which of these statements are true about vSwicth uplinks?

An administrator must perform maintenance on a fibre channel switch connected to vmhba2 on an ESXi host. The ESXi host has been configured with the Fixed policy, and the preferred path will be impacted by the maintenance event. Which procedure is the least disruptive option that can be taken to prepare for the maintenance event?

Which condition produces a warning message but will allow a VMotion migration to proceed?

Which two conditions will cause a vMotion validation check to fail? (Choose two.)

An administrator determines that a virtual machine configured for the Development port group lost network connectivity when it was migrated with vMotion from one ESXi 5.x host to another. The administrator notices that machines configured for the Production port group are not experiencing the issue. The hosts have port groups with the following network configuration:
Host A:
Production (VLAN 100)
Development
Host B:
Production (VLAN 100)
Development (VLAN 200)
Which two conditions would explain the loss of network connectivity for the virtual machine? (Choose two.)

An administrator has a mixture of Intel-based ESX Hosts in a DRS cluster where the CPUs are compatible in every way except that some support the NX/XD feature and some do not. Which two actions will minimize the effect of these differences? (Choose two.)

A storage array containing a VMFS datastore must be taken offline for maintenance. What can be done to avoid virtual machine downtime on VMs running in this datastore?

What would cause the proportional share mechanism to be invoked?

Which memory conservation technique allows the secure elimination of redundant copies of memory pages between virtual machines on the host?

Which functionality does vSphere HA provide?