Answer:
Yes.
Explanation:
Technically it depends on how you define "function". Usable? Yes, required. Turn on? No, not required. If there is no OS you'll get an error saying there is no boot disk/drive.
Answer:
Authorization is granting permission for admittance. ACLs provide file system security for protecting files managed by the user. Rule-Based Access Control can be changed by users.
Explanation: