application and if required roll back to previous version.
Option D is incorrect. This question gives importance to the application hosted on the infrastructure.
"They want to use the AWS services available to be able to deploy a web application and also ensure they can
rollback to previous versions of the application quickly."
In this case, Cloud Formation provides a common language for you to describe and provision all the
infrastructure resources in your cloud environment. Cloud Formation allows you to use a simple text file to
model and provision, in an automated and secure manner, all the resources needed for your applications across
all regions and accounts.
Hence, Cloud Formation is nothing to do with an application hosted on the infrastructure.

NEW QUESTION # 66
As part of your deployment process, you are configuring your continuous integration (CI) system to build
AMIs. You want to build them in an automated manner that is also cost-efficient. Which method should you
use?

• A. Uploadall contents of the image to Amazon S3 launch the base instance, download allof the contents
  from Amazon S3 and create the AMI.
• B. Havethe CI system launch a new instance, bootstrap the code and apps onto theinstance and create an
  AMI out of it.
• C. Attachan Amazon EBS volume to your CI instance, build the root file system of yourimage on the
  volume, and use the Createlmage API call to create an AMI out ofthis volume.
• D. Havethe CI system launch a new spot instance bootstrap the code and apps onto theinstance and create
  an AMI out of it.

Answer: D

Explanation:
Explanation
The AWS documentation mentions the following
If your organization uses Jenkins software in a CI/CD pipeline, you can add Automation as a post-build step to
pre-install application releases into Amazon Machine Images (AMIs). You can also use the Jenkins scheduling
feature to call Automation and create your own operating system (OS) patching cadence
For more information on Automation with Jenkins, please visit the link:
* http://docs.aws.a
mazon.com/systems-manager/latest/userguide/automation-jenkinsJntm I
* https://wiki.jenkins.io/display/JCNKINS/Amazon < CC21 Plugin

NEW QUESTION # 67
......

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