Nutanix NCS-CORE Online Practice Questions and Exam Preparation

Nutanix NCS-CORE Online Questions & Answers

• Question 241:

  At which prompt should a consultant execute the command nanage_ovs --bridge_nawe brO show_uplinks in a Nutanix cluster?

  A. nutanix@CVM-$
  B. rootOcvM-t
  C. esxiOcvM'S
  D. rootQAHV-J#
  A. nutanix@CVM-$

  ---

  Explanation/Reference:

  To execute the command manage_ovs --bridge_name br0 show_uplinks in a Nutanix cluster, the appropriate prompt is:

  nutanix@CVM-$: This command is intended for execution within the Controller Virtual Machine (CVM) environment, and "nutanix@CVM-$" is the standard user prompt in the CVM where such network commands are run.

  References:

  Nutanix Bible (https://www.nutanixbible.com), especially sections on managing virtual bridges and networking commands.

  Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com), which includes details on command-line operations within the CVM.

• Question 242:

  A customer has HE servers with DiscoverOS and wants to install a Nutanix cluster.

  Which method should a consultant use to meet the requirements?

  A. Manually create the cluster.
  B. Create the cluster using CVM Foundation.
  C. Image the bare metal nodes.
  D. Create the cluster using Crash cart.
  C. Image the bare metal nodes.

  ---

  Explanation/Reference:

  When installing a Nutanix cluster on hardware servers pre-loaded with an existing operating system such as DiscoverOS, the best approach is to re-image the bare metal nodes. This process involves using the Nutanix Foundation tool to

  install the required Nutanix software (such as AOS and Hypervisor) onto the nodes, replacing any pre-existing software. This ensures that the hardware is properly configured and optimized for the Nutanix environment.

  References:

  Nutanix University - NCS-Core 6.8 Learning Path

  The Nutanix Bible, Foundation chapter (https://www.nutanixbible.com/)

• Question 243:

  After deploying an AHV cluster connected to Cisco Nexus 9k switches, unexpected network behavior is observed. The consultant needs to rule out physical network mis-cabling without returning to the datacenter.

  Which command from the host should the consultant run?

  A. show lldp neighbors
  B. show cdp neighbors
  C. show interfaces
  D. lldpctl
  D. lldpctl

  ---

  Explanation/Reference:

  To troubleshoot physical network mis-cabling without physical access to the data center and connected to Cisco Nexus 9k switches, the appropriate command to run from the Nutanix AHV host is lldpctl. This command allows the consultant to view the Link Layer Discovery Protocol (LLDP) information about directly connected devices. LLDP is supported on Nexus switches and provides detailed network topology information, which is crucial for identifying how the AHV nodes are connected to the switches, and to verify correct physical connections.References: Nutanix Command Reference Guide, Cisco Nexus 9000 Series documentation.

• Question 244:

  Before deploying a new 3-node cluster, a consultant wants to know which VLAN ID to use during Foundation. Where can the consultant find this information?

  A. Nutanix Portal
  B. As-Built Guide
  C. Deployment Questionnaire
  D. Test Plan
  C. Deployment Questionnaire

  ---

  Explanation/Reference:

  To find the correct VLAN ID to use during the Foundation of a new 3-node cluster, the consultant should refer to the:

  Deployment Questionnaire: This document typically contains detailed pre-engagement information gathered from the customer, including network specifications such as VLAN IDs. It provides the necessary context and configurations needed

  for a successful deployment.

  References:

  Nutanix Bible (https://www.nutanixbible.com), where the importance of pre-deployment planning and documentation is highlighted. Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com), which covers the process of

  gathering and using deployment information.

• Question 245:

  During Foundation, all nodes are imaged successfully. The cluster creation step fails. The consultant troubleshoots the issue and verifies that all Hosts and CVMs are up and running and responding to network pings.

  Which method should the consultant select to create the cluster?

  A. Log into one of the hosts and run the cluster create command.
  B. Image the Bare Metal nodes.
  C. Log into one of the CVMs and run the cluster create command.
  D. Factory reset the nodes and re-start the Foundation process.
  C. Log into one of the CVMs and run the cluster create command.

  ---

  Explanation/Reference:

  After confirming that all nodes (Hosts and CVMs) are operational and network accessible, the next step in troubleshooting a failed cluster creation process is to use one of the CVMs to manually initiate the cluster creation. This is done using

  the command cluster create from a CVM, which allows you to establish the cluster management and data services provided by Nutanix. This approach is recommended when the Foundation process has successfully imaged the nodes but the

  automatic cluster creation has failed.

  References:

  Nutanix University - NCS-Core 6.8 Learning Path

  The Nutanix Bible, Cluster Initialization chapter (https://www.nutanixbible.com/)

• Question 246:

  A customer would like to re-image an existing cluster. The Foundation Applet and Foundation VM is unavailable to them. How can the consultant access Foundation-as-a-Service (FaaS)?

  A. Through :9443
  B. Through :8000
  C. Through :9443
  D. Through :8000
  C. Through :9443

  ---

  Explanation/Reference:

  If a customer needs to re-image an existing cluster and both the Foundation Applet and Foundation VM are unavailable, the consultant can access Foundation-as-a-Service (FaaS) through the CVM IP address followed by port 9443, as indicated in Option C. FaaS allows for the re-imaging of Nutanix nodes through a web interface hosted directly on the CVM, making it an effective tool for deploying and managing clusters without needing additional installation media or virtual machines.References: Nutanix Foundation as a Service (FaaS) Documentation, Nutanix Support Portal.

• Question 247:

  A consultant is preparing for a cluster deployment and evaluates portable Foundation. Laptop configuration is as follows:

  1.

  CPU: 2.8 GHz Quad-Core Intel Core i7

  2.

  Memory: 4GB RAM

  During the installation, the consultant encounters some errors and tries to troubleshoot.

  What could prevent successful installation and Foundation usage?

  A. Gatekeeper must be enabled
  B. Oracle VirtualBox is installed on the laptop
  C. Laptop configuration does not meet installation requirements
  D. Firewall Stealth Mode is disabled
  C. Laptop configuration does not meet installation requirements

  ---

  Explanation/Reference:

  The likely reason for encountering errors during the installation and use of the portable Foundation tool on the laptop described is:

  Laptop configuration does not meet installation requirements:

  The Foundation tool, being a resource-intensive application, typically requires more than 4GB RAM to function efficiently, especially when deploying larger or more complex environments.

  References:

  Nutanix Bible (https://www.nutanixbible.com), especially sections on Foundation requirements.

  Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com), which includes specifications for hardware requirements for deployment tools.

• Question 248:

  Refer to the exhibit.

  

  An administrator has an existing cluster and needs to improve performance using AHV Turbo. Which two items are required to achieve even greater performance? (Choose two.)

  A. Workloads are multi-threaded.
  B. VMs have one vCPU configured.
  C. VMs have multi-queue disabled.
  D. VMs have more than one vCPU.
  A. Workloads are multi-threaded.
  D. VMs have more than one vCPU.

  ---

  Explanation/Reference:

  To maximize the performance benefits of AHV Turbo, which is designed to optimize network and storage I/O operations for VMs, certain VM configurations are advantageous. The correct answers are:

  Option A, "Workloads are multi-threaded." Multi-threaded applications can better utilize the improvements in I/O processing efficiency provided by AHV Turbo, leading to better overall performance. Option D, "VMs have more than one vCPU." This configuration allows VMs to handle multiple processes or threads simultaneously, which is particularly beneficial when combined with AHV Turbo's enhanced I/O operations.

  References:The benefits of configuring VMs with multiple vCPUs and supporting multi-threaded applications are discussed in Nutanix's documentation on AHV and performance optimization, where AHV Turbo is highlighted for its ability to accelerate VM operations in a Nutanix environment.

• Question 249:

  While reviewing the BOM during the kickoff call, a consultant notices that there are six NX nodes and 12 SFP+ modules, but no fiber cables are listed.

  Which statement is correct regarding this scenario?

  A. Only copper cables, not fiber cables, are required for SFP* modules.
  B. The customer can use any fiber cable from existing network devices.
  C. Nutanix provides fiber cables based on the fiber channel ports on the server.
  D. The consultant should remind the customer that it is their responsibility to procure compatible fiber cables.
  D. The consultant should remind the customer that it is their responsibility to procure compatible fiber cables.

  ---

  Explanation/Reference:

  When deploying Nutanix hardware, it is essential to ensure that all necessary components are included in the Bill of Materials (BOM). In this case, the BOM includes SFP+ modules but lacks the fiber cables needed for connectivity. The SFP+

  modules indicate a requirement for fiber optic cables, and it's crucial for the consultant to ensure the client understands their responsibility to procure compatible cables. Nutanix typically does not provide fiber cables as these are considered

  network infrastructure components, which vary based on specific network requirements and setups.

  References:

  Nutanix University - NCS-Core 6.8 Learning Path

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

  Nutanix TechTalks and Learning Videos

  (https://www.youtube.com/playlist?list=PLAHgaS9IrJecs_AcQT3Y7vSsKT2mjz3Iu)

• Question 250:

  A consultant runs the Foundation Applet and discovers all the nodes. The consultant wants to use the latest version of Foundation for imaging for support purposes and to cover the latest hardware and software hypervisor support. What should the consultant do to upgrade Foundation on a node?

  A. Use crash cart and manually upgrade Foundation files on one node.
  B. Use latest version of Foundation to reimage all the nodes.
  C. Use the Foundation VM to upgrade Foundation on all nodes.
  D. Use the Foundation Applet to upgrade Foundation on a single node.
  C. Use the Foundation VM to upgrade Foundation on all nodes.

  ---

  Explanation/Reference:

  To ensure that the Foundation Applet is up-to-date across all nodes, the best approach is to use the Foundation VM. The Foundation VM allows consultants to manage and upgrade Foundation on all nodes centrally. This method avoids the necessity of manual upgrades on each node individually, thus ensuring a more efficient and error-free process, aligning with Nutanix's best practices for scalability and management of infrastructure.References: The Nutanix Bible, the Nutanix University's NCS-Core 6.8 materials, and official Nutanix documentation on the Foundation VM.

  To ensure the latest version of Foundation is used for imaging to support the latest hardware and software hypervisor configurations, the consultant should utilize the Foundation VM. This tool allows for upgrading the Foundation on all nodes simultaneously, ensuring consistency across the cluster. It streamlines the process by leveraging the existing Foundation infrastructure rather than requiring manual updates via a crash cart or the limited capabilities of the Foundation Applet for single node upgrades.

  References: Nutanix Foundation Documentation: https://portal.nutanix.com Nutanix Upgrade Guide: Nutanix Foundation Upgrade Process