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The bit that is undefined for page directory entries is

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in Microprocessor by (39.4k points)
The bit that is undefined for page directory entries is

(a) P-bit

(b) A-bit

(c) D-bit

(d) All of the mentioned

This question was posed to me at a job interview.

This interesting question is from Paging in portion 32-bit Processors-80386, 80387 and 80486 of Microprocessor

1 Answer

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by (49.2k points)
Right option is (c) D-bit

The explanation: The D-bit is undefined for page directory entries.

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