Question

Which of the following is a way the operating system prevents unknown or unauthorized users from accessing the system ?

A. Device driver

B. User interface

C. Protected mode

D. Software firewall

Answer 1

The answer is C. Protected mode

Step-by-step explanation:

In protected mode, there are four privilege levels or rings, numbered from 0 to 3, with ring 0 being the most privileged and 3 being the least. The use of rings allows for system software to restrict tasks from accessing data, call gates, or executing privileged instructions.