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Amazon DOP-C01 Online Prüfungen - DOP-C01 Prüfungsaufgaben

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Amazon AWS Certified DevOps Engineer - Professional DOP-C01 Prüfungsfragen mit Lösungen (Q173-Q178):

173. Frage
If Erin has three clusters of server types that are all managed by Ansible and she needs to provision each cluster so that they are configured with their appropriate NTP server addresses. What is the best method Erin should use in Ansible for managing this?

• A. Write a task that scans the network in the target hosts' region for the NTP server, register the resulting address so that the next task can write the NTP configuration.
• B. Create a playbook for each different region and store the NTP address in a variable in the play in the event the NTP server changes.
• C. Break down the hosts by region in the Ansible inventory file and assign an inventory group variable the NTP address value for the respective region. The playbook can contain just the single play referencing the NTP variable from the inventory.
• D. Create three plays, each one has the hosts for their respective regions and set the NTP server address in each task.

Antwort: C

Begründung:
While all four answers provided are correct, only B is the best choice. Ansible offers the ability to assign variables to groups of hosts in the inventory file. When the playbook is ran it will use the variables assigned to the group, even all the groups are specified in a single playbook run. The respective variables will be available to the play. This is easiest method to run, maintain and write.
Reference:
http://docs.ansible.com/ansible/intro_inventory.html#group-variables

174. Frage
You are hosting multiple environments in multiple regions and would like to use Amazon Inspector for regular security assessments on your AWS resources across all regions. Which statement about Amazon Inspector's operation across regions is true?

• A. Amazon Inspector is a global service that is not region-bound. You can include AWS resources from multiple regions in the same assessment target.
• B. Amazon Inspector is hosted in each supported region separately. You have to create assessment targets using the same name and tags in each region and Amazon Inspector will run against each assessment target in each region.
• C. Amazon Inspector is hosted within AWS regions behind a public endpoint. All regions are isolated from each other, and the telemetry and findings for all assessments performed within a region remain in that region and are not distributed by the service to other Amazon Inspector locations.
• D. Amazon Inspector is hosted in each supported region. Telemetry data and findings are shared across regions to provide complete assessment reports.

Antwort: C

Begründung:
At this time, Amazon Inspector supports assessment services for EC2 instances in only the following AWS regions:
US West (Oregon)
US East (N. Virginia)
EU (Ireland)
Asia Pacific (Seoul)
Asia Pacific (Mumbai)
Asia Pacific (Tokyo)
Asia Pacific (Sydney)
Amazon Inspector is hosted within AWS regions behind a public endpoint. All regions are isolated from each other, and the telemetry and findings for all assessments performed within a region remain in that region and are not distributed by the service to other Amazon Inspector locations.
Reference:
https://docs.aws.amazon.com/inspector/latest/userguide/inspector_supported_os_regions.html#in%
20spector_supported-regions

175. Frage
You are running Amazon CloudTrail on an Amazon S3 bucket and look at your most recent log.
You notice that the entries include the ListThings and CreateThings actions and wonder if your devices have been hacked. Based on these entries, what service would you be concerned may have been hacked?

• A. AWS CodePipeline
• B. Amazon Glacier
• C. Amazon Inspector
• D. AWS IoT

Antwort: D

Begründung:
AWS IoT (Internet of Things) is integrated with CloudTrail to capture API calls from the AWS IoT console or from your code to the AWS IoT APIs. AWS IoT provides secure, bi-directional communication between Internet-connected things (such as sensors, actuators, embedded devices, or smart appliances) and the AWS cloud. Using the information collected by CloudTrail, you can determine the request that was made to AWS IoT, the source IP address from which the request was made, who made the request, when it was made, and so on.
Reference:
http://docs.aws.amazon.com/iot/latest/developerguide/monitoring_overview.html#iot-using- cloudtrail

176. Frage
You have ana video processing application hosted in AWS. The video's are uploaded by users onto the site.
You have a program that is custom built to process those videos. The program is able to recover incase there
are any failures when processing the videos. Which of the following mechanisms can be used to deploy the
instances for carrying out the video processing activities, ensuring that the cost is kept at a minimum.

• A. Create a launch configuration with Reserved Instances. Ensure the User Data section details the
  installation of the custom software. Create an Autoscalinggroup with the launch configuration.
• B. Create a launch configuration with Dedicated Instances. Ensure the User Data section details the
  installation of the custom software. Create an Autoscaling group with the launch configuration.
• C. Create a launch configuration with Spot Instances. Ensure the User Data section details the installation
  of the custom software. Create an Autoscalinggroupwith the launch configuration.
• D. Create a launch configuration with On-Demand Instances. Ensure the User Data section details the
  installation of the custom software. Create an Autoscaling group with the launch configuration.

Antwort: C

Begründung:
Explanation
Since the application can recover from failures and cost is the priority, then Spot instances are the best bet for
this requirement. The launch configuration has the
facility to request for Spot Instances.
The below snapshot from the Launch configuration section shows that Spot Instances can be used for
AutoScaling Groups.

For more information on Spot Instances and Autoscaling, please visit the below URL:
* http://docs