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. | Either (a) or (b) |
| D. | A non-privileged instruction (which does not generate an interrupt) is needed |
Answer : B Explanation :
A software interrupt is initiated by some program module which need some CPU services, at that time the two modes can be interchanged. Hence (B) is correct option.
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Option: A Explanation : Explanation will come here. Explanation will come here. Explanation will come here. Explanation will come here. Explanation will come here. |
