Question

Which are the two modes used in the isolation of the kernel and the user?

(a) real mode and virtual mode

(b) real mode and user mode

(c) user mode and kernel mode

(d) kernel mode and real mode

This question was addressed to me in an online interview.

I would like to ask this question from Resource Protection-II topic in section Real Time Operating systems of Embedded Systems

Answer 1

Correct option is (c) user mode and kernel mode

To elaborate: The two modes are kernel mode and the user mode which are used for isolating the kernel and the other components of the operating system from any process and user applications that are running.