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Once the CPL is selected, it can be changed by

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in Microprocessor by (39.4k points)
Once the CPL is selected, it can be changed by

(a) hold

(b) transferring control using system descriptors

(c) transferring control using gate descriptors

(d) transferring control using interrupt descriptors

I had been asked this question in a job interview.

The question is from Privilege in chapter 80286-80287-A Microprocessor with Memory Management and Protection of Microprocessor

1 Answer

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by (49.2k points)
The correct option is (c) transferring control using gate descriptors

Easy explanation: Once the CPL is selected, it cannot be changed during the execution normally in a single code segment. It can only be changed by transferring the control, using gate descriptors, to a new segment.

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