Nutanix NCS-CORE Online Practice Questions and Exam Preparation

Nutanix NCS-CORE Online Questions & Answers

• Question 121:

  A customer has an ESXi Cluster with two 10GbE NICs on each node with the following requirements:

  1.

  Solution must follow Nutanix Best Practices

  2.

  Network configuration should be redundant

  3.

  A vSphere Standard Switch must be utilized

  Which load balancing method should be used?

  A. Route based on originating port ID
  B. Route based on physical NIC load
  C. Route based on IP hash
  D. Route based on source MAC hash
  A. Route based on originating port ID

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  Explanation/Reference:

  According to Nutanix best practices for ESXi clusters, using a vSphere Standard Switch with "Route based on originating port ID" is recommended for load balancing. This method ensures that the same virtual port ID within a vSwitch uses the same uplink from the vSwitch. This load balancing policy provides an even distribution of traffic and redundancy by utilizing both NICs effectively without requiring any specific physical switch configurations, such as EtherChannel or LACP.References: The Nutanix Bible, NCS-Core 6.8 course content, and VMware's documentation on vSphere Standard Switch load balancing methods.

• Question 122:

  An administrator is implementing a VDI solution. The workload will be a series of persistent desktops in a dedicated storage container within a four-node cluster. Storage optimizations should be set on the dedicated storage container to give optimal performance including during a node failure event.

  Which storage optimizations should the administrator set to meet the requirements?

  A. Compression, Deduplication, and Erasure Coding
  B. Deduplication and Erasure Coding
  C. Compression and Deduplication
  D. Compression only
  B. Deduplication and Erasure Coding

• Question 123:

  Which container advanced setting should be configured to prevent ISO container images from exceeding a 100GB limit.

  A. Reserved capacity
  B. Advertised capacity
  C. Erasure coding
  D. Compression
  B. Advertised capacity

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  Explanation/Reference:

  The correct container advanced setting to configure in order to prevent ISO container images from exceeding a 100GB limit is "Advertised Capacity." This setting allows administrators to set a maximum storage capacity that is visible and available to the user, irrespective of the actual physical capacity available, thereby preventing over-allocation and management issues in environments where strict capacity limits are required.

  References: Nutanix Certified Services - Core (NCS-Core) Learning Documents Nutanix Bible: https://www.nutanixbible.com

• Question 124:

  A consultant finishes creating a new ESXi cluster. The consultant connects to the nodes via laptop and a personal flat switch. The host/CVM network is on VLAN 23. The customer has the native VLAN on the ToR switches set to 23.

  The customer wants to use LACP. Before placing the nodes on the customer network, the consultant tags VLAN 23 for each host and CVM. The consultant connects the nodes to the customer network and finds that they are unreachable.

  What is causing this issue?

  A. The customer has LACP fallback enabled on switch ports.
  B. The hosts have not been migrated to a vSphere Distributed Switch.
  C. Under the vSwitch0 settings, the consultant did not select Route based on IP hash.
  D. The host and CVM are incorrectly configured.
  C. Under the vSwitch0 settings, the consultant did not select Route based on IP hash.

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  Explanation/Reference:

  In this scenario, the connectivity issue arises because the VLAN settings require a specific configuration on the vSwitch settings when using LACP. When using LACP for load balancing network traffic, the vSwitch or Distributed Switch must be configured with the "Route based on IP hash" load balancing algorithm. This setting is necessary to properly distribute the traffic across the LACP bonded links. Not selecting this setting in vSwitch0 settings would result in improper handling of network packets over the LACP bonded links, thereby causing the hosts and CVMs to be unreachable. Adjusting the vSwitch settings to "Route based on IP hash" should resolve the connectivity issue.References: VMware vSphere Networking documentation, Nutanix Bible LACP configuration guidelines.

• Question 125:

  An administrator is deploying Nutanix Files 3.5 and needs to configure the sizing of the FSVMs for an increased number of concurrent SMB connections over the default 750. What should the administrator do?

  A. Deploy the Files VMs. power down the three FSVMs. change the CPU and RAM via Prism, and then power the three FSVMs back up
  B. During installation, click Customize on the File Server Installation screen, change the number of connections, and finish the installation
  C. Complete the default installation change the CPU and RAM m Prism, and then log into the File Server dashboard and change the Filer Server Properties
  D. During installation, input the correct number of connections in the File Server Installation screen and complete the installation
  B. During installation, click Customize on the File Server Installation screen, change the number of connections, and finish the installation

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  Explanation/Reference:

  Ref: https://portal.nutanix.com/page/documents/details?targetId=Files-v3_6:fil-file-server-manage-c.html

• Question 126:

  A consultant completes a new cluster installation and tries to update the firmware using LCM. The update fails with the following:

  operation failed, Reason: Failed to run LCM operation, error: ReadError('not a grip file',).

  Which log should the consultant view to get more info?

  A. genesis.out
  B. zookeeper.out
  C. janus.out
  D. athena.out
  A. genesis.out

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  Explanation/Reference:

  The error encountered during the LCM operation suggests a failure in reading a file, which might be linked to the foundational services of the cluster. The genesis.out log file is essential for troubleshooting issues related to cluster initialization

  and fundamental operations. This file logs the activities of the Genesis service, which is responsible for managing and monitoring the lifecycle of cluster services, including LCM tasks. In case of errors during LCM operations, the genesis.out

  log provides detailed insight into what might have gone wrong during the process, making it the appropriate log to check in this scenario.

  References:

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

  Nutanix University Videos on LCM and Genesis service: Nutanix Official YouTube Playlist

• Question 127:

  A consultant is setting up a new Hyper-V cluster. The customer requirements are as follows:

  1.

  VMs should automatically failover to another host if the host crashes

  2.

  Host CPU and Memory resources should be evenly balanced

  3.

  New VMs should be placed on the host with the most resources available

  Which two Hyper-V features can be used to meet the requirements? (Choose two.)

  A. Performance Resource Optimization
  B. Failover Clustering
  C. High Availability
  D. Distributed Resource Scheduler
  B. Failover Clustering
  C. High Availability

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  Explanation/Reference:

  The customer's requirements for automatic failover and resource balancing in a new Hyper-V cluster can be met with the use of Failover Clustering and High Availability. Failover Clustering allows VMs to automatically failover to another host in the event of a host failure, fulfilling the requirement for resilience. High Availability ensures that VMs restart on available hardware in the cluster, maintaining service continuity and balancing CPU and memory resources across the hosts.References: Microsoft Hyper-V documentation, Nutanix Bible, and NCS-Core 6.8 course materials on virtualization platforms.

• Question 128:

  A consultant is working to setup the network before starting the Foundation process.

  How should the consultant complete this task?

  A. Using the shared IPMI port, ensure that the connected switch can auto-negotiate to 1 Gbps.
  B. Disable IPv6 on the network to which the nodes are connected to ensure that IPv6 unicast is blocked.
  C. Ensure the IPMI of the nodes are reachable using pre-configured IPMI IPv6 addresses.
  D. On Nutanix NX Series, connect the IPMI port and any one of the data ports to the switch.
  D. On Nutanix NX Series, connect the IPMI port and any one of the data ports to the switch.

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  Explanation/Reference:

  Before starting the Foundation process, the consultant should prepare the network by:

  On Nutanix NX Series, connect the IPMI port and any one of the data ports to the switch: This ensures that the IPMI (for management and remote access) and at least one data port (for cluster communication and data traffic) are connected

  and operational, facilitating a smooth foundation process.

  References:

  Nutanix Bible (https://www.nutanixbible.com), especially sections on initial hardware setup and network preparations.

  Nutanix Hardware Setup Guide from Nutanix University (https://university.nutanix.com), detailing the specific steps for networking configurations during initial setup.

• Question 129:

  A consultant deploys a new ESXi-based Nutanix cluster and migrates a sphere deployment to the cluster, After completing the deployment, the customer states they are experiencing VM performance issues.

  Upon observing logs and performance data, the consultant identified the following symptoms.

  Excessive read/write 1/Os on CVMs

  Excessive Motion of VMs What is causing this issue?

  A. Sphere cluster DRS migration threshold is set to Conservative.
  B. DRS is in use and the cluster is configured to use Erasure Coding.
  C. DRS is in use and the cluster is configured to use Deduplication.
  D. Sphere cluster DRS migration threshold is set to Aggressive
  D. Sphere cluster DRS migration threshold is set to Aggressive

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  Explanation/Reference:

  The customer is experiencing VM performance issues characterized by excessive read/write I/Os on CVMs and excessive motion of VMs due to the Distributed Resource Scheduler (DRS) in an ESXi-based Nutanix cluster. This is likely caused by the DRS migration threshold being set to Aggressive, which leads to frequent rebalancing of workloads across the cluster, causing high I/O and VM motion. Adjusting this setting to a less aggressive level can help reduce unnecessary VM motions and stabilize performance. References: Nutanix Bible, Nutanix University NCS-Core 6.8 learning materials

• Question 130:

  An administrator is using Nutanix Move to migrate a Windows VM from ESXi to AHV. Automated guest preparation is failing with an error:

  Account has UAC enabled error

  The administrator is using the local built-in administrator account for the Windows VM Admin approval mode must remain enabled.

  What should the administrator do to continue with the migration with Nutanix Move?

  A. Use a Domain Admin account for the Windows VM
  B. Reboot the Windows VM and try the migration again
  C. Follow manual VM preparation guidelines
  D. Place Windows VM in Maintenance Mode
  C. Follow manual VM preparation guidelines

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  Explanation/Reference:

  https://next.nutanix.com/move-application-migration-19/nutanix-xtract-validation-failed-user-must-belong-in-a-group-with-restore-files-and-directories-security-policy-31303