What are three recommended prerequisites before upgrading virtual machine hardware? (Choose three.)

An administrator wants to upgrade to vCenter Server 6.x.
The vCenter Server:
Is hosted on a virtual machine server running Microsoft Windows Server 2008 R2, with 8 vCPUs and 16GB RAM.
Will have an embedded Platform Services Controller.
Hosts a Large Environment with 1,000 ESXi hosts and 10,000 Virtual Machines.
Why does the vCenter Server not meet the minimum requirements?

An administrator has upgraded a Distributed vCenter Server environment from 5.5 to 6.0.

What is the next step that should be taken?

When upgrading vCenter Server, an administrator notices that the upgrade fails at the vCenter Single Sign-On installation.
What must be done to allow the upgrade to complete?

During a vCenter Server upgrade, an ESXi 6.x host in a High Availability (HA) cluster fails.
Which statement is true?

An administrator is upgrading a vCenter Server Appliance and wants to ensure that all the prerequisites are met.
What action must be taken before upgrading the vCenter Server Appliance?

An administrator is upgrading vCenter Server and sees this error:
The DB User entered does not have the required permissions needed to install and configure vCenter Server with the selected DB. Please correct the following
error(s): %s

Which two statements explain this error? (Choose two.)

Which two vCenter Server services are migrated automatically as part of an upgrade from a Distributed vCenter Server running 5.x? (Choose two.)

What command line utility can be used to upgrade an ESXi host?

Which log file would you examine to identify an issue which occurred during the pre-upgrade phase of a vCenter Server upgrade process?