The Audit tab of the Calm application shows the history of actions performed on the application, such as create, update, delete, launch, stop, etc. It also shows the status of the synchronization between Prism Central and Calm, which indicates if the changes made to the VMs on the AHV cluster are reflected in the Calm application. The administrator can check the Audit tab to verify the changes and troubleshoot any issues with the synchronization. Reference:
Nutanix NCP-MCA Certification Exam Sample Questions, Question 15
Nutanix Certified Professional - Multicloud Automation, Page 17
Nutanix Calm User Guide

The Plays dashboard in Prism Central provides a centralized view of all the Playbooks that have been executed across the clusters registered with Prism Central. It shows the status, duration, and output of each Playbook run, as well as the details of the triggers, targets, and actions involved. An administrator can use the Plays dashboard to troubleshoot why a Playbook failed to grow the memory of a VM by checking the error messages, logs, and output of the Playbook run. The other options are not the correct places to check for Playbook failures, as they do not provide the same level of information and visibility as the Plays dashboard. Reference: Nutanix Certified Professional - Multicloud Automation (NCP-MCA) v6.5, Nutanix Certified Professional - Multicloud Automation (NCP-MCA) 6 Exam, Nutanix Exam NCP-MCA Topic 4 Question 20 Discussion

In the context of Nutanix Multicloud Automation (NCP-MCA), the order of actions in a playbook is crucial for its successful execution. In this case, the playbook is designed to execute a script to fix a known problem in an application but keeps failing because it attempts to power off the VM and take a snapshot before executing the script. The correct order should be to execute the script first, then power off the VM if necessary, and finally take a snapshot.
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The PagerDuty Integration service allows you to create and manage incidents in PagerDuty based on events in Nutanix X-Play. To configure the PagerDuty Integration service, you need to provide the following information:
Service Name: The name of the PagerDuty service that you want to integrate with X-Play.
API Key: The API key generated from the PagerDuty service settings.
Plays: The plays that you want to trigger incidents in PagerDuty. You can select one or more plays from the list of available plays in X-Play. You can also specify the incident priority, escalation policy, and alert details for each play.
Alert Grouping: (Optional) The alert grouping strategy that you want to use for the PagerDuty incidents. You can choose from the following options:
Intelligent: PagerDuty will group alerts based on their content and context.
Time: PagerDuty will group alerts based on the time they are received.
None: PagerDuty will not group alerts and create a new incident for each alert. Reference: Nutanix Multicloud Automation Administration (NMCAA) course, Nutanix Certified Professional - Multicloud Automation (NCP-MCA) 6.5 Exam Guide, Process Automation | PagerDuty

US-EAST-1.
Explanation:
This solution meets the requirements of creating a multicloud, three-tier application using Calm. It ensures that each tier of the application has a redundant copy running on both Nutanix and AWS, and that the application can tolerate either a cloud provider outage or a local Nutanix cluster outage. The other options do not provide full redundancy for each tier, or require manual intervention to create the AWS instances. Reference: Nutanix Certified Professional - Multicloud Automation (NCP-MCA) Exam Blueprint Guide, page 10; Nutanix Multicloud Automation Administration (NMCAA) Course, Module 5: Blueprints.