Regarding an upgrade from vCenter 6.7 to version 7.0, which statement is true?

The statement about upgrading the vCenter Server utilizing a pre-configured customized JSON template is correct. During the vCenter Server upgrade process, particularly in version 7.0, VMware introduced improvements that allow for a more automated and efficient installation process. JSON templates can streamline the configuration of the installation parameters, making it easier for administrators to deploy or upgrade vCenter Server without needing to manually enter configuration details.

This approach not only simplifies the upgrade process but also enhances consistency and reduces the potential for errors during configuration. As organizations look to enhance their infrastructure management capabilities, utilizing such templates can be a significant benefit for rapid deployments and upgrades in large-scale environments.

In contrast, while ESXi hosts can be upgraded using various methods, including command-line tools like ESXCLI and utilities such as the VMware Update Manager, the suggestion that they can only be upgraded via the Graphical User Interface Installer is limiting and incorrect. Regarding the need for Auto Deploy in large-scale environments, it is not a mandatory requirement; other methods can effectively manage upgrades too. Lastly, with vCenter 7.0, there is no mandatory requirement to deploy a new Platform Services Controller first, as the new architecture allows for simplified deployments without the need for a separate PSC in many scenarios.