Nutanix NCS-CORE Online Practice
Questions and Exam Preparation
NCS-CORE Exam Details
Exam Code
:NCS-CORE
Exam Name
:Nutanix Certified Services Core Infrastructure Professional
Certification
:Nutanix Certifications
Vendor
:Nutanix
Total Questions
:302 Q&As
Last Updated
:Jul 08, 2026
Nutanix NCS-CORE Online Questions &
Answers
Question 291:
During the knowledge transfer on Prism GUI, a customer asked about AHV best practices for VM High Availability on a five-node cluster and the safest configuration. The consultant informed the customer that best practices dictate that all storage containers are configured with a replication factor of 3.
What will be the behavior if the non-default Guarantee mode is selected on Prism with two AHV host failures?
A. Keeping the default mode will ensure that all VMs can restart in case of two AHV host failures. B. Keeping the default mode will ensure that all VMs can restart in case of an AHV host failure. C. Will ensure that all VMs can restart if two AHV nodes remains online. D. Will ensure that all VMs can restart in case of two simultaneous AHV host failures.
D. Will ensure that all VMs can restart in case of two simultaneous AHV host failures.
Explanation/Reference:
In a five-node cluster with storage containers configured with a replication factor of 3, the behavior of VM High Availability when two AHV host failures occur with the non-default "Guarantee mode" enabled is as follows:
Will ensure that all VMs can restart in case of two simultaneous AHV host failures:
This mode prioritizes maintaining VM availability by reserving enough resources to restart VMs even with multiple host failures, as long as at least three hosts (matching the replication factor) remain functional.
References:
Nutanix Bible (https://www.nutanixbible.com), specifically sections on VM High Availability and replication factors.
Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com), where best practices for VM High Availability are detailed.
Question 292:
A Nutanix cluster is deployed with the following configuration:
1.
Three four-node blocks (A, B, and C)
2.
All Flash Redundancy Factor 2
What is the effect of simultaneous disk failures on two nodes located in block A?
A. VMs are migrated off of the nodes with disk failures. B. Each node with a failed disk is marked as degraded. C. VM read and write operations continue normally. D. VMs on the nodes with failed disks are unable to write data
C. VM read and write operations continue normally.
As a part of a cluster deployment test plan, a customer asks the consultant for some additional performance and resiliency tests.
How should the consultant best satisfy this request?
A. Deploy X-Ray and conduct any relevant tests. B. use Apache Jmeter. C. Run diagnostics.py directly from CVM. D. Leverage lometer.
A. Deploy X-Ray and conduct any relevant tests.
Explanation/Reference:
To satisfy the customer's request for additional performance and resiliency tests on a cluster, deploying Nutanix X-Ray is the best option. X-Ray is a performance testing and benchmarking tool specifically designed for hyper-converged infrastructures and provides a range of tests that simulate real-world scenarios, stress tests, and resiliency tests. This tool allows the consultant to comprehensively assess the performance, fault tolerance, and operational resilience of the Nutanix cluster, meeting the customer's testing requirements effectively.References: Nutanix X-Ray Documentation, Nutanix Performance Testing Best Practices.
Question 294:
A consultant is using a customer's switch for installation. Although the 10GbE ports for each of the hosts are connected to the switch, the nodes fail to be discovered. What is causing the issue?
A. IPv6 is not enabled on the switch. B. IPMI port is not plugged in. C. Foundation VM is running on a Windows host. D. 10GbE ports are configured with the incorrect duplex setting.
A. IPv6 is not enabled on the switch.
Explanation/Reference:
The failure to discover nodes during installation can often be attributed to the lack of IPv6 support on the network, especially if the Foundation process relies on IPv6 for node discovery. If IPv6 is not enabled on the customer's switch, the discovery packets may not be properly routed, resulting in the nodes not being discovered. Enabling IPv6 on the switch could resolve this discovery issue.
References: Nutanix Foundation Troubleshooting Guide: Nutanix Support Portal Network Configuration and Troubleshooting Documentation
Question 295:
After a recent installation using a flat switch, a consultant notices issues migrating the Nutanix nodes to the customer's network. The customer states that they are using VLANs on the production switch but not on the dedicated switch for IPMI. The customer does not require a manual configuration of the host and CVM.
What network changes need to be made to correct the issues?
A. Us untagged VLANs for the CVM and host and trunk mode for IPMI. B. Use Native VLANs for the CVM and host and access mode for IPMI. C. Use tagged VLANs for the CVM and host and access mode for IPMI. D. Use Native VLANs for the CVM and host and trunk mode for IPMI.
C. Use tagged VLANs for the CVM and host and access mode for IPMI.
Explanation/Reference:
The proper network configuration to solve the described issue involves using tagged VLANs for the CVM (Controller Virtual Machine) and host, allowing these components to correctly interact with the customer's VLAN-configured network. For
the IPMI (Intelligent Platform Management Interface), which is used for out-of-band management and does not require connectivity to multiple VLANs, setting it to access mode is appropriate. This configuration ensures that the IPMI only
communicates over a single, untagged VLAN, effectively isolating its traffic from the production network.
References:
Nutanix Bible (https://www.nutanixbible.com), particularly the sections on networking and VLAN configurations.
Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com), where VLAN and network settings are covered.
Question 296:
The following critical Availability Alert displays in prism Central:
Availability Zone configured in Protection Policy PP-BCA-1HR is not accessible.
The protection Policy PP-BCA-1HR includes a business critical application with a 1-hour snapshot frequency.
What is causing this issue?
A. There is a scheduled outage for the Availability Zone referenced in Protection Policy PP-BCA-1HR. B. Workloads included in PP-BCA-1HR are no longer within their intended RPO. C. Prism Central in the Availability Zone for PP-BCA-1HR is unavailable. D. NearSync replication between the Availability Zones has fallen out of scope.
B. Workloads included in PP-BCA-1HR are no longer within their intended RPO.
Explanation/Reference:
The alert for Protection Policy PP-BCA-1HR indicating critical availability issues is most likely due to the workloads included in the policy no longer meeting their intended Recovery Point Objective (RPO). A 1-hour snapshot frequency implies a stringent RPO, which if not maintained, could result in data loss beyond acceptable business limits. This scenario typically generates a critical alert in Prism Central, especially when the snapshots required to meet the RPO are not completed as scheduled due to any number of issues such as resource constraints or network issues.References: Nutanix Prism User Guide, Nutanix Data Protection Best Practices.
Question 297:
A consultant is reviewing a customers Pre-delivery Questionnaire.
The customer wants to deploy their cluster with ESXi as the hypervisor with vSphere Distributed Switch. The customer will be using Cisco Nexus 9k as their switch choice In the kick-off call, it is confirmed that the customer has a business
requirement to use LACP in their environment.
What should the consultant ensure that the customer configures on the port-channel interface before deployment?
A. show pore-channel B. no lacp graceful-convergence C. service unsupported-transceiver D. no lacp suspend-individual
D. no lacp suspend-individual
Explanation/Reference:
Given that the customer is using a Cisco Nexus 9k switch and wants to deploy ESXi with a vSphere Distributed Switch while using LACP, the consultant should ensure that the customer configures:
no lacp suspend-individual: This command ensures that LACP doesn't suspend the individual port if it does not receive LACP PDUs from the other side, which is crucial in environments where continuous connectivity is required for all member
links of the port-channel to maintain uninterrupted network services.
References:
Nutanix Bible (https://www.nutanixbible.com), where it discusses ESXi configurations and switch settings.
Cisco Nexus configuration guides, referred through Nutanix's training materials, which recommend settings for optimal integration with Nutanix environments.
Question 298:
An administrator has an existing Nutanix seven-node cluster running at RF2 that must be changed to have the following capabilities:
1.
RF3 set for the cluster
2.
Performance tier deduplication
What is the minimum memory needed on the CVMs to allow for these capabilities?
A customer has the following requirement for a Nutanix cluster:
1.
Must support high-performance Nutanix Volumes iSCSI workloads
2.
Must utilize AHV nodes
3.
Must use 10 GbE interface
How should the customer optimize networking?
A. Enable Jumbo Frame on just the Host B. Convert Cluster to ESXi and enable Jumbo Frame on Host and CVM C. Enable Jumbo Frames on just the CVM D. Enable the use of Jumbo Frame on Host and CVM
D. Enable the use of Jumbo Frame on Host and CVM
Explanation/Reference:
For high-performance iSCSI workloads, especially in a Nutanix environment using AHV nodes and a 10 GbE interface, enabling Jumbo Frames on both the Host and the Controller Virtual Machine (CVM) is recommended. Jumbo Frames allow for a larger payload per network packet, which reduces the overhead required to send large amounts of data. Enabling Jumbo Frames on both the host and the CVM ensures that both ends of the communication channel can handle larger packets, thereby optimizing throughput and reducing latency for high-performance workloads.
A consultant deploys a Nutanix cluster with AOS and ESXi. The cluster is managed by a vCenter server. After installation, what should the consultant do to ensure the cluster will support network segmentation?
A. Connect both CVM eth0 and eth2 interfaces to vSwitchNutanix. B. Manually assign an IP address to the CVM eth2 interface. C. Connect both CVM eth0 and eth2 interfaces to the assigned portgroups. D. Add another vSwitch to the cluster.
C. Connect both CVM eth0 and eth2 interfaces to the assigned portgroups.
Explanation/Reference:
After deploying a Nutanix cluster with AOS and ESXi managed by a vCenter server, the consultant should ensure that both CVM eth0 and eth2 interfaces are connected to the assigned portgroups on the standard or distributed switch. This setup allows for network segmentation and proper traffic isolation, which is crucial for maintaining network security and efficiency in a virtualized environment.References: Nutanix Bible, Nutanix University NCS-Core 6.8 learning materials
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