AWS-Certified-DevOps-Engineer-Professional Free Practice Test

A development team manages website deployments using AWS CodeDeploy blue/green deployments. The application is running on Amazon EC2 instances behind an Application Load Balancer in an Auto Scaling group.
When deploying a new revision, the team notices the deployment eventually fails, but it takes a long time to fail. After further inspection, the team discovers the AllowTrafflc lifecycle event ran for an hour and eventually failed without providing any other information. The team wants to ensure failure notices are delivered more quickly while maintaining application availability even upon failure.
Which combination of actions should be taken to meet these requirements? (Select TWO.)

1. A. Change the deployment configuration to CodeDeployDefault.AIIAtOnce to speed up the deployment process by deploying to all of the instances at the same time.
2. B. Create a CodeDeploy trigger for the deployment failure event and make the deployment fail as soon as a single health check failure is detected.
3. C. Reduce the HealthChecklntervalSeconds and UnhealthyThresholdCount values within the target group health checks to decrease the amount of time it takes for the application to be considered unhealthy.
4. D. Use the appspec.yml file to run a script on the AllowTraffic hook to perform lighter health checks on the application instead of making CodeDeploy wait for the target group health checks to pass.
5. E. Use the appspec.yml file to run a script on the BeforeAllowTraffic hook to perform health checks on the application and fail the deployment if the health checks performed by the script are not successful.

Correct Answer: AE

An ecommerce company uses a large number of Amazon EBS backed Amazon EC2 instances. To decrease manual work across all the instances, a DevOps engineer is tasked with automating restart actions when EC2 instance retirement events are scheduled.
How can this be accomplished?

1. A. Create a scheduled Amazon CloudWatch Events rule to execute an AWS Systems Manager automation document that checks if any EC2 instances are scheduled for retirement once a wee
2. B. If the instance is scheduled for retirement, the automation document will hibernate the instance.
3. C. Enable EC2 Auto Recovery on all of the instance
4. D. Create an AWS Config rule to limit the recovery to occur during a maintenance window only.
5. E. Reboot all EC2 instances during an approved maintenance window that is oil^ide of standard business hour
6. F. Set up Amazon CloudWatch alarms to send a notification in case any instance is failing EC2 instance status checks.
7. G. Set up an AWS Health Amazon CloudWatch Events rule to execute AWS Systems Manager automation documents that stop and start the EC2 instance when a retirement scheduled event occurs.

Correct Answer: D

A company wants to use AWS Systems Manager documents to bootstrap physical laptops for developers. The bootstrap code is stored in GitHub. A DevOps engineer has already created a Systems Manager activation, installed the Systems Manager agent with the registration code, and installed an activation ID on all the laptops.
Which set of steps should be taken next?

1. A. Configure the Systems Manager document to use the AWS-RunShellScript command to copy the files from GitHub to Amazon S3, then use the aws-downloadContent plugin with a source Type of S3.
2. B. Configure the Systems Manager document to use the aws-configurePackage plugin with an install action and point to the Git repository.
3. C. Configure the Systems Manager document to use the aws-downloadContent plugin with a sourceType of GitHub and sourcelnfo with the repository details.
4. D. Configure the Systems Manager document to use the aws:softwarelnventory plugin and run the script from the Git repository.

Correct Answer: D

An application runs on Amazon EC2 instances behind an Application Load Balancer (ALB). A DevOps engineer is using AWS CodeDeploy to release a new version. The deployment fails during the AllowTraffic lifecycle event, but a cause for the failure is not indicated in the deployment logs.
What would cause this?

1. A. The appspec.yml file contains an invalid script to execute in the AllowTraffic lifecycle hook.
2. B. The user who initiated the deployment does not have the necessary permissions to interact with the ALB
3. C. The health checks specified for the ALB target group are misconfigured.
4. D. The CodeDeploy agent was not installed in the EC2 instances that are part of the ALB target group.

Correct Answer: C

You are responsible for your company's large multi-tiered Windows-based web application running on Amazon EC2 instances situated behind a load balancer. While reviewing metrics, you've started noticing an upwards trend for slow customer page load time. Your manager has asked you to come up with a solution to ensure that customer load time is not affected by too many requests per second. Which technique would you use to solve this issue?

1. A. Re-deploy your infrastructure usingan AWS CloudFormation templat
2. B. Configure Elastic Load Balancing health checks to initiate a new AWS CloudFormation stack when health checks return failed.
3. C. Re-deploy your infrastructure using an AWS CloudFormation templat
4. D. Spin up a second AWS CloudFormation stac
5. E. Configure Elastic Load Balancing SpillOver functionality to spill over any slow connections to the second AWS CloudFormation stack.
6. F. Re-deploy your infrastructure using AWS CloudFormation, Elastic Beanstalk, and Auto Scalin
7. G. Set up your Auto Scalinggroup policies to scale based on the number of requests per second as well as the current customer load tim
8. H. •>/D- Re-deploy your application using an Auto Scaling templat
9. I. Configure the Auto Scaling template to spin up a new Elastic Beanstalk application when the customer load time surpasses your threshold.

Correct Answer: C
Auto Scaling helps you ensure that you have the correct number of Amazon CC2 instances available to handle the load for your application. You create collections of
CC2 instances, called Auto Scaling groups. You can specify the minimum number of instances in each Auto Scaling group, and Auto Scaling ensures that your group
never goes below this size. You can specify the maximum number of instances in each Auto Scaling group, and Auto Scaling ensures that yourgroup never goes
above this size. If you specify the desired capacity, either when you create the group or at any time thereafter.
Auto Scaling ensures that yourgroup has this many
instances. If you specify scaling policies, then Auto Scaling can launch or terminate instances as demand on your application increases or decreases.
Option A and B are invalid because Autoscaling is required to solve the issue to ensure the application can handle high traffic loads.
Option D is invalid because there is no Autoscaling template.
For more information on Autoscaling, please refer to the below document link: from AWS
http://docs.aws.amazon.com/autoscaling/latest/userguide/Whatl sAutoScaling.html