Digital Logic

1:

The weight which makes the complement operation easier in BCD form is

A.

8-4-2-1

B.

Excess-3

C.

2-4-2-1

D.

BCD

 

Answer : C

Explanation :

In  BCD 8421  we simply find out the  code from 0 to 9  then we can find  complement but in 2421  we find out the 9's complement of a number  in code already so it  is easy to find  any complement  by 2421 rater than 8421. So answer is (C)  

Mayank said: (1:29pm on Wednesday 12th July 2017)
why isn't excess 3 ?? ..excess 3 code is also a self complimentry code.

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Option: A

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