BCD code has always how many bits per number

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IPRC (ISRO) Technician B (Electronic Mechanic): Previous Year Paper (Held on 10 Dec 2016)
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  1. 2
  2. 4
  3. 8
  4. 16

Answer (Detailed Solution Below)

Option 2 : 4
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Detailed Solution

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  • BCD (Binary Coded Decimal) is simply the 4-bit binary code representation of a decimal digit.
  • Each decimal digit replaced in the integer and fractional parts by its binary equivalent.
  • BCD Code uses four bits to represent the 10 decimal digits of 0 to 9.
  • BCD code is often called 8421 because the BCD is a weighted code and the weights used in binary coded decimal code are 8, 4, 2, 1.
  •  

    The following represents the 4-bit binary representation of decimal values: 

    Decimal Symbol

     

    BCD Digit

    0

    0000

    1

    0001

    2

    0010

    3

    0011

    4

    0100

    5

    0101

    6

    0110

    7

    0111

    8

    1000

    9

    1001

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