GATE 2001

Question 13

A CPU has two modes-privileged and non-privileged. In order to change the mode from privileged to non-privileged

A	a hardware interrupt is needed
B	a software interrupt is needed
C	a privileged instruction (which does not generate an interrupt) is needed
D	a non-privileged instruction (which does not generate an interrupt is needed

Question 13 Explanation:

For switching between privileged to non-privileged area, non-privileged instruction is used, without interrupt.

Correct Answer: D

Question 13 Explanation:

For switching between privileged to non-privileged area, non-privileged instruction is used, without interrupt.