As part of your deployment pipeline, you want to enable automated testing of your AWS CloudFormation
template. What testing should be performed to enable faster feedback while minimizing costs and risk? Select
three answers from the options given below

• A.Usethe AWS CloudFormation Validate Template to validate the syntax of the template
• B.Usethe AWS CloudFormation Validate Template to validate the properties ofresources defined in the
  template.
• C.Validatethe template's is syntax using a generalJSON parser.
• D.Validatethe AWS CloudFormation template against the official XSD scheme definitionpublished by
  Amazon Web Services.
• E.Updatethe stack with the template. If the template fails rollback will return thestack and its resources to
  exactly the same state.
• F.When creating the stack, specify an Amazon SNS topic to which your testing system is subscribed. Your
  testing system runs tests when it receives notification that the stack is created or updated.

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Which of the following are not valid sources for OpsWorks custom cookbook repositories?

• A.HTTP(S)
• B.Git
• C.AWS EBS
• D.Subversion

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You need to implement A/B deployments for several multi-tier web applications. Each of them has Its Individual infrastructure:
Amazon Elastic Compute Cloud (EC2) front-end servers, Amazon ElastiCache clusters, Amazon Simple Queue Service (SQS) queues, and Amazon Relational Database (RDS) Instances.
Which combination of services would give you the ability to control traffic between different deployed versions of your application? (Choose one.)

• A.Create one AWS Elastic Beanstalk application and all AWS resources (using configuration files inside the application source bundle) for each web application.
  New versions would be deployed a-eating Elastic Beanstalk environments and using the Swap URLs feature.
• B.Using AWS CloudFormation templates, create one Elastic Beanstalk application and all AWS resources (in the same template) for each web application.
  New versions would be deployed using AWS CloudFormation templates to create new Elastic Beanstalk environments, and traffic would be balanced between them using weighted Round Robin (WRR) records in Amazon Route53.
• C.Using AWS CloudFormation templates, create one Elastic Beanstalk application and all AWS resources (in the same template) for each web application.
  New versions would be deployed updating a parameter on the CloudFormation template and passing it to the cfn-hup helper daemon, and traffic would be balanced between them using Weighted Round Robin (WRR) records in Amazon Route 53.
• D.Create one Elastic Beanstalk application and all AWS resources (using configuration files inside the application source bundle) for each web application.
  New versions would be deployed updating the Elastic Beanstalk application version for the current Elastic Beanstalk environment.

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A company is running an application on Amazon EC2 instances in an Auto Scaling group. Recently, an issue occurred that prevented EC2 instances from launching successfully, and it took several hours for the Support team to discover the issue. The Support team wants to be notified by email whenever an EC2 instance does not start successfully.
Which action will accomplish this?

• A.Add a health check to the Auto Scaling group to invoke an AWS Lambda function whenever an instance status is impaired.
• B.Configure the Auto Scaling group to send a notification to an Amazon SNS topic whenever a failed instance launch occurs.
• C.Create an Amazon CloudWatch alarm that invokes an AWS Lambda function when a failed AttachInstances Auto Scaling API call is made.
• D.Create a status check alarm on Amazon EC2 to send a notification to an Amazon SNS topic whenever a status check fail occurs.

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A company is using AWS CodeDeploy to automate software deployment. The deployment must meet these requirements:
- A number of instances must be available to serve traffic during the
deployment. Traffic must be balanced across those instances, and the
instances must automatically heal in the event of failure.
- A new fleet of instances must be launched for deploying a new
revision automatically, with no manual provisioning.
- Traffic must be rerouted to the new environment to half of the new
instances at a time. The deployment should succeed if traffic is
rerouted to at least half of the instances; otherwise, it should fail.
- Before routing traffic to the new fleet of instances, the temporary
files generated during the deployment process must be deleted.
- At the end of a successful deployment, the original instances in the
deployment group must be deleted immediately to reduce costs.
How can a DevOps Engineer meet these requirements?

• A.Use an Application Load Balancer and an in-place deployment. Associate the Auto Scaling group with the deployment group. Use the Automatically copy Auto Scaling group option, and use CodeDeployDefault.OneAtAtime as the deployment configuration. Instruct AWS CodeDeploy to terminate the original instances in the deployment group, and use the AllowTraffic hook within appspec.yml to delete the temporary files.
• B.Use an Application Load Balancer and a blue/green deployment. Associate the Auto Scaling group and the Application Load Balancer target group with the deployment group. Use the Automatically option, create a custom deployment configuration with minimum copy Auto Scaling group healthy hosts defined as 50%, and assign the configuration to the deployment group. Instruct AWS CodeDeploy to terminate the original instances in the deployment group, and use the BeforeBlock Traffic hook within appsec.yml to delete the temporary files.
• C.Use an Application Load Balancer and a blue/green deployment. Associate the Auto Scaling group and the Application Load Balancer target group with the deployment group. Use the Automatically option, and use CodeDeployDefault HalfAtAtime as the deployment copy Auto Scaling group configuration. Instruct AWS CodeDeploy to terminate the original isntances in the deployment group, and use the BeforeAllowTraffic hook within appspec.yml to delete the temporary files.
• D.Use an Application Load Balancer and an in-place deployment. Associate the Auto Scaling group and Application Load Balancer target group with the deployment group. Use the Automatically copy option, and use CodeDeployDefault AllatOnce as a deployment configuration.
  Auto Scaling group
  Instruct AWS CodeDeploy to terminate the original instances in the deployment group, and use the BlockTraffic hook within appsec.yml to delete the temporary files.

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