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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q274-Q279):

NEW QUESTION # 274
A company's production environment uses an AWS CodeDeploy blue/green deployment to deploy an application. The deployment incudes Amazon EC2 Auto Scaling groups that launch instances that run Amazon Linux 2.
A working appspec. ymi file exists in the code repository and contains the following text.
A DevOps engineer needs to ensure that a script downloads and installs a license file onto the instances before the replacement instances start to handle request traffic. The DevOps engineer adds a hooks section to the appspec. yml file.
Which hook should the DevOps engineer use to run the script that downloads and installs the license file?

A. AfterBlockTraffic
B. Beforelnstall
C. Down load Bundle
D. BeforeBlockTraffic

Answer: B

Explanation:
This hook runs before the new application version is installed on the replacement instances. This is the best place to run the script because it ensures that the license file is downloaded and installed before the replacement instances start to handle request traffic. If you use any other hook, you may encounter errors or inconsistencies in your application.

NEW QUESTION # 275
A company uses AWS Organizations to manage multiple AWS accounts. The company needs a solution to improve the company's management of AWS resources in a production account.
The company wants to use AWS CloudFormation to manage all manually created infrastructure. The company must have the ability to strictly control who can make manual changes to AWS infrastructure. The solution must ensure that users can deploy new infrastructure only by making changes to a CloudFormation template that is stored in an AWS CodeConnections compatible Git provider.
Which combination of steps will meet these requirements with the LEAST implementation effort? (Select THREE).

A. Configure the CloudFormation infrastructure as code (IaC) generator to scan for existing resources in the AWS account. Create a CloudFormation template that includes the scanned resources. Import the CloudFormation template into a new CloudFormation stack.
B. Use CodeConnections to establish a connection between the Git provider and CloudFormation. Push the CloudFormation template to the Git repository. Sync the Git repository with the CloudFormation stack.
C. Create an IAM role, and set CloudFormation as the principal. Grant the IAM role access to manage the stack resources. Create an SCP that allows all actions to only the IAM role. Link the SCP with the production OU.
D. Configure AWS Config to scan for existing resources in the AWS account. Create a CloudFormation template that includes the scanned resources. Import the CloudFormation template into a new CloudFormation stack.
E. Create an IAM role, and set CloudFormation as the principal. Grant the IAM role access to manage the stack resources. Create an SCP that denies all actions to all the principals except by the IAM role. Link the SCP with the production OU.
F. Use CodeConnections to establish a connection between the Git provider and AWS CodePipeline. Push the CloudFormation template to the Git repository. Run a pipeline in CodePipeline that deploys the CloudFormation stack for every merge into the Git repository.

Answer: A,E,F

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
* Step A: Using a tool like CloudFormation resource import or IaC generator to scan and create a template from existing resources is efficient to bring current infrastructure under management.
* Step C: UsingCodeConnections(AWS's solution to connect Git repositories) with AWS CodePipeline ensures any changes to CloudFormation templates in the Git repo automatically deploy infrastructure changes, enforcing infrastructure as code workflows.
* Step E: Creating anIAM role with CloudFormation as the principalensures CloudFormation has permissions to manage resources. Using anSCP to deny all actions except by this roleenforces strict control, preventing manual changes outside the pipeline.Option B uses AWS Config which is more for compliance and auditing, not direct resource import. Option D is invalid because CloudFormation does not natively sync with Git; CodePipeline does. Option F is less secure than denying all except the IAM role.
Reference:
AWS CloudFormation Resource Import:"Import existing resources into CloudFormation stacks for management."(CloudFormation Resource Import) AWS CodePipeline and CodeConnections Integration:"Use CodeConnections to connect Git providers with AWS CodePipeline for continuous deployment."(AWS CodePipeline Git Integration) AWS Organizations SCP and IAM Role Best Practices:"Use SCPs to restrict actions and IAM roles with limited principals to enforce secure management."(AWS Organizations Best Practices)

NEW QUESTION # 276
A company is using an AWS CodeBuild project to build and package an application. The packages are copied to a shared Amazon S3 bucket before being deployed across multiple AWS accounts.
The buildspec.yml file contains the following:

The DevOps engineer has noticed that anybody with an AWS account is able to download the artifacts.
What steps should the DevOps engineer take to stop this?

A. Create an S3 bucket policy that grants read access to the relevant AWS accounts and denies read access to the principal "*".
B. Modify the post_build command to remove --acl authenticated-read and configure a bucket policy that allows read access to the relevant AWS accounts only.
C. Configure a default ACL for the S3 bucket that defines the set of authenticated users as the relevant AWS accounts only and grants read-only access.
D. Modify the post_build command to use --acl public-read and configure a bucket policy that grants read access to the relevant AWS accounts only.

Answer: B

NEW QUESTION # 277
An IT team has built an AWS CloudFormation template so others in the company can quickly and reliably deploy and terminate an application. The template creates an Amazon EC2 instance with a user data script to install the application and an Amazon S3 bucket that the application uses to serve static webpages while it is running.
All resources should be removed when the CloudFormation stack is deleted. However, the team observes that CloudFormation reports an error during stack deletion, and the S3 bucket created by the stack is not deleted.
How can the team resolve the error in the MOST efficient manner to ensure that all resources are deleted without errors?

A. Replace the EC2 and S3 bucket resources with a single AWS OpsWorks Stacks resource. Define a custom recipe for the stack to create and delete the EC2 instance and the S3 bucket.
B. Add a custom resource with an AWS Lambda function with the DependsOn attribute specifying the S3 bucket, and an IAM role. Write the Lambda function to delete all objects from the bucket when RequestType is Delete.
C. Add a DelelionPolicy attribute to the S3 bucket resource, with the value Delete forcing the bucket to be removed when the stack is deleted.
D. Identify the resource that was not deleted. Manually empty the S3 bucket and then delete it.

Answer: B

Explanation:
Explanation
https://aws.amazon.com/premiumsupport/knowledge-center/cloudformation-s3-custom-resources/

NEW QUESTION # 278
A company is using an AWS CodeBuild project to build and package an application. The packages are copied to a shared Amazon S3 bucket before being deployed across multiple AWS accounts.
The buildspec.yml file contains the following:

The DevOps engineer has noticed that anybody with an AWS account is able to download the artifacts.
What steps should the DevOps engineer take to stop this?

A. Create an S3 bucket policy that grants read access to the relevant AWS accounts and denies read access to the principal "*".
B. Modify the post_build command to remove --acl authenticated-read and configure a bucket policy that allows read access to the relevant AWS accounts only.
C. Configure a default ACL for the S3 bucket that defines the set of authenticated users as the relevant AWS accounts only and grants read-only access.
D. Modify the post_build command to use --acl public-read and configure a bucket policy that grants read access to the relevant AWS accounts only.

Answer: B

Explanation:
When setting the flag authenticated-read in the command line, the owner gets FULL_CONTROL. The AuthenticatedUsers group (Anyone with an AWS account) gets READ access. Reference: https://docs.aws.
amazon.com/AmazonS3/latest/userguide/acl-overview.html

NEW QUESTION # 279
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