A: By defaultServer Core installation includes .NET components and PowerShell. These components, including PowerShell, can be uninstalled and removed from the disk footprint if a very minimal server installation is required. You can use PowerShell to uninstall them, and itself, by using the following command:
uninstall-windowsfeature PowerShellRoot, NET-Framework-45-Features -remove -whatif
Notice I have the -whatif switch which will stop any changes from actually being made, because many roles and features are unavailable once .NET is removed.