Nutanix NCS-CORE Online Practice Questions and Exam Preparation

Nutanix NCS-CORE Online Questions & Answers

• Question 61:

  An administrator protected a DB VM running on a Nutanix cluster with NearSync Replication, which schedules to repeat every 15 minutes to a second site. The daily change rate is low. During nightly backups, the replication window is missed due to write volume.

  Which two options describe the expected behavior? (Choose two.)

  A. NearSync stops working and fails over to the remote site.
  B. Protection Domain transitions back to the hourly schedule.
  C. The Administrator needs to re-enable it manually.
  D. The system continuously tries to get to the NearSync schedule.
  B. Protection Domain transitions back to the hourly schedule.
  D. The system continuously tries to get to the NearSync schedule.

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  Explanation/Reference:

  When a NearSync Replication window is missed due to high write volume during nightly backups, the expected behavior of the system is to adjust the replication schedule temporarily and continuously attempt to return to the configured

  NearSync schedule. The correct answers are:

  Option B, "Protection Domain transitions back to the hourly schedule." If the NearSync cannot maintain the 15-minute schedule due to excessive write volume, it may temporarily fall back to a less frequent schedule, such as hourly, to

  stabilize.

  Option D, "The system continuously tries to get to the NearSync schedule." NearSync is designed to handle transient high-load situations by trying to catch up and revert to the pre-set NearSync schedule as conditions allow.

  References:These behaviors are outlined in the Nutanix documentation for NearSync, which describes how the system manages periods of high I/O and missed replication windows.

• Question 62:

  A consultant configures a Nutanix cluster and integrates the hosts into vCenter using VMware best practices. The customer has requested that the Nutanix cluster only have a single datastore.

  Upon configuring the cluster per the customer requirements, vCenter displays an alert regarding the heartbeat datastore. The consultant adds the das.ignoreInsufficientHbDatastore value = true rule. The container can be seen from each host, but the alert remains active.

  What should the consultant do to resolve this issue?

  A. Turn off and then turn back on HA.
  B. Make sure the DRS setting is turned on.
  C. Create a second container.
  D. Whitelist the vCenter IP address within Prism.
  A. Turn off and then turn back on HA.

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  Explanation/Reference:

  The alert regarding the heartbeat datastore in vCenter, despite setting das.ignoreInsufficientHbDatastore to true, suggests that HA has not acknowledged the updated configuration. The effective solution is to restart HA on the cluster, which involves turning off HA and then turning it back on. This reset will allow vCenter to re-evaluate the datastore configuration and recognize that the insufficient heartbeat datastore alert should be suppressed as per the updated setting.

  References: VMware Documentation on HA Configuration: VMware Support Nutanix and VMware Integration Guide: Nutanix Documentation

• Question 63:

  A consultant successfully creates a Nutanix cluster. The consultant needs to configure containers for the customers business critical applications and general server workloads. The customer requirements are to achieve maximum storage space savings and optimize I/O performance.

  What setting(s) should the consultant enable on the storage container(s)?

  A. Compression and deduplication
  B. Deduplication only
  C. Compression and erasure coding
  D. Compression only
  C. Compression and erasure coding

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  Explanation/Reference:

  To meet the requirements of maximizing storage space savings while optimizing I/O performance for business-critical applications and general server workloads, enabling both compression and erasure coding on the storage containers is

  recommended. Compression reduces the data footprint on storage disks, while erasure coding provides data redundancy in an efficient manner, which not only saves space but also enhances data durability and I/O performance for read-

  intensive applications.

  References:

  Nutanix University - NCS-Core 6.8 Learning Path

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

• Question 64:

  During a technical call with a customer, it is identified that this installation will be software only on Dell servers. The out-of-band management interfaces will not be given IP addresses until the consultant is onsite.

  Which Foundation method should be used for this type of installation?

  A. Bare metal using iDRAC MAC addresses.
  B. Bare metal using LAN MAC addresses.
  C. Bare metal using block serial numbers.
  D. Bare metal using node serial numbers.
  A. Bare metal using iDRAC MAC addresses.

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  Explanation/Reference:

  In scenarios where a software-only installation is planned on Dell servers without pre-configured IP addresses for out-of-band management interfaces, the iDRAC MAC addresses are crucial. Using iDRAC (Integrated Dell Remote Access Controller), a consultant can perform a bare metal installation remotely and manage the servers effectively. This method is preferable when IP addresses are not initially available, allowing the consultant to utilize the out-of-band management network for setup. References: Nutanix Installation and Configuration guides, especially those pertaining to Dell hardware, available through the Nutanix Bible and official Nutanix training materials.

• Question 65:

  Refer to the exhibit.

  

  A system administrator is using Range-Autofill tool to assign IP addresses to setup a multi- block cluster based on the following configuration:

  

  Which additional changes must be made during the Foundation process to configure the cluster correctly?

  A. Change host names
  B. Reorder block serial
  C. Change IP address
  D. Reorder blocks
  A. Change host names

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  Explanation/Reference:

  Referring to the exhibit and considering the setup of a multi-block cluster, the necessary change during the Foundation process would be to adjust the host names (Option A). The hostnames provided in the range Autofill seem to be out of order or incorrectly assigned based on the block serial numbers and node arrangement. Correctly naming the hostnames according to a logical or systematic naming convention during the setup helps in cluster management and operations post-deployment.

  References: Nutanix Foundation Tool Guide, Cluster Configuration Best Practices.

• Question 66:

  An alert about RX errors on eth2 on a node is reported in the cluster. The administrator logs in to the CVM in question, checks the ping_* files in the data/logs/syststats folder, and notices intermittent ping loss.

  The node in question has the following network configuration:

  

  Which action should be used to troubleshoot without disrupting the VMs running on this node?

  A. Replace the cable from eth2 to the switch
  B. Remove eth3 from br0-up and monitor for new alerts
  C. Check the port on the switch side for any errors
  D. Enable balance-s1b on br0-up and monitor if a problem persists
  C. Check the port on the switch side for any errors

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  Explanation/Reference:

  Given the reported RX errors on eth2 and the intermittent ping loss as observed from the CVM logs, the best initial troubleshooting step that avoids VM disruption is to inspect the switch port for errors. Option C, "Check the port on the switch side for any errors," is the most direct and non-invasive approach to determining if the issue lies with the network infrastructure rather than the server hardware itself or the configuration.

  This action helps identify whether the problem is related to the physical connection (e.g., port issues, switch configuration errors) without altering the current active network setup on the Nutanix node. If errors are found on the switch port, adjustments or repairs can be made accordingly, potentially resolving the RX errors without impacting the running VMs.

  References:This recommendation follows Nutanix's best practices for network troubleshooting, focusing first on external network components before altering host configurations.

• Question 67:

  A consultant is discussing VLAN tagging for a newly deployed Nutanix system.

  The customer requests that the the vlan dor the CVMs and AHV hosts be placed in the customer's management VLAN 10.

  The customer also has VLAN 20 for production VM traffic and VLAN 30 for backup/replication traffic.

  Which VLAN should the consultant recommend for CVM and host traffic?

  A. VLAN 10
  B. VLAN 0
  C. VLAN 20
  D. VLAN 30
  A. VLAN 10

  ---

  Explanation/Reference:

  For a newly deployed Nutanix system where the customer has specified VLAN 10 for management traffic, the consultant should recommend using VLAN 10 for both CVM and AHV host traffic. This VLAN designation ensures that all

  management, monitoring, and internal cluster communication are on a dedicated network, separate from production VM traffic (VLAN 20) and backup/replication traffic (VLAN 30), thereby enhancing network security and performance.

  References:

  Nutanix University - NCS-Core 6.8 Learning Path

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

• Question 68:

  A customer needs to meet the following requirements for their business critical application:

  1.

  SQL Servers must be on specific hosts to lower licensing costs.

  2.

  Oracle RAC servers must be on separate hosts for licensing reasons

  Which policy or policies should be implemented to meet these requirements?

  A. Configure VM-VM anti-affinity policy.
  B. Configure VM-VM affinity policy.
  C. Configure both VM-Host and VM-VM affinity policy.
  D. Configure VM-Host affinity policy.
  D. Configure VM-Host affinity policy.

  ---

  Explanation/Reference:

  For licensing reasons and to ensure compliance with software license terms, particularly for databases like SQL and Oracle RAC, VM-Host affinity policies are used. These policies help in pinning VMs to specific hosts. In this scenario, SQL Servers must be confined to specific hosts to manage licensing costs effectively, and similarly, Oracle RAC servers must be on separate hosts. The VM-Host affinity policy allows for such configuration by defining rules that keep VMs on specific hosts or separate them as needed.

  References: Nutanix Bible Nutanix University NCS-Core Materials

• Question 69:

  An administrator needs to replace the self-signed certificate on a cluster. Which two requirements must be met as part of the process? (Choose two.)

  A. The cluster administrator must restart the interface gateway.
  B. The signed, intermediate and root certificates are chained.
  C. The existing certificate must be deleted prior to replacement.
  D. The imported files for the custom certificate must be PEM encoded.
  B. The signed, intermediate and root certificates are chained.
  D. The imported files for the custom certificate must be PEM encoded.

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  Explanation/Reference:

  https://portal.nutanix.com/page/documents/details?targetId=Prism-Central-Guide-Prism-v55:mul-security-ssl-certificate-pc-t.html

• Question 70:

  In which part of the Knowledge Transfer can the customer learn how to create, escalate, comment, and close cases?

  A. Operations Guide
  B. Demonstration of the Support Portal
  C. Demonstration of features
  D. Handover Slides and Checklist
  B. Demonstration of the Support Portal

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  Explanation/Reference:

  The best way for the customer to learn how to create, escalate, comment, and close cases is through a demonstration of the Support Portal. This portion of the Knowledge Transfer focuses on showing customers how to effectively use the

  Support Portal, which is an essential tool for managing support tickets and communicating with Nutanix support. This hands-on demonstration helps ensure that customers are familiar with the functionalities and can navigate the portal

  effectively.

  References:

  Nutanix University - NCS-Core 6.8 Learning Path

  The Nutanix Bible, Support and Maintenance chapter (https://www.nutanixbible.com/)