Is it possible to work simultaneously on the same computer with Windows 10 and Server 2012R2 if it is installed on an external hard drive?

Question

Windows

Hello, tell me if you install Windows Server 2012R2 on an external hard drive, is it possible to run and work with Windows 10 in parallel?

Answer 1

even if you install not on external, but on internal, you can only boot into one of the systems at a time.
if you need it in parallel, virtualization is at your service.

Answer 2

In practice, I only checked the successful collaboration of MACOS and Windows Server using VMWARE FUSION