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UGC-NET | UGC NET CS 2014 Dec – II | Question 7

  • Last Updated : 29 Sep, 2021

The Excess-3 decimal code is a self-complementing code because
(1)The binary sum of a code and its 9’s complement is equal to 9.
(2)It is a weighted code.
(3)Complement can be generated by inverting each bit pattern.
(4)The binary sum of a code and its 10’s complement is equal to 9.
(A) (1)
(B) (2) and (3)
(C) (1) and (3)
(D) All are correct.


Answer: (C)

Explanation: The Excess-3 decimal code is a self-complementing code because the binary sum of a code and its 9’s complement is equal to 9 and complement can be generated by inverting each bit pattern.
So, option (C) is correct.



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