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E8C09:Which digital code allows only one bit to change between sequential code values?

E8C09E8C

Which digital code allows only one bit to change between sequential code values?

Direct answer summary (2024-2028 NCVEC pool)

The official correct answer for E8C09 is Gray code.

The key fact is Gray code. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.

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