Nutanix NCS-Core Exam Questions Instant Access

Question 1

Refer to the exhibit.

A Nutanix host is connected as shown in the exhibit with br0-up set to active/backup. Physical Switch 1 experiences a power outage causing br0-up to failover to using eth2. The CVM and host become inaccessible. User VMs restart on other hosts in the cluster, which causes a disruption to those VMs.

Which configuration issue likely caused this outage?

ABridge br0-up should be configured to use balance-tcp rather than active/backup.

BThe CVM should have eth1 connected to the OVS.

CThe upstream port for eth2 is missing a VLAN.

DThe user VMs only have one NIC

Answer : C

Ref: https://portal.nutanix.com/page/documents/solutions/details?targetId=BP-2071-AHV-Networking:top_ahv_networking_best_practices.html

Question 2

An administrator is deploying several new application VMs to a Nutanix cluster. The application is very transactional with a 28/72 random, read/write ratio.

What should the administrator do?

AAdd a minimum of four SSDs to each node to ensure all writes go to the SSDs.

BAdd a minimum of four virtual disks to each VM, and aggregate them on guest OS level.

CAdd one large SSD to each node and enable Flash Mode for the VMs.

DAdd one large virtual disk to each VM. and use it for all application data.

Answer : B

Ref: https://next.nutanix.com/server-virtualization-27/iops-latency-issue-1168

Question 3

Refer to Exhibit:

A customer is preparing to expand a cluster with a consultant. The production cluster is comprised of one NX-3460-G7 and two NX-8235 G8 blocks. The running AOS version is 5.20.4.6 and Hypervisor version is ESXi 6.7 U3b. vCenter is also running a 6.7 version.

One NX-3235-G9 block will be added to that cluster (ESXI-NUTA-09 and ESXI-NUTA-10).

The consultant has verified Nutanix documentation and customer's As-Built guide:

* NX-3060-G7 and NX-8035-G8 are hybrid HCI nodes

* ESXi 6.7 U3b is unsupported for the new G9 hardware model

* AOS 5.20.X and ESXi 6 X are end of support

* NX-3060-G7 and NX-8035-G8 hypervisors can be upgraded to the latest ESXi supported version

What actions should be taken before beginning the cluster expansion?

AUpgrade vCenter, AOS and ESXi to supported and recommended versions.

BUpgrade only AOS and ESXi to supported and recommended versions.

CReplace all HDDs with SSDs on the Production cluster.

DPrepare Foundation and the whitelist. json file to deploy ESXi 6.7 U3b on the new nodes.

Answer : A

Before expanding the cluster with the new NX-3235-G9 block, it is critical to ensure that all components are running supported and recommended versions due to compatibility and support issues. Therefore, the necessary actions include: A. Upgrade vCenter, AOS, and ESXi to supported and recommended versions. This step ensures compatibility across all components, particularly important as the new G9 hardware does not support the currently installed version of ESXi. Upgrading these components will also ensure continued vendor support and the stability of the environment. Options B, C, and D do not adequately address the need for vCenter upgrades or the fact that ESXi 6.7 U3b is unsupported for G9, highlighting the necessity for a comprehensive upgrade. Reference: Nutanix Hardware Compatibility List, Nutanix Support Portal.

Question 4

The customer notices storage latency issues with their new Nutanix AHW cluster. The deployment includes the following components:

2 ToR switches

7 nodes

Which command should the consultant run to identify issues?

Amanage_ovs show bridges

Bmanage_ovs show_interfaces

Cmanage_ovs show_11dp

Dmanage_ovs show_uplinks

Answer : B

To troubleshoot storage latency issues in a Nutanix cluster, it is vital to examine the state and performance of the network interfaces. The command manage_ovs show_interfaces provides comprehensive details about each interface's status, including any errors or drops that could contribute to network-related latency. This information is crucial for identifying problematic nodes or interfaces that may be causing storage access delays. This command effectively presents the operational status of network interfaces, which can help pinpoint issues directly affecting storage performance.

Nutanix Command Reference Guide: https://portal.nutanix.com

Nutanix University Troubleshooting Network Issues: https://www.nutanix.com/support-services/training-certification

Question 5

A customer has a four-node cluster and is using Volume Groups to provide storage services to a SQL cluster.

In the event of a CVM failure in the cluster, what is the expected IO path of the volume group's iSCSI targets?

AvDisk directed at failure CVM are redirected to Data Services IP until CVM is reconnected

BvDisk directed to CVM that failed to disconnect and will not reconnect without manual intervention

CvDisk directed to failed CVM are redirected to another CVM and automatically reconnect

DvDisk directed at failed CVM will disconnect and reconnect when the failed CVM comes back online

Answer : C

In a Nutanix cluster, when a Controller Virtual Machine (CVM) fails, the iSCSI targets for the volume groups managed by that CVM are not left inoperable. Instead, the volume group's iSCSI targets (vDisks) are automatically redirected to another operational CVM in the cluster. This failover mechanism ensures that there is no interruption in service or data availability. The redirection is seamless and does not require manual intervention, allowing for continuous access to the volume group by the SQL cluster.

Nutanix Bible: Data Protection and High Availability

Nutanix University: Resiliency and Disaster Recovery

Question 6

A consultant attempts to perform an LCM inventory after successfully creating the cluster, but is met with the following error:

LCM Exception [LcmExceptionHandler]: Could not find a module for entity with reference name nutanix.ncc.update

What is the most likely reason LCM inventory/update is failing?

ANameservers are not reachable.

BIPMI network is unable to reach the internet.

CClusters must be licensed before LCM inventory.

DNutanix CVMs are blocking TCP port 54.

Answer : C

The error encountered during the LCM inventory process, which mentions 'Could not find a module for entity with reference name nutanix.ncc.update,' typically indicates that the cluster has not yet been licensed. The Life Cycle Management (LCM) functionality in Nutanix systems requires a valid license to perform operations such as inventory checks and updates. Without this license, LCM cannot retrieve or update the necessary software modules, leading to the stated error. Licensing the cluster would resolve this issue and allow the LCM processes to proceed normally. Reference: Nutanix LCM Documentation, Nutanix Licensing Guidelines.

Question 7

In a Nutanix cluster, a Protection Domain contains 50 entities that are replicated to a remote Single Node Replication Target.

The current schedule configuration is as follows:

* Repeat every 6 hours

* Local Retention Policy 1

* Remote Retention Policy 8

* Starting time 12 am

At 8 am on Monday, the administrator discovers that a protected VM is corrupted. The latest good state was Sunday 2 pm. The administrator needs to maintain current protection.

Which strategy should the administrator use to meet these requirements?

AFrom the Remote site, activate the Protection Domain, then re-protect the entity.

BFrom the Remote site, restore the VM from the local snapshot by selecting the correct snapshot

CFrom the local site, retrieve the correct remote snapshot, then restore the VM locally.

DFrom the local site, restore the VM from the local snapshot by selecting the correct snapshot.

Answer : C

Nutanix Certified Services Core Infrastructure Professional v6.8 NCS-Core Exam Questions