Nutanix NCS-CORE Online Practice Questions and Exam Preparation

Nutanix NCS-CORE Online Questions & Answers

• Question 51:

  An administrator responsible for a VDI environment needs to investigate reports of slow logins. The administrator finds that increasing the number of vCPUs from 2 to 4 will reduce the login times. Production workloads are consuming 75% of the host CPU on the cluster. The administrator increases the vCPU count on all of the VDI VMs.

  What are two impacts on the cluster? (Choose two.)

  A. Increase CPU utilization%
  B. Increase CPU ready%
  C. Increase memory utilization%
  D. Increasing CPU counts will decrease memory utilization
  A. Increase CPU utilization%
  B. Increase CPU ready%

  ---

  Explanation/Reference:

  Increasing the number of vCPUs from 2 to 4 can indeed reduce login times by providing more processing power to handle the login requests. However, this action will have two main impacts on the cluster:

  Increase CPU utilization%: By increasing the number of vCPUs, you are effectively increasing the demand for CPU resources. This will result in a higher percentage of the CPU being utilized. Increase CPU ready%: CPU Ready is a measure

  of the amount of time a virtual machine is ready to run against the pCPU, but is waiting to be scheduled on the physical CPU. By increasing the number of vCPUs, you are increasing the number of virtual machines that are ready to run, which

  can increase the CPU Ready percentage.

  Increasing the vCPU count does not directly affect memory utilization, so options C and D are not correct.

  References:

  The conclusions above are based on general virtualization principles covered in resources like the Nutanix Bible (https://www.nutanixbible.com/) and the Nutanix University training materials for NCS-Core certification (https://

  university.nutanix.com/). These sources explain the impact of CPU allocation and utilization in detail, particularly in the context of cluster performance and virtual desktop infrastructure. Additionally, practical insights into these dynamics are

  discussed in various video tutorials from the Nutanix official YouTube playlist for NCS-Core learning (https://www.youtube.com/playlist?list=PLAHgaS9IrJecs_AcQT3Y7vSsKT2mjz3Iu), which provide visual and step-by-step breakdowns of

  how CPU resources are managed in a Nutanix environment.

• Question 52:

  A guest VM is reported to have poor storage performance. It has an I/O profile of 80% read. 20% write, and the HDDs form more than 50% of the read source.

  What should an administrator do to resolve this issue?

  A. Increase SSD capacity
  B. Increase the OPLOG
  C. Increase the write cache
  D. Use HDDs with higher RPM
  A. Increase SSD capacity

  ---

  Explanation/Reference:

  https://portal.nutanix.com/page/documents/solutions/details?targetId=BP-2126-SAS-on-Nutanix:BP-2126-SAS-on-Nutanix

• Question 53:

  An administrator needs to deploy an application with a large amount of data connected via Nutanix Volumes. Which two actions should the administrator take when designing the Volume Group? (Choose two.)

  A. Use multiple subnets for iSCSI traffic
  B. Enable RSS (Receive Side Scaling)
  C. Enable thick provisioning on the Volume Group(s)
  D. Distribute workload across multiple virtual disks
  B. Enable RSS (Receive Side Scaling)
  D. Distribute workload across multiple virtual disks

• Question 54:

  Refer to the exhibit.

  

  After performing ESXi to AHV conversion on a cluster, the alerts shown in the exhibit display on Prism. What should the administrator do to resolve this issue efficiently?

  A. Remove the VMs. create a new Protection Domain, and add VMs to it
  B. Remove VMs from the Protection Domain and add them back in.
  C. Delete the Protection Domain, create a new Protection Domain, and add the VMs to it
  D. Create a new Protection Domain and add the VMs to rt.
  B. Remove VMs from the Protection Domain and add them back in.

• Question 55:

  An organizations Nutanix Cluster is based on VMware vSphere. The cluster is configured to download software updates automatically. The administration needs to verify and eventually upgrade VMware hypervisor via Prism Ul.

  After logging in to Prism, the administrator receives the message shown:

  No available versions for upgrade

  What is causing the current state?

  A. VMware support has expired, so downloads are not available.
  B. vSphere binaries need to be manually uploaded.
  C. The environment is running the latest vSphere version, so no update is required.
  D. The cluster is unable to connect to reIease-api.nutanix-ccm:8D.
  C. The environment is running the latest vSphere version, so no update is required.

  ---

  Explanation/Reference:

  https://portal.nutanix.com/page/documents/details?targetId=Web-Console-Guide-Prism-v510:upg-hypervisor-upgrade-esxi-c.html

• Question 56:

  An administrator has a VM that consumes large amounts of storage and has the following characteristics:

  1.

  Create large / sequential writes

  2.

  Data must be kept for years

  3.

  Data is normally only accessed at the end of the year to run report

  The administrator decides to use Erasure Coding to save space.

  Which feature should the administrator utilize to save space for this VM?

  A. Inline Compression
  B. Flash Mode
  C. Cache Dedup
  D. Post-Process Compression
  D. Post-Process Compression

  ---

  Explanation/Reference:

  Erasure coding is a method of data protection in which data is broken into fragments, expanded and encoded with redundant data pieces, and stored across a set of different locations or storage media. The goal of erasure coding is to enable data that becomes corrupted at some point in the disk storage process to be reconstructed by using information about the data that's stored elsewhere in the array1.

  In the context of Nutanix, erasure coding increases the usable capacity on a cluster. Instead of replicating data, erasure coding uses parity information to rebuild data in the event of a disk failure1. The capacity savings of erasure coding is in addition to deduplication and compression savings1.

  Given the characteristics of the VM in the question (large/sequential writes, data kept for years, data accessed only at the end of the year), Post-Process Compression would be the most suitable feature to utilize to save space. This is because Post-Process Compression, as the name suggests, compresses data after it has been written to the storage, which is suitable for data that is not accessed frequently2.

  References: Erasure Coding | Nutanix Community Nutanix Support and Insights Introducing AOS 6.6: Enhanced data services and simplified ... - Nutanix

• Question 57:

  An administrator is monitoring the Nutanix v5.15-based AOS cluster performance logs and notices that a SQL server VM is greatly exceeding its intended maximum IOPS. The administrator has confirmed that a QoS policy was previously created for the group of VMs this server is a member of.

  What are two reasons that this VM would exceed its maximum configured IOPS from the QoS Policy? (Choose two.)

  A. The VM is missing the required snapshot needed to implement the QoS Policy.
  B. The VM was not created as an AFS virtual machine.
  C. The SQL Server VM has volume groups attached.
  D. It was cloned from another SQL Server VM that was a member of the QoS Policy.
  B. The VM was not created as an AFS virtual machine.
  C. The SQL Server VM has volume groups attached.

  ---

  Explanation/Reference:

  https://portal.nutanix.com/page/documents/details?targetId=Prism-Central-Guide-Prism-v5_18:mul-storage-qos-pc-c.html

• Question 58:

  A consultant has deployed a new Nutanix AHV cluster with Foundation. The customer requests separating the management and production traffic in the CVM.

  Which feature should the consultant configure?

  A. Micro-segmentation
  B. Multi-homing
  C. Network Segmentation
  D. VLAN Tagging
  D. VLAN Tagging

  ---

  Explanation/Reference:

  To separate management and production traffic within a Nutanix AHV cluster, VLAN Tagging is the appropriate feature to configure. VLAN Tagging allows different types of traffic to be segregated onto different network segments over the

  same physical infrastructure, effectively isolating management traffic from production traffic at the network level. This setup enhances security and performance by reducing the possibility of network congestion affecting critical management

  operations.

  References:

  Nutanix Bible (https://www.nutanixbible.com), specifically the sections on networking and VLANs.

  Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com), which covers advanced network configurations including VLAN Tagging.

• Question 59:

  An administrator is configuring software only. Data-at-Rest Encryption on their Nutanix cluster. They are planning to deploy a third-party key management server (KMS).

  Where should this server be hosted?

  A. As a single VM on the Nutanix cluster
  B. On hardware external to the Nutanix duster
  C. As a clustered VM setup on the Nutanix cluster
  D. As a single VM deployed on the host that contains the Prism leader CVM
  B. On hardware external to the Nutanix duster

• Question 60:

  After deployment of a Nutanix cluster, a customer has requested to validate the peak performance of the cluster.

  Which tool can a consultant use to satisfy this request?

  A. Nutanix X-Ray
  B. Nutanix HCiBench
  C. diagnostics.py
  D. Nutanix perfmon
  A. Nutanix X-Ray

  ---

  Explanation/Reference:

  To validate the peak performance of a deployed Nutanix cluster, the consultant can use:

  Nutanix X-Ray: X-Ray is a performance testing tool specifically designed for Nutanix environments, capable of simulating a variety of workloads and scenarios to measure and report on the cluster's performance capabilities.

  References:

  Nutanix Bible (https://www.nutanixbible.com), where X-Ray and its capabilities are detailed.

  Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com), which covers performance testing and validation using X-Ray.