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The instruction that is executed at privilege level zero (0) is

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in Microprocessor by (39.4k points)
The instruction that is executed at privilege level zero (0) is

(a) LDT

(b) LGDT and LLDT

(c) GDT

(d) None of the mentioned

This question was addressed to me during an online interview.

This intriguing question originated from Protected Virtual Address Mode (PVAM) -2 in section 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 (b) LGDT and LLDT

To explain: The LGDT and LLDT instructions are privileged, and may be executed only at privilege level 0.

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