Digital Logic - Number representation and computer arithmetic

11:

If (12A7C )16  = (X)8 then value of X is

 A. 224174 B. 425174 C. 17325 D. 225174 Answer Report Discuss Option: D Explanation : Click on Discuss to view users comments. srikanth said: (7:05am on Sunday 2nd June 2013) 12A7c = 0001 0010 1010 0111 1100 2 2 5 1 7 4 = x Write your comments here:
12:

What is the binary equivalent of Gray code 11100?

13:   A logic circuit which is used to change a BCD number into an equivalent decimal number is
 A. Decoder B. Encoder C. Multiplexer D. Demultiplexer Answer Report Discuss Option: A Explanation : Click on Discuss to view users comments. Write your comments here:
14:

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 Report Discuss Option: 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)   Click on Discuss to view users comments. Mayank said: (11:29pm on Wednesday 12th July 2017) why isn't excess 3 ?? ..excess 3 code is also a self complimentry code. Write your comments here:
15:   The binary equivalent of the hexadecimal number 7BD is
 A. 01111 0111101 B. 111010111111 C. 1011101111101 D. None of these Answer Report Discuss Option: A Explanation : Click on Discuss to view users comments. Write your comments here:

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