If you expect to be doing take home assignments, you need to know how to use virtual machines, restrictive outgoing white list only firewalls (or at least open snitch) and wipe everything except the source code you create. Between companies / every single use
If a prospective employer refused to conduct my interview because their anti-cheating software could detect I was using a virtual machine, then I would tell them to go fuck themselves.
I would rather clean toilets with dignity than be bitch-whipped into programming for such psychopathic entities.