Nutanix Certified Associate Practice Exam

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What should an administrator do to ensure that VMs can restart after a host failure?

Select Manage VM High Availability
Check Enable HA Reservation
Configure CPU and Memory settings
Adjust VM disk settings

The correct answer is: Check Enable HA Reservation

To ensure that virtual machines (VMs) can restart after a host failure, checking or enabling HA (High Availability) reservation is crucial. HA reservation refers to the allocation of reserved resources in a cluster that guarantees the availability of sufficient CPU and memory resources for the VMs in the event of a host failure. When a host goes down, the remaining hosts within the cluster can automatically restart the affected VMs, provided that there are enough reserved resources available to accommodate those starts. This mechanism is vital in maintaining business continuity, as it minimizes downtime and enhances overall availability for applications and services running on those VMs. Without proper HA reservation in place, the system may not have the necessary resources readily available to successfully restart all affected VMs, which could lead to service disruptions. Other considerations like managing VM high availability or adjusting VM disk settings are important for overall performance and management but do not directly address the critical resource availability needed for a successful reboot of VMs after a host failure.