NCP Virtual Machine Management 4 — Questions and Answers
Question 1: Which memory overcommit feature in AHV allows more vRAM to be allocated across VMs than the physical RAM available on a host?
- Memory Ballooning
- Transparent Page Sharing
- Memory Compression
- Memory Overcommit is not supported in AHV (Correct answer)
Correct answer: Memory Overcommit is not supported in AHV
AHV does not support memory overcommit; each VM's allocated memory must be backed by physical RAM on the host, ensuring predictable performance.
Question 2: In Nutanix Prism, what metric is used to measure the actual storage I/O performance of a VM at a given moment?
- IOPS (Input/Output Operations Per Second) (Correct answer)
- CVM Throughput
- Stargate Queue Depth
- RF Write Amplification Factor
Correct answer: IOPS (Input/Output Operations Per Second)
IOPS is the primary metric displayed in Prism to measure how many read and write operations a VM is performing per second.
Question 3: What is the purpose of the 'Guest Customization' feature when deploying VMs from templates in Nutanix?
- Applies OS patches automatically after deployment
- Configures unique host settings like hostname, IP, and SID during first boot (Correct answer)
- Installs Nutanix Guest Tools on the VM
- Enables application-consistent snapshots
Correct answer: Configures unique host settings like hostname, IP, and SID during first boot
Guest Customization (Sysprep for Windows, cloud-init for Linux) automatically configures VM-specific settings like hostname and network during the first boot.
Question 4: Which Nutanix feature allows administrators to set minimum, maximum, and burst resource limits for VM CPU and memory?
- VM Resource Policies (Correct answer)
- Quality of Service (QoS) Groups
- Prism Pro X-Play
- vTPM Configuration
Correct answer: VM Resource Policies
VM Resource Policies in Nutanix allow administrators to define minimum guaranteed resources, maximum caps, and burst limits for individual VMs.
Question 5: When performing a VM disk hot-add in AHV, what is a key requirement for the operation to succeed without a reboot?
- The VM must have NGT installed
- The guest OS must support SCSI hot-plug and have appropriate drivers (Correct answer)
- The VM must be in a protection domain
- The disk must be added from a pre-existing snapshot
Correct answer: The guest OS must support SCSI hot-plug and have appropriate drivers
Hot-adding a disk without rebooting requires the guest OS to support SCSI hot-plug, which modern Windows and Linux distributions typically support with appropriate drivers.
Question 6: In Nutanix AHV, what is the role of the 'VirtIO' driver within guest VMs?
- Provides GPU acceleration for graphics-intensive workloads
- Enables paravirtualized high-performance network and disk I/O (Correct answer)
- Manages communication between NGT and the CVM
- Controls VM live migration traffic
Correct answer: Enables paravirtualized high-performance network and disk I/O
VirtIO is a paravirtualization framework that provides guest VMs with high-performance network and disk drivers, significantly improving I/O throughput in AHV.
Question 7: What Nutanix capability allows a VM running on one cluster to be migrated to another cluster with minimal downtime?
- Cross-Cluster Live Migration via Nutanix Move (Correct answer)
- AHV vMotion
- Protection Domain Failover
- Calm Blueprint Redeployment
Correct answer: Cross-Cluster Live Migration via Nutanix Move
Nutanix Move (formerly Xtract) facilitates cross-cluster and cross-hypervisor VM migrations with minimal downtime using change block tracking.
NCP Virtual Machine Management 4
Which memory overcommit feature in AHV allows more vRAM to be allocated across VMs than the physical RAM available on a host?