Classical

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

 
 

Option: D

Explanation :

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srikanth said: (7:05am on Sunday 2nd June 2013)
12A7c = 0001 0010 1010 0111 1100 2 2 5 1 7 4 = x

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12:  

What is the binary equivalent of Gray code 11100?

A.

11011

B.

10101

C.

00111

D.

10010

 
 

Option: D

Explanation :

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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
 
 

Option: A

Explanation :

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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

 
 

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)  

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Mayank said: (11:29pm on Wednesday 12th July 2017)
why isn't excess 3 ?? ..excess 3 code is also a self complimentry code.

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15:   The binary equivalent of the hexadecimal number 7BD is
A. 01111 0111101
B. 111010111111
C. 1011101111101
D. None of these
 
 

Option: A

Explanation :

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