Nutanix NCS-CORE Online Practice Questions and Exam Preparation

Nutanix NCS-CORE Online Questions & Answers

• Question 161:

  An administrator is managing multiple Windows and Linux VMs connected to Nutanix Volumes. The Linux VMs are experiencing intermittent connectivity issues. The Windows VMs do not experience the same issue. Which option should the administrator use to resolve this issue?

  A. Utilize Jumbo Frames
  B. Add additional disks to the Volume Group
  C. Set the SCSI timeout value to 60
  D. Utilize a separate subnet for the Linux VMs
  C. Set the SCSI timeout value to 60

  ---

  Explanation/Reference:

  Ref: https://kb.vmware.com/s/article/1009465

• Question 162:

  During a six-node cluster deployment, one node fails to image successfully and Foundation is unable to automatically configure the cluster. The consultant decides to manually complete cluster formation with the successful nodes, then expand the cluster with the remaining unconfigured node.

  Which command should be used to begin the process?

  A. cluster status
  B. cluster create
  C. cluster start
  D. cluster expand
  B. cluster create

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  Explanation/Reference:

  When deploying a multi-node Nutanix cluster, if one node fails to image and the Nutanix Foundation tool cannot configure the cluster automatically, the consultant can manually create the cluster with the nodes that were successfully imaged. The correct command to initiate this process is cluster create . This command starts the cluster services and allows for further expansion once the cluster is operational, which would include adding the node that initially failed to image.

  References:

  Nutanix Bible (https://www.nutanixbible.com), specifically the section on manual cluster creation.

  Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com), videos on manual cluster operations.

• Question 163:

  Refer to the exhibit.

  

  Which IP addresses can be configured for the Foundation VM and Consultant Laptop?

  A. FVM: 10.170.25.15/24, Laptop: 10.170.25.16/24
  B. FVM: 10.170.1.2/20, Laptop: 10.170.1.12/20
  C. FVM: 10.170.16.15/20: 10.170.16.16/20
  D. FVM: 10.170.25.2/24, Laptop: 10.170.25.12/24
  D. FVM: 10.170.25.2/24, Laptop: 10.170.25.12/24

  ---

  Explanation/Reference:

  Based on the subnet assignments from the exhibit provided, the Hypervisor Management IP addresses fall within the 10.170.0.5, 10.170.0.6, 10.170.0.7 range with a subnet mask of 255.255.240.0, indicating a /20 subnet. However, the Foundation VM (FVM) and the Consultant Laptop should ideally be on the same subnet as the Controller Virtual Machine (CVM) to facilitate easy access and management. The CVM IP addresses indicated are 10.170.0.4, 10.170.0.9, and

  10.170.0.10 with subnet 255.255.240.0 (/20). Thus, the appropriate choice for the FVM and Laptop that matches the subnet without overlapping with existing IPs and allows network configuration without conflicts would be in the same /24

  range as suggested in option D, i.e., FVM:

  10.170.25.2/24, Laptop: 10.170.25.12/24.

  References:

  Nutanix Networking and Foundation Setup Guidelines

• Question 164:

  A consultant is deploying a new Nutanix cluster. The nodes have the following network interfaces.

  1.

  2x 10G NICS

  2.

  2x 25G NICS

  The consultant is using the default virtual switch configurations for AHV. After creating 10 VMs, the consultant observes inconsistent network speeds from the VMs on the AHV host.

  What should the consultant do to resolve this issue?

  A. Configure load balancing on the virtual switch for both 106 and 25G interfaces.
  B. Configure a separate virtual switch with 10G NICs on vs o and 256 NICs on vs.
  C. Configure Active/Backup for both the 10G and 25G interfaces.
  D. Configure all network interfaces with LACP on the same virtual switch.
  D. Configure all network interfaces with LACP on the same virtual switch.

  ---

  Explanation/Reference:

  To resolve inconsistent network speeds from the VMs on an AHV host equipped with both 10G and 25G NICs, the consultant should configure all network interfaces with Link Aggregation Control Protocol (LACP) on the same virtual switch.

  This configuration will allow for better load balancing and bandwidth aggregation across multiple network interfaces, improving overall network throughput and reducing bottlenecks.

  References:

  Nutanix University - NCS-Core 6.8 Learning Path

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

• Question 165:

  A Nutanix cluster has 10TB usable storage. The customer wants to create a 100GB datastore for ISO images to eliminate too much storage being consumed by unnecessary images.

  Which setting should be used to accomplish this goal?

  A. From Container Advanced Settings, configure 100GB for advertised capacity.
  B. From Container Advanced Settings, enable erasure coding.
  C. From Container Advanced Settings, turn on compression and deduplication.
  D. From Container Advanced Settings, configure 100GB for reserved capacity.
  A. From Container Advanced Settings, configure 100GB for advertised capacity.

  ---

  Explanation/Reference:

  To limit a datastore to a specific capacity within a Nutanix cluster, the best approach is to configure the advertised capacity in the Container Advanced Settings. Setting the advertised capacity to 100GB ensures that this amount of storage is

  reported to external entities (like hypervisors or operating systems) as the total usable capacity of the datastore, effectively preventing the storage of additional data beyond this limit. This method is preferred over reserving capacity, which

  guarantees space for specific uses but doesn't limit the total size visible to the system.

  References:

  Nutanix Bible (https://www.nutanixbible.com), specifically the section on storage container configuration.

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

• Question 166:

  A consultant installs a new AHV cluster and moves the cluster into the customer's environment. Alter the move, the consultants notice that traffic is not being balanced across the physical NICs. The ToR switches have been configured with LACP.

  Within Prism Element, which AHV network option should be set to resolve the issue?

  A. Active-Backup
  B. Active-Active
  C. No Uplink Bond
  D. Active-Active with MAC Pinning
  B. Active-Active

  ---

  Explanation/Reference:

  In a situation where traffic is not being balanced across the physical NICs and the Top-of-Rack (ToR) switches have been configured with LACP (Link Aggregation Control Protocol), the appropriate AHV network configuration to resolve this

  issue within Prism Element is "Active-Active." This setting enables both NICs to actively handle traffic, which, combined with LACP, allows for load balancing and redundancy, effectively utilizing all available network paths. This setup ensures

  that traffic is spread evenly across the physical NICs, maximizing network throughput and resilience.

  References:

  Nutanix Community: AHV Networking | Enable, Disable and Verify LACP1

  Nutanix Support and Insights: Layer 2 Network Management2

  Nutanix Support and Insights: Enabling LAG and LACP on the ToR Switch (AHV Only)

• Question 167:

  During the Foundation imaging process, nodes are successfully imaged, but the cluster creation fails.

  Which log should the consultant review to determine the cause?

  A. service.log
  B. foundation.out
  C. first_boot.log
  D. genesis.out
  B. foundation.out

  ---

  Explanation/Reference:

  During the Nutanix Foundation process, if imaging succeeds but cluster creation fails, the foundation.out log is the primary resource for investigating issues related to cluster creation. This log file contains detailed information about the steps

  undertaken by the Foundation process, including any errors or issues encountered during the cluster creation phase, making it invaluable for diagnosing problems that prevent successful cluster configuration.

  References:

  Nutanix Bible (https://www.nutanixbible.com), particularly the sections on troubleshooting with logs.

  Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com), where log file analysis is discussed in the context of deployment troubleshooting.

• Question 168:

  To prepare for a new Nutanix installation, a consultant downloads the Foundation VM, imports the VM to their Desktop Virtualization Solution, and powers on the VM. The IPv4 static address on the host workstation and the Foundation VM have been configured, but pings between them fail.

  Which two troubleshooting steps should the consultant perform? (Choose two.)

  A. Remove and re-import the Foundation VM to ensure the virtual NIC is set to Host-Only.
  B. Verify the virtual NIC in the Foundation VM is bound to the correct physical Host adapter.
  C. Confirm the IP addresses and subnet masks are correct.
  D. Verify the virtual NIC in the Foundation VM is bound to the correct wireless network adapter.
  A. Remove and re-import the Foundation VM to ensure the virtual NIC is set to Host-Only.
  C. Confirm the IP addresses and subnet masks are correct.

  ---

  Explanation/Reference:

  When facing connectivity issues between the host workstation and the Foundation VM, ensuring proper network configuration is crucial. Removing and re-importing the Foundation VM can help reset any configuration issues, particularly ensuring that the virtual NIC is set to the correct mode, such as Host-Only, to facilitate direct communication with the host. Confirming the IP addresses and subnet masks ensures that both the host and the VM are on the same network segment, which is essential for successful communication. This step verifies that there are no IP configuration errors causing the connectivity issue.

  References: Nutanix Bible: Foundation VM Setup and Configuration Nutanix University: Foundation VM Networking Configuration

• Question 169:

  In preparing to install a new cluster for a company, a consultant needs to complete an installation worksheet.

  Which values must be documented prior to initial base system setup?

  A. Block Serial Numbers
  B. Hypervisor, CVM, and IPMI IP Addresses
  C. DNS and NTP IP Addresses
  D. Prism Central IP Address
  C. DNS and NTP IP Addresses

  ---

  Explanation/Reference:

  Prior to the initial base system setup for a new cluster installation, the consultant needs to document several critical infrastructure details. Among the most important are the DNS and NTP IP addresses (C). These addresses are crucial because they ensure that all nodes within the cluster can resolve domain names properly and synchronize their clocks accurately, which is vital for cluster operations and management. Proper DNS and NTP configurations help prevent many common issues related to name resolution and time synchronization that could affect the performance and stability of the cluster.References: Nutanix Installation Prep Guide, Nutanix Network Configuration Requirements.

• Question 170:

  A customer has a primary datacenter with 12 Nutanix blocks distributed across three racks. The customer wants to achieve the most resiliency possible. They also have a datacenter in a branch office that is 400 kilometers away from the primary datacenter.

  Which two solutions should be used? (Choose two.)

  A. Time Stream to a remote site
  B. Async DR to a remote site
  C. Rack awareness
  D. Block awareness
  B. Async DR to a remote site
  C. Rack awareness

  ---

  Explanation/Reference:

  For a customer with 12 Nutanix blocks distributed across three racks and an additional datacenter 400 kilometers away, achieving the highest level of resiliency involves ensuring both local and remote data protection.

  Option B, "Async DR to a remote site," is essential for protecting against site failures by asynchronously replicating data to a branch office. This method is suitable for long-distance replication where latency and bandwidth are concerns.

  Option C, "Rack awareness," is crucial in a multi-rack setup to ensure that data is distributed in such a way that a failure of a single rack does not lead to data loss or significant downtime. Rack awareness configures the placement of data replicas across different racks, improving fault tolerance within the primary datacenter.

  References:Nutanix documentation on disaster recovery and data resilience strategies, such as those found in the Nutanix Bible and official Nutanix training materials, supports these recommendations, emphasizing the importance of both remote site replication and local redundancy configurations.