Nutanix NCS-CORE Online Practice Questions and Exam Preparation

Nutanix NCS-CORE Online Questions & Answers

• Question 101:

  A consultant successfully completes a Foundation using a flat switch. The consultant then works with the customer to move the cluster over to their production network. After the move, the CVMs and hypervisors can no longer communicate, which prevents the cluster from starting.

  Which option should be used to resolve this issue?

  A. If the IPMI is in use, check that the IPMI can ping the default gateway over IPv6.
  B. Make sure that the IPMI and CVM VLAN is manually tagged on the Host and CVM.
  C. Verify that IPv6 Link Local and DHCP is enabled on all switch ports.
  D. If using VLANs, confirm the hypervisor/CVM VLAN is set as Native on the switch ports.
  D. If using VLANs, confirm the hypervisor/CVM VLAN is set as Native on the switch ports.

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  Explanation/Reference:

  The inability of CVMs and hypervisors to communicate after moving a cluster to the production network typically points to a VLAN configuration issue. The correct action is to confirm that the VLAN designated for hypervisor/CVM communication is set as the Native VLAN on the switch ports to which the nodes are connected. This setting ensures that traffic from these VLANs is properly prioritized and handled by the network, thereby restoring communication between CVMs and hypervisors and allowing the cluster to start.References: Nutanix Bible, NCS-Core 6.8 official documentation on networking configurations, and troubleshooting VLAN issues.

• Question 102:

  A consultant is working with a customer on a new cluster deployment.

  While reviewing the customer questionnaire, the consultant notices that the customer has documented their DNS servers as follows:

  1.

  CompanyDNSI 192.168.5.10

  2.

  CompanyDNS2 192.1685.20

  What should the consultant consider regarding this deployment?

  A. Everything has been accounted for to ensure a successful deployment.
  B. Internal Nutanix networking will interfere with the installation's ability to complete.
  C. During deployment, the CVMs should be configured to use a separate network.
  D. New IP's provided should be verified to not conflict with the customers network.
  D. New IP's provided should be verified to not conflict with the customers network.

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  Explanation/Reference:

  Noticing a potential typo or error in the DNS server IP address notation:

  New IPs provided should be verified to not conflict with the customer's network: It's crucial to verify the accuracy and validity of the IP addresses provided, ensuring there are no typos and that the IPs do not conflict with existing network

  configurations. The noted IP '192.1685.20' appears to be incorrectly formatted and should be corrected and validated.

  References:

  Nutanix Bible (https://www.nutanixbible.com), where network preparation and IP address configuration are covered.

  Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com), which discusses network planning and verification in cluster deployments.

• Question 103:

  An administrator is deploying an application that requires maximum I/O throughput for scratch data. The administrator is concerned that the throughput requirement is greater than what can be provided by a single cluster node.

  What should the administrator do to meet this requirement?

  A. Create a volume group with several virtual disks and attach to the VM
  B. Create a volume group with one virtual disk attached to the VM
  C. Create a virtual disk attached to the VM's PCI interface
  D. Create several virtual disks attached to the VM's virtual SCSI controller
  A. Create a volume group with several virtual disks and attach to the VM

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  Explanation/Reference:

  https://next.nutanix.com/community-blog-40/scaling-up-vm-storage-performance-on-ahv-volume-group-load-balancer-28063

• Question 104:

  A systems administrator needs to add more VMs to their Nutanix cluster.

  Which two actions should the administrator perform to determine if the current cluster can accommodate the new VMs? (Choose two.)

  A. Perform an Inventory with Life Cycle Management.
  B. Determine utilization with Cluster Runway.
  C. Enable Deduplication and Erasure Coding.
  D. Utilize Optimize Resources for VM efficiency.
  B. Determine utilization with Cluster Runway.
  D. Utilize Optimize Resources for VM efficiency.

• Question 105:

  An administrator deploys Exchange on a Nutanix cluster. The administrator creates two containers with RF2 configuration:

  1.

  One container for Exchange

  2.

  One container for the other VMs

  The Exchange VM is experiencing I/O performance issues.

  Which changes to Storage Optimization should be used on the Exchange container to enhance I/O performance?

  A. No data reduction
  B. Post process Deduplication only
  C. Inline compression and EC-X
  D. Inline compression and Deduplication
  A. No data reduction

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  Explanation/Reference:

  For the Exchange VM experiencing I/O performance issues, the recommended storage optimization change is Option A, "No data reduction." Exchange, as an application, is highly sensitive to latency and typically does not benefit significantly from data reduction technologies like deduplication or compression, which can introduce additional processing overhead and potentially worsen performance issues.

  By configuring the container for Exchange with no data reduction, the system maximizes I/O performance by eliminating any additional processing that could delay data access. This setup ensures that Exchange has the fastest possible access to its data, which is crucial for its performance.

  References:This recommendation aligns with best practices for Exchange storage on Nutanix, as detailed in the Nutanix best practices guide for deploying Microsoft Exchange, where it advises against using data reduction features for databases requiring high I/O throughput.

• Question 106:

  During the cluster deployment, a consultant conducts operational tests on a vCenter-managed ESXi hypervisor.

  As a part of tests, vCenter must place the host into maintenance mode, however, the task is stuck and the CVM is not shutting down automatically.

  What should the consultant do to resolve the issue?

  A. Shutdown the CVM using cvn_shutdown -P now.
  B. Put the node into maintenance mode using
  C. acli host.enter_maintenance_mode Hypervisor address.
  D. Put the node into maintenance mode using '-/serviceability/bin/esx-shutdown -s cwn_. _addr
  E. Shutdown the CVM using shutdown -h now.
  E. Shutdown the CVM using shutdown -h now.

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  Explanation/Reference:

  When a task to place an ESXi host into maintenance mode is stuck and the CVM (Controller Virtual Machine) is not shutting down automatically, the consultant should manually shut down the CVM. The command shutdown -h now is used to halt the system safely. Before executing this command, it is important to ensure that all virtual machines hosted on the CVM have been properly shut down or migrated to avoid any data loss or corruption.

  References: Nutanix Community: CVM maintenance and Host maintenance1 Nutanix Support and Insights documentation on Cluster Management Commands2 Nutanix Support and Insights on AHV Host Maintenance Mode3

• Question 107:

  The following alert appears on the file server alerts tab in the file server dashboard:

  File Server FS47-SS has multiple VMs on a single node

  Which two events can generate this alert? (choose two)

  A. A three-node duster hosting the file server is undergoing AOS upgrade.
  B. A node failed in a three-node cluster.
  C. A Nutanix file with four hie server VMs is deployed on a three-node duster.
  D. A node is set to the maintenance mode in a three node cluster.
  B. A node failed in a three-node cluster.
  D. A node is set to the maintenance mode in a three node cluster.

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  Explanation/Reference:

  An alert of this nature in the file server dashboard usually indicates issues related to node availability within a cluster. Specifically, the failure of a node in a three-node cluster (Option B) can lead to insufficient resources to handle all tasks, which might trigger such an alert. Additionally, setting a node to maintenance mode in a three-node cluster (Option D) also disrupts service availability and could generate a similar alert, as the remaining nodes might struggle to handle the load or maintain data redundancy.References: Nutanix AOS User Guide, Nutanix Files Documentation.

• Question 108:

  What must be set to enable node discovery when using Foundation VM?

  A. Host-only Adapter
  B. Bridged Adapter
  C. Network Address Translation
  D. Internet Access
  B. Bridged Adapter

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  Explanation/Reference:

  For enabling node discovery when using the Foundation VM, the network adapter of the Foundation VM must be set to a Bridged Adapter. This configuration allows the VM to appear as a separate device on the same physical network as the host machine, making it possible for the Foundation VM to communicate directly with the nodes that are also connected to the same network. This is essential for node discovery and subsequent imaging operations performed by the Foundation tool.References: Nutanix Foundation Guide, Nutanix Networking Best Practices.

• Question 109:

  A consultant is using the Foundation applet to create a cluster. During the process the consultant refreshes the progress bar web page and is concerned when nothing loads. What should the consultant do to verify that Foundation has completed successfully?

  A. Return to the Foundation configuration page and start over.
  B. Update Java on the Foundation VM.
  C. Connect to any CVM IP address from a web browser.
  D. Restart the Foundation process.
  C. Connect to any CVM IP address from a web browser.

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  Explanation/Reference:

  If the Foundation applet's progress bar webpage does not load after a refresh during a cluster creation, the consultant should verify if the Foundation process has completed by attempting to connect to any CVM (Controller Virtual Machine) IP

  address using a web browser. Accessing the CVM will confirm whether the nodes are operational and part of the cluster, thus indicating whether the Foundation process has successfully completed or not.References: Nutanix Bible, NCS-Core

  6.8 official documentation on the Foundation process.

• Question 110:

  A customer has engaged a Nutanix consultant to deploy a cluster consisting of two NX-3460-G6 blocks. The consultant arrives at the customer site and fines the following:

  1.

  One rack with a total of 5U available

  2.

  Two ToR switches with 14 total available ports

  3.

  Dual PDUs with six available sockets

  What will prevent the consultant from successfully installing the cluster?

  A. Insufficient sockets for power allocation. Rack space may not be continuous.
  B. Insufficient rack space for block installation. Insufficient sockets for power allocation.
  C. Insufficient network ports for communication. Insufficient sockets for power allocation.
  D. Insufficient network ports for communication. Insufficient sockets for power allocation.
  E. Insufficient network ports for communication. Rack space may not be continuous.
  B. Insufficient rack space for block installation. Insufficient sockets for power allocation.

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  Explanation/Reference:

  To determine the correct answer, you must evaluate the requirements for installing a Nutanix NX-3460-G6 block. Each block typically occupies 2U of rack space. Since the customer has two blocks, a total of 4U is required, which fits within the

  available 5U rack space. Additionally, each block requires two power sockets (one for each node in the block), totaling four sockets. Since there are six available sockets, there is enough power availability. Therefore, the primary constraints

  are adequately met in terms of rack space and power sockets. The mention of network ports and their sufficiency is not required here, as it isn't the limiting factor based on the details provided.

  References:

  Nutanix Bible (https://www.nutanixbible.com)

  Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com)

  Nutanix Deployment Guide

  Nutanix Hardware and Installation Guide