Question

Which one of the following is allowed only in kernel mode?

A) Read the time of day clock

B) Save the status of process

C) change the PC content.

D) non of these

Answer 1

context switching is done in kernel mode so acc to that b and c should occur in kernel mode

Comments

I think both have context switches but kernel will have more context switches compare to user level!

---

is there any specific explanation which helps to determine when the kernel mode is activated and when the user mode is activated. ????