Nutanix NCS-CORE Online Practice Questions and Exam Preparation

Nutanix NCS-CORE Online Questions & Answers

• Question 41:

  A consultant is conducting a vSphere cluster deployment. As a part of operational tests, a vMotion operation is performed on a test VM, but fails with following error message:

  The VMotion failed because the ESX hosts were not able to connect over the VMotion network. Please check your VMotion network settings and physical network configuration.

  VMotion [184329483:1276605211167987] failed to create connection with remote host <10.10.16.14>: The ESX hosts failed to connect over the VMotion network Migration [184329483:1276605211167987] failed to connect to remote host <10.10.16.14>: Timeout

  What issue could prevent the vMotion operation from completing successfully?

  A. The vmknic is configured with a conflicting IP address.
  B. NIOC is enabled and vMotion traffic is configured with Share value SO.
  C. Foundation service prevents connectivity between the source and the destination TCP port 8000.
  D. The vSS is configured with Route based on originating virtual port.
  A. The vmknic is configured with a conflicting IP address.

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  Explanation/Reference:

  The failure of the vMotion operation indicated by the error message could most plausibly be caused by: A. The vmknic (VMkernel network interface card) configured with a conflicting IP address. This conflict can prevent the ESXi hosts from establishing a connection over the VMotion network, as each host must have a unique IP address on the VMotion network to facilitate proper migration communications. Option B, involving NIOC settings, and option D, involving vSS configuration, could influence performance but are less likely to cause a complete failure to connect. Option C, related to the Foundation service, is not relevant to vMotion networking issues directly. References: VMware vSphere Networking Documentation, Nutanix Integration with VMware Environments.

• Question 42:

  An administrator configure Active Directory (AD) authentication for their Nutanix environment. When login in using an AD user account, the login process takes more than one minute to complete. No delay occurs when logging a local account.

  What should the administrator confirm to resolve this issue?

  A. The user search base for the group is configured correctly
  B. The domain controller being used is configured as a global catalog server.
  C. Active directory lookups are configured to use Non-Recursive mode.
  D. The service Account Username is correct for the domain.
  C. Active directory lookups are configured to use Non-Recursive mode.

  ---

  Explanation/Reference:

  In a Nutanix environment, if the login process using an Active Directory (AD) user account takes more than a minute to complete, it could be due to the configuration of the AD lookups.

  Active Directory lookups can be configured to use either Recursive or Non-Recursive mode. In Recursive mode, the system will look up each group that a user is a member of, then each group that those groups are members of, and so on. This can lead to a large number of lookups and potentially slow down the login process1.

  On the other hand, in Non-Recursive mode, the system only looks up the direct groups that a user is a member of. This can significantly reduce the number of lookups and speed up the login process1.

  Therefore, the administrator should confirm that Active Directory lookups are configured to use Non-Recursive mode to resolve this issue.

  References: Active Directory Authentication is slow - Takes minutes to Logon | Nutanix Community Configuring Authentication | Nutanix Community Solving Slow Logon Issues in Active Directory Environments

• Question 43:

  A customer needs a DR solution designed around the following requirements:

  1.

  There are 8 ms of latency between Sites A and B

  2.

  The administrator needs the shortest RPO/RTO possible

  3.

  Application consistent snapshots are required

  4.

  Use of Nutanix VSS

  Which Data Protection Method should be used?

  A. Async
  B. Metro Availability
  C. Near Sync
  D. Cloud Connect
  C. Near Sync

  ---

  Explanation/Reference:

  https://portal.nutanix.com/page/documents/details?targetId=Prism-Element-Data-Protection-Guide-v5_18:wc-dr-application-consistent-snapshots-wc-r.html

• Question 44:

  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?

  A. Bridge br0-up should be configured to use balance-tcp rather than active/backup.
  B. The CVM should have eth1 connected to the OVS.
  C. The upstream port for eth2 is missing a VLAN.
  D. The user VMs only have one NIC
  C. The upstream port for eth2 is missing a VLAN.

  ---

  Explanation/Reference:

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

• Question 45:

  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?

  A. vDisk directed at failure CVM are redirected to Data Services IP until CVM is reconnected
  B. vDisk directed to CVM that failed to disconnect and will not reconnect without manual intervention
  C. vDisk directed to failed CVM are redirected to another CVM and automatically reconnect
  D. vDisk directed at failed CVM will disconnect and reconnect when the failed CVM comes back online
  C. vDisk directed to failed CVM are redirected to another CVM and automatically reconnect

  ---

  Explanation/Reference:

  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.

  References: Nutanix Bible: Data Protection and High Availability Nutanix University: Resiliency and Disaster Recovery

• Question 46:

  After reviewing the questionnaire provided by a customer, the consultant is completing the Foundation Configuration on the Nutanix website. According to the customer requirements, the cluster should be prepared off site in a safe room, and moved afterwards to the datacenter.

  Which configuration should the consultant implement on the Foundation VM?

  A. Add ?virtual switch dedicated to the IPMI network.
  B. Prepare multi-homing with two IP addresses.
  C. another physical laptop port to the Foundation VM.
  D. Create a firewall rule blocking customer subnets.
  A. Add ?virtual switch dedicated to the IPMI network.

  ---

  Explanation/Reference:

  When preparing the cluster offsite in a safe room, the consultant should ensure that the Foundation VM is correctly configured to handle IPMI networking. Implementing a virtual switch dedicated to the IPMI network within the Foundation VM environment ensures that there is a segregated and controlled network path for IPMI traffic, which is crucial for initial hardware configuration and management. This setup facilitates the secure and efficient foundation process before the cluster is moved to the data center.References: Nutanix Foundation Tool Guide, Nutanix Network Configuration Best Practices.

• Question 47:

  An administrator is updating disk firmware using LCM and receives the following message:

  "there have been 10 or more cluster services restarts within 15 minutes in the Controller VM"

  The message appears as each drive is upgraded.

  What is the reason this message is being generated?

  A. A node has been rebalanced
  B. A drive has been reformatted
  C. A node has been rebooted
  D. A drive has been ejected
  C. A node has been rebooted

  ---

  Explanation/Reference:

  Ref: https://portal.nutanix.com/page/documents/kbs/details?targetId=kA032000000TT8DCAW

• Question 48:

  Which Nutanix tool does the Field Installation Guide provide instructions for?

  A. Prism Central
  B. Foundation
  C. As-Built Generator
  D. Nutanix Move
  B. Foundation

  ---

  Explanation/Reference:

  The Nutanix Field Installation Guide primarily provides instructions for using Foundation. Foundation is the tool used for deploying, imaging, and configuring Nutanix nodes in a new installation or when expanding existing clusters. This tool is

  essential for setting up the Nutanix environment correctly and efficiently.

  References:

  Nutanix University - NCS-Core 6.8 Learning Path

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

• Question 49:

  Refer to the exhibit.

  

  An administrator notices a critical alert on the Metro Availability Protection Domain What is causing this alert?

  A. Metro Availability Protection domain is active on the remote site.
  B. VMware Site Recovery Manager is handling a failover event
  C. Metro Availability did not fail over and caused an outage.
  D. vSphere moved VMs to the remote container, and the VMs must be moved back.
  A. Metro Availability Protection domain is active on the remote site.

  ---

  Explanation/Reference:

  Ref: https://www.vvlsystems.com/wp-content/uploads/2016/11/BP-2009_Metro_Availability.pdf

• Question 50:

  An administrator migrates a VM onto a new Nutanix cluster. After the migration, the administrator observes the following conditions:

  1.

  Cluster memory utilization: 64%

  2.

  Cluster CPU utilization: 19%

  3.

  Cluster storage utilization: 32%

  4.

  Average VM CPU utilization: 25%

  5.

  Average VM CPU ready%: 24%

  6.

  Average VM memory utilization: 60%

  Which two changes should the administrator make to improve VM performance? (Choose two.)

  A. Add more memory to the VMs.
  B. Reduce the number of vCPUs assigned to VMs.
  C. Replace high core count CPUs with high clock rate CPUs. (also can be but is physical invas)
  D. Reduce the number of VMs on the hosts.
  B. Reduce the number of vCPUs assigned to VMs.
  D. Reduce the number of VMs on the hosts.

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  Explanation/Reference:

  ref http://www.joshodgers.com/tag/cpu-ready/