[m-p-3]

Not so simple, it depends how the MDM/EMM is set-up.

If it's set up to entirely manage the device, then yes it will get fully wiped (we do this for corporate-owned device).

A personal device can access our environment if requested (they have to sign an agreement form, explaining what we can or cannot do) and a work sandbox will be created, in which only the apps installed in this sandbox will have access to corporate data (ex: you'll have a copy of Gmail, Hangouts, Drive, etc in the sandbox).

In the situation of a personal device, a wipe will only remove that sandbox, leaving the personal data untouched.