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NCP-DB Fragenpool - NCP-DB Testengine

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Nutanix NCP-DB Prüfungsplan:

Thema
Einzelheiten

Thema 1

Describe NDB Concepts: It defines database and NDB terminology. The topic also explains benefits and features of NDB.

Thema 2

Administer an NDB Environment: While focusing on the administration of an NDB environment, this topic focuses on managing NDB profiles, applying procedural concepts, and managing networks in NDB. Lastly, the topic explains sub-topics of managing access controls in NDB and identifying how to use NDB APIs and CLI.

Thema 3

Monitor Alerts and Storage Usage Within an NDB Implementation: It is all about monitoring alerts and management of storage usage.

>> NCP-DB Fragenpool <<

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Nutanix Certified Professional - Database Automation (NCP-DB) v6.5 NCP-DB Prüfungsfragen mit Lösungen (Q206-Q211):

206. Frage
An administrator enables NDB Multi-cluster.
Which NDB Service component is deployed on a dedicated VM?

A. Repository DB
B. Agent VM
C. APIVM
D. HAProxy

Antwort: D

Begründung:
When an administrator enables NDB Multi-cluster functionality, certain components are deployed or reconfigured to support the distributed environment. HAProxy (High Availability Proxy) is a critical component that manages load balancing and secure communication across clusters. In a multi-cluster setup, HAProxy is deployed on a dedicated VM to ensure efficient traffic distribution and high availability for NDB services, such as API calls and GUI access, across the clusters. This dedicated deployment enhances scalability and resilience.
* Option A (Agent VM) is incorrect because Agent VMs are typically deployed on managed database VMs, not as dedicated NDB service components in multi-cluster setups.
* Option B (HAProxy) is correct as it is specifically deployed on a dedicated VM to handle load balancing in a multi-cluster NDB environment.
* Option C (Repository DB) is incorrect because the Repository DB is part of the NDB control plane and not necessarily deployed on a separate VM for multi-cluster purposes.
* Option D (APIVM) is incorrect because the API VM is part of the core NDB infrastructure but not specifically deployed as a dedicated VM for multi-cluster enablement.
References
* Nutanix Database Service (NDB) User Guide, Chapter 3: Configuring an NDB Environment, Section:
Multi-Cluster Configuration
* Nutanix Certified Professional - Database Automation (NCP-DB) v6.5 Blueprint, Section 3: Configure an NDB Environment

207. Frage
An administrator needs to provision a PostgreSQL cluster instance with an external Load Balancer. Which software can be omitted on the Reference VM while creating the Software Profile?

A. Patron
B. etcd
C. keepalived
D. HAProxy

Antwort: D

Begründung:
When provisioning a PostgreSQL cluster instance with an external load balancer in NDB, the administrator creates a software profile from a reference VM. The reference VM typically includes software like Patroni (for HA management), HAProxy (for internal load balancing), keepalived (for high availability IP management), and etcd (for distributed configuration). Since an external load balancer is used, the internal HAProxy can be omitted from the reference VM. NDB will rely on the external load balancer to distribute traffic, eliminating the need for HAProxy in the software profile, while the other components remain essential for cluster management.
* Option A (Patroni) is incorrect because Patroni is required for PostgreSQL HA management.
* Option B (HAProxy) is correct as it can be omitted when an external load balancer is configured.
* Option C (keepalived) is incorrect because keepalived is needed for HA IP failover.
* Option D (etcd) is incorrect because etcd is necessary for distributed configuration in the cluster.
This adjustment streamlines the profile for external load balancer use.
References
* Nutanix Database Service (NDB) User Guide, Chapter 4: Managing Software Profiles, Section:
Creating Software Profiles for HA Instances
* Nutanix Certified Professional - Database Automation (NCP-DB) v6.5 Blueprint, Section 4: Manage Database Software Profiles

208. Frage
Era allows custom metadata to be assigned to entities (clones, time machines, databases, and database servers) by using which component?

A. Tags
B. Text
C. Index
D. Notes

Antwort: A

Begründung:
Nutanix Era allows custom metadata to be assigned to entities (clones, time machines, databases, and database servers) by using Tags. Tags are a component of Nutanix Era that allows users to assign custom metadata to various entities, enhancing the ability to organize, search, and manage these entities within the Era platform1.

209. Frage
How does NDB send notifications when alerts are generated?

A. Email
B. APIs
C. SNMP
D. Pulse

Antwort: A

Begründung:
NDB sends notifications when alerts are generated via email. The email notifications can be configured to send to one or more recipients, and can be customized to include the alert severity, category, description, and resolution steps. The email notifications help to inform the database administrator and other stakeholders about the status and issues of the NDB-managed databases and operations.
NDB does not send notifications via SNMP, APIs, or Pulse. SNMP is a protocol for collecting and organizing information about managed devices on a network. APIs are interfaces for communicating and exchanging data between different applications or systems. Pulse is a feature of the Nutanix cluster that collects and sends diagnostic and usage data to Nutanix for analysis and support.
References:
* Nutanix Database Management & Automation Training Course, Module 3: Nutanix Era Deployment,
* Lesson 3.2: Nutanix Era Deployment, slide 11.
* Nutanix Database Management & Automation Training Course, Module 5: Nutanix Era Operations, Lesson 5.1: Nutanix Era Operations, slide 6.
* Nutanix Database Management & Automation Training Course, Module 5: Nutanix Era Operations, Lesson 5.2: Nutanix Era Alerts and Notifications, slides 5-7.

210. Frage
An administrator originally configured the storage for an Oracle database running on Nutanix NDB using ASMLib. The administrator would like to scale the size of the database.
What should the administrator do to most efficiently increase the size of the database?

A. Extend the size by adding new vDisks.
B. Leverage the scaling ability built into NDB to resize existing vDisks.
C. Create a new. larger database and migrate.
D. Mount an iSCSI LUN and extend the database onto the new LUN.

Antwort: B

Begründung:
When an administrator needs to scale the size of an Oracle database running on Nutanix NDB and originally configured using ASMLib (Automatic Storage Management Library), the most efficient approach is to use NDB's built-in scaling ability to resize existing vDisks. NDB supports dynamic resizing of virtual disks (vDisks) associated with database VMs, allowing the administrator to increase storage capacity without disrupting the database or requiring complex migrations. This method leverages Nutanix's storage integration, resizing the underlying vDisks and updating the ASMLib configuration to reflect the new size, ensuring seamless operation.
* Option A (Leverage the scaling ability built into NDB to resize existing vDisks) is correct as it is the most efficient, native NDB feature for scaling storage.
* Option B (Extend the size by adding new vDisks) is incorrect because adding new vDisks requires additional configuration (e.g., ASM disk group adjustments), making it less efficient than resizing.
* Option C (Create a new, larger database and migrate) is incorrect because migration is time- consuming and unnecessary when resizing is supported.
* Option D (Mount an iSCSI LUN and extend the database onto the new LUN) is incorrect because iSCSI LUNs are not the preferred method in NDB, and resizing vDisks is more integrated.
This approach minimizes downtime and complexity.
References
* Nutanix Database Service (NDB) User Guide, Chapter 4: Managing Database Servers, Section: Scaling Storage for Databases
* Nutanix Support & Insights, Knowledge Base Article: "Resizing vDisks for Oracle Databases in NDB"
* Nutanix Certified Professional - Database Automation (NCP-DB) v6.5 Blueprint, Section 4: Manage Database Servers

211. Frage
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