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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q165-Q170):

NEW QUESTION # 165
A Development team is currently using AWS CodeDeploy to deploy an application revision to an Auto Scaling group. If the deployment process fails, it must be rolled back automatically and a notification must be sent. What is the MOST effective configuration that can satisfy all of the requirements?

• A. Use AWS CloudTrail to monitor API calls made by or on behalf of CodeDeploy in the AWS account. Send an Amazon SNS message when deployment fails. Use AWS CLI to redeploy a previously deployed revision.
• B. Use available Amazon CloudWatch metrics for CodeDeploy to create CloudWatch alarms. Configure CloudWatch alarms to send out an Amazon SNS message when the deployment fails. Use AWS CLI to redeploy a previously deployed revision.
• C. Create Amazon CloudWatch Events rules for CodeDeploy operations. Configure a CloudWatch Events rule to send out an Amazon SNS message when the deployment fails. Configure CodeDeploy to automatically roll back when the deployment fails.
• D. Configure a CodeDeploy agent to create a trigger that will send notification to Amazon SNS topics when the deployment fails. Configure CodeDeploy to automatically roll back when the deployment fails.

Answer: D Explanation:
https://docs.aws.amazon.com/codedeploy/latest/userguide/monitoring-sns-event-notifications-create-trigger.html#monitoring-sns-event-notifications-create-trigger-console
NEW QUESTION # 166
A production account has a requirement that any Amazon EC2 instance that has been logged into manually must be terminated within 24 hours. All applications in the production account are using Auto Scaling groups with Amazon CloudWatch Logs agent configured.
How can this process be automated?

• A. Create a CloudWatch alarm that will trigger on the login event. Configure the alarm to send to an Amazon SQS queue. Use a group of worker instances to process messages from the queue, which then schedules the Amazon CloudWatch Events rule to trigger.
• B. Create a CloudWatch Logs subscription in an AWS Lambda function. Configure the function to add a tag to the EC2 instance that produced the login event and mark the instance to be decommissioned. Create a CloudWatch Events rule to trigger a daily Lambda function that terminates all instances with this tag.
• C. Create a CloudWatch alarm that will trigger on the login event. Send the notification to an Amazon SNS topic that the Operations team is subscribed to, and have them terminate the EC2 instance within 24 hours.
• D. Create a CloudWatch Logs subscription to an AWS Step Functions application. Configure the function to add a tag to the EC2 instance that produced the login event and mark the instance to be decommissioned.
  Then create a CloudWatch Events rule to trigger a second AWS Lambda function once a day that will terminate all instances with this tag.

Answer: B
NEW QUESTION # 167
You need to know when you spend $1000 or more on AWS. What's the easy way for you to see that
notification?

• A. AWS CloudWatch Events tied to API calls, when certain thresholds are exceeded, publish to SNS.
• B. Scrape the billing page periodically and publish to SNS.
• C. Scrape the billing page periodically and pump into Kinesis.
• D. AWS CloudWatch Metrics + Billing Alarm + Lambda event subscription. When a threshold is exceeded,
  email the manager.

Answer: D Explanation:
Even if you're careful to stay within the free tier, it's a good idea to create a billing alarm to notify you if you
exceed the limits of the free tier. Billing alarms can help to protect you against unknowingly accruing
charges if you inadvertently use a service outside of the free tier or if traffic exceeds your expectations.
Reference: http://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/free-tier-alarms.html
NEW QUESTION # 168
What is the maximum supported single-volume throughput on EBS?

• A. 160MiB/s
• B. 320MiB/s
• C. 640MiB/s
• D. 40MiB/s

Answer: B Explanation:
The ceiling throughput for PIOPS on EBS is 320MiB/s.
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSVolumeTypes.html
NEW QUESTION # 169
A retail company wants to use AWS Elastic Beanstalk to host its online sales website running on Java. Since this will be the production website, the CTO has the following requirements for the deployment strategy:
* Zero downtime. While the deployment is ongoing, the current Amazon EC2 instances in service should remain in service. No deployment or any other action should be performed on the EC2 instances because they serve production traffic.
* A new fleet of instances should be provisioned for deploying the new application version.
* Once the new application version is deployed successfully in the new fleet of instances, the new instances should be placed in service and the old ones should be removed.
* The rollback should be as easy as possible. If the new fleet of instances fail to deploy the new application version, they should be terminated and the current instances should continue serving traffic as normal.
* The resources within the environment (EC2 Auto Scaling group, Elastic Load Balancing, Elastic Beanstalk DNS CNAME) should remain the same and no DNS change should be made.
Which deployment strategy will meet the requirements?

• A. Use rolling deployments with additional batch with a fixed amount of one instance at a time and set the healthy threshold to OK.
• B. Use immutable environment updates to meet all the necessary requirements.
• C. launch a new environment and deploy the new application version there, then perform a CNAME swap between environments.
• D. Use rolling deployments with a fixed amount of one instance at a time and set the healthy threshold to OK.

Answer: D Explanation:
Explanation/Reference: https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/using-features.rolling-version-deploy.html
NEW QUESTION # 170
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