[Feb-2025] NCS-Core Exam Questions and Valid NCS-Core Dumps PDF
NCS-Core Brain Dump: A Study Guide with Tips & Tricks for passing Exam
NEW QUESTION # 114
The consultant is deploying a 20-node AHV cluster, as part of a Nutanix Files deployment.
How many FSVMs can the consultant deploy in this environment?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
Explanation:
In a Nutanix Files deployment within a 20-node AHV cluster, the consultant can deploy a maximum of 16 FSVMs (File Server Virtual Machines). This limitation is based on Nutanix's best practices and design considerations for scalability and performance. The number of FSVMs that can be effectively managed and maintained without degrading the performance of the file-serving operations or the underlying storage infrastructure dictates this maximum.
References:
* Nutanix Certified Services - Core (NCS-Core) Learning Documents
* Nutanix Bible: https://www.nutanixbible.com
* Nutanix University Videos:
https://www.youtube.com/playlist?list=PLAHgaS9IrJecs_AcQT3Y7vSsKT2mjz3Iu
NEW QUESTION # 115
A consultant notices while assigning VLAN tags to hosts and CVMs in a running cluster, that Prism Element displays alerts indicating a node is down.
What should the consultant do to prevent these alerts?
- A. Only change the Controller Virtual Machine VLANs.
- B. Stop the Nutanix cluster before changing VLANs.
- C. Only change the hypervisor VLANs.
- D. Restart the Nutanix cluster.
Answer: B
Explanation:
When changing VLAN configurations for hosts and Controller Virtual Machines (CVMs) in a Nutanix cluster, doing so while the cluster is running can result in temporary communication losses, leading to alerts such as a node appearing down. To avoid these disruptions and ensure a smooth reconfiguration process, it is advisable to stop the cluster services before making VLAN changes. This prevents the cluster from detecting intermittent connectivity as node failures, thereby avoiding false alerts in Prism Element.
References:
* Nutanix Bible (https://www.nutanixbible.com), particularly the sections discussing cluster operations and network reconfiguration.
* Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com), which includes best practices for network configuration.
NEW QUESTION # 116
A consultant is planning an installation and needs to collect configuration items to be used during the install.
The data needed from the customer are IP addresses, Gateway, DNS servers, and NTP Servers.
Which Cluster Deployment document must be completed with the customer?
- A. Questionnaire
- B. Project Plan
- C. Technical Checklist
- D. Operations Guide
Answer: C
NEW QUESTION # 117
Which two components must be identified to validate that software compatibility requirements are met for Nutanix Cluster Installation? (Choose two.)
- A. Hypervisor
- B. Firmware
- C. Guest OS
- D. AOS
Answer: A,D
Explanation:
Validating software compatibility for a Nutanix cluster installation necessitates the identification of the AOS version and the type of Hypervisor in use. AOS is central to the Nutanix infrastructure, governing storage, compute, and networking functions. The hypervisor layer is critical as it supports the virtual machines running on the cluster. Compatibility between these components ensures stable operation and support for all features.
References: Nutanix Certified Services - Core (NCS-Core) Learning Documents
NEW QUESTION # 118
In a 20-node ESXi deployment, the customer needs additional resiliency to survive the loss of two nodes concurrently.
Which configuration should the consultant use to ensure that the appropriate resources are available?
- A. Storage reservation for 10%; HA admission control for 10%, cluster RF3
- B. Storage reservation for 5%; HA admission control for 5%, cluster RF2
- C. Storage reservation for 5%; HA admission control for 5%, cluster RF3
- D. Storage reservation for 10%; HA admission control for 10%, cluster RF2
Answer: C
Explanation:
To ensure additional resiliency in a 20-node ESXi deployment capable of surviving the concurrent loss of two nodes, the consultant should configure the system with a storage reservation and HA (High Availability) admission control each set to 5%, combined with a cluster redundancy factor (RF) of 3. RF3 provides the capability to tolerate the failure of up to two nodes without data loss, thus enhancing the cluster's resilience.
This configuration is optimal for maintaining cluster availability and integrity during multiple node failures.References: Nutanix Bible, Nutanix University
NEW QUESTION # 119
After deploying an AHV cluster connected to Cisco Nexus 9k switches, unexpected network behavior is observed. The consultant needs to rule out physical network mis-cabling without returning to the datacenter.
Which command from the host should the consultant run?
- A. show lldp neighbors
- B. lldpctl
- C. show cdp neighbors
- D. show interfaces
Answer: B
Explanation:
To troubleshoot physical network mis-cabling without physical access to the data center and connected to Cisco Nexus 9k switches, the appropriate command to run from the Nutanix AHV host is lldpctl. This command allows the consultant to view the Link Layer Discovery Protocol (LLDP) information about directly connected devices. LLDP is supported on Nexus switches and provides detailed network topology information, which is crucial for identifying how the AHV nodes are connected to the switches, and to verify correct physical connections.References: Nutanix Command Reference Guide, Cisco Nexus 9000 Series documentation.
NEW QUESTION # 120
A customer needs to meet the following requirements for their business critical application:
* SQL Servers must be on specific hosts to lower licensing costs.
* 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 affinity policy.
- B. Configure VM-VM anti-affinity policy.
- C. Configure both VM-Host and VM-VM affinity policy.
- D. Configure VM-Host affinity policy.
Answer: D
Explanation:
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
NEW QUESTION # 121
A customer wants to use NIC teaming on an ESXi host using a vSphere Standard Switch configured with the Route based on physical NIC load load balancing option. The customer does not see the option when editing the Teaming and Failover settings for the switch.
How should the consultant resolve this issue?
- A. Install a vCenter server to manage the switch
- B. Add a vSphere Distributed Switch
- C. Change the load balancing option on the switch.
- D. Add another physical NIC to the team.
Answer: A
Explanation:
For a customer to use NIC teaming with the "Route based on physical NIC load" load balancing option on an ESXi host using a vSphere Standard Switch, they need vCenter Server. This specific load balancing method is not available on a vSphere Standard Switch without vCenter management, as it requires vSphere Distributed Switch capabilities that are managed via vCenter Server. By installing a vCenter server, the customer can upgrade from vSphere Standard to Distributed Switches and access more advanced features including the desired NIC teaming option.References: VMware vSphere Documentation, Nutanix Bible.
NEW QUESTION # 122
A customer has the following requirement for a Nutanix cluster:
* Must support high-performance Nutanix Volumes iSCSI workloads
* Must utilize AHV nodes
* Must use 10 GbE interface
How should the customer optimize networking?
- A. Enable Jumbo Frame on just the Host
- B. Enable Jumbo Frames on just the CVM
- C. Convert Cluster to ESXi and enable Jumbo Frame on Host and CVM
- D. Enable the use of Jumbo Frame on Host and CVM
Answer: D
Explanation:
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.
References:
* Nutanix Bible: Networking Best Practices
* Nutanix University: Nutanix Network Optimization
NEW QUESTION # 123
An organization is planning an upgrade to AOS 5.15 and wants to understand which cluster products and/or services are supported for physical traffic isolation.
Which Nutanix component supports its network traffic being isolated onto its own virtual network?
- A. Objects
- B. Files
- C. Volumes
- D. Containers
Answer: C
NEW QUESTION # 124
A consultant is showing the Prism Element Web Console to a customer and wants to check that cluster health is OK. During validation, the Health menu raises critical alerts about components using default passwords.
The cluster is based on ESXi as hypervisor, where Prism Central and Nutanix Files are deployed. Passwords have already been changed for a few components, but some of them have been left by default.
How can the consultant check and handle that situation?
- A. Check accounts and passwords in Local User Management in the vCenter.
- B. Deploy and connect the cluster to Prism Security Central.
- C. Activate Cluster lockdown in Prism Element.
- D. Check NCC results and review the associated KB.
Answer: D
Explanation:
To address critical alerts about components using default passwords in the Prism Element Web Console:
* C. Check NCC results and review the associated KB: The Nutanix Cluster Check (NCC) tool can identify security vulnerabilities, including default password usage. Reviewing the results and associated knowledge base articles provides specific guidance on changing these passwords to secure the environment.
References:
* Nutanix Bible (https://www.nutanixbible.com), specifically sections on cluster health checks and security practices.
* Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com), which includes instruction on using NCC for cluster validation and security enhancements.
NEW QUESTION # 125
A consultant is onsite with a customer running Foundation VM (FVM) and discovers that there is no connectivity between the FVM and their laptop. The consultant verifies the following:
* The consultant's laptop and Nutanix nodes are plugged into a flat switch.
* The laptop, switch and nodes are plugged into supported power supplies.
* The laptop network adapters and FVM are configured with their corresponding IP addresses.
What is the cause for the connectivity failure to the FVM?
- A. The switch is not plugged into the power supply.
- B. Laptop WiFi configured to use DHCP.
- C. Desktop Firewall is blocking ping requests.
- D. Network cables are not connected.
Answer: C
Explanation:
If there is no connectivity between the Foundation VM (FVM) and the consultant's laptop despite all devices being properly powered and correctly configured, the likely cause is the desktop firewall on the consultant's laptop blocking ping requests. This is a common issue that can prevent communication over the network even when all other network configurations are correct. The consultant should check the firewall settings and allow the necessary permissions for network communications to establish connectivity.References: Nutanix Network Troubleshooting Guide, Nutanix Installation and Configuration Documentation.
NEW QUESTION # 126
A consultant is preparing to add new nodes into an existing cluster. The current cluster AOS version is 5.8.
The new expansion node is currently running AOS 5.9 code. The cluster must continue to run at its current AOS version.
Which method can be used to successfully add the node?
- A. Upgrade the cluster to 5.9 and add the node through Prism Element.
- B. Use Prism Element to Expand the cluster and select the re-image option.
- C. Use the CLI and enter cluster add-node node-serial="node_serial".
- D. Use Prism Element, which will downgrade the node by default during the node add process.
Answer: B
Explanation:
When adding a new node with a higher AOS version (5.9) into an existing cluster running an older version (5.8), the recommended method is to use Prism Element to expand the cluster and select the re-image option.
This process involves re-imaging the new node to the AOS version currently running in the cluster (5.8), ensuring compatibility and stability across the cluster without requiring an overall upgrade to a newer version.
This approach maintains the cluster's operational integrity while integrating the new hardware.References:
Nutanix Bible, NCS-Core 6.8 official training materials, and Nutanix support documentation on cluster expansion.
NEW QUESTION # 127
A customer wants to run SAP HANA on a Nutanix cluster with the following characteristics:
* AHV nodes
* SAP HANA version 2
* Production database files
Which configuration should be recommended to the customer?
- A. Plate the SAP HANA Database on the same socket as CVM
- B. Start with a cluster containing three or more nodes
- C. Enable only compression for the container that contains the Production database
- D. Do not enable compression, deduplication. or erasure coding on the storage container
Answer: D
Explanation:
Ref:
NEW QUESTION # 128
Imaging fails for one or more nodes in the cluster
A log file displays this output:
Interface ethO has an uplink.
Downloading livefs files... Connecting to 10.249.230.171:8000 (10.249.230.171:8000) [80.852033] random:
nonblocking pool is initialized
tar: short read livecd files not found.
What is the possible root cause?
- A. Hypervisor version is not on the whitelist (iso_whitelist. j son).
- B. There is a problem connecting to the Foundation VM.
- C. AOS version is incompatible.
- D. IPMI credentials are invalid.
Answer: B
Explanation:
The log file output indicating a failure in downloading livefs files and problems finding the livecd files during node imaging suggests there is a problem connecting to the Foundation VM. The specific error "tar: short read livecd files not found" typically points to an interrupted or failed download process, which can be caused by connectivity issues between the nodes and the Foundation VM. Ensuring robust network connectivity or verifying network settings in the Foundation VM could resolve this issue.References: Nutanix Foundation Tool Error Messages, Nutanix Troubleshooting Documentation.
NEW QUESTION # 129
A consultant is deploying a two-node cluster at a remote branch office.
Which component must be available to complete cluster configuration?
- A. Prism Central
- B. Remote Site
- C. Witness VM
- D. Protection Domain
Answer: C
Explanation:
In the deployment of a two-node cluster at a remote branch office, the presence of a Witness VM is essential to manage the cluster quorum and data integrity in case one of the nodes fails or becomes unreachable. The Witness VM acts as an external arbitrator that helps prevent data unavailability and split-brain scenarios in a situation where the cluster nodes cannot communicate with each other. This configuration is necessary because with only two nodes, there isn't a third node to maintain quorum natively.References: Nutanix Bible, Nutanix University
NEW QUESTION # 130
A consultant is reimaging a Nutanix cluster with a supported ISO, but Foundation returns an error that the media is not a supported ISO.
Which two actions should the consultant take to resolve this issue? (Choose two.)
- A. Obtain the MD5 checksum of the ISO and confirm the MD5 checksum of ISO is listed.
- B. Edit the whitelist file in Foundation.
- C. Download and replace with the latest iso whitelist. json from the Support Portal.
- D. Restart the imaging process in Foundation.
Answer: A,C
Explanation:
When Foundation reports an error indicating the ISO is not supported:
* Option B: Checking the MD5 checksum of the ISO file ensures that it matches the expected value listed by Nutanix, confirming the file's integrity and compatibility.
* Option D: Downloading and updating the iso whitelist.json from the Nutanix Support Portal ensures that Foundation has the latest information on supported ISO files, potentially resolving compatibility issues.
References:
* Nutanix Bible (https://www.nutanixbible.com), especially sections on Foundation and ISO troubleshooting.
* Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com), which covers the setup and troubleshooting of Foundation.
NEW QUESTION # 131
An administrator manages the following two Nutanix AOS 5.15 cluster environment:
* Corp-cluster-01
* Corp-cluster-02
The VM images must be available only on Corp-cluster-01, but cannot be checked out to cluster Corp-cluster-02. The images also cannot be checked out to any other clusters that are registered with Prism Central in the future.
Which two configuration settings must the administrator choose when creating the image placement policy that satisfies the stated requirements? (Choose two.)
- A. Set the policy enforcement to Hard.
- B. Create an image placement policy that identifies cluster Corp-cluster-02 as the target cluster.
- C. Create an image placement policy that identifies cluster Corp-cluster-01 as the target cluster
- D. Set the policy enforcement to Soft.
Answer: A,C
Explanation:
Ref: https://next.nutanix.com/community-blog-40/nutanix-just-made-ahv-image-management-painless-33144
NEW QUESTION # 132
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. Verify the virtual NIC in the Foundation VM is bound to the correct physical Host adapter.
- B. Verify the virtual NIC in the Foundation VM is bound to the correct wireless network adapter.
- C. Remove and re-import the Foundation VM to ensure the virtual NIC is set to Host-Only.
- D. Confirm the IP addresses and subnet masks are correct.
Answer: A,D
NEW QUESTION # 133
The networking team makes changes to the Top of Rack switches to which the Nutanix cluster are attached. A few VMs are able to communicate with each other on the same node but are unable to connect to other parts of the network.
What is the likely cause of this issue?
- A. There is a VLAN misconfigurationon the VMs.
- B. There is a VLAN misconfiguration on the switch.
- C. The vNIC port is disconnected on the affected VMs.
- D. Jumbo Frame are misconfigured across ports.
Answer: B
NEW QUESTION # 134
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