No, by default, root has an undefined password and cannot log in from a terminal or ssh, but that doesn't mean it doesnt exist. If you make a SSH key for the root user and place it on his folder you wont need to set up a password and will be able to login just fine as UID 0. If you do 'sudo -s' as an administrator and then run 'passwd' to set the root passwd, you're not magically creating a root account, you're only changing the settings for that user, but it was already there