CPU as 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. Either a or b
D. A non-privileged instruction (which does not generate an interrupt)is needed
Answer:A
CPU as 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. Either a or b D. A non-privileged instruction (which does not generate an interrupt)is needed
Explanation: A software interrupt by some program which needs some cPU service, at that time the two modes can be interchanged.