Question

What is the checksum code for 1011 1101 1001? A sender and a receiver agreed that they use 4-bit unit.

Answer 1

Answer is as follows :

We have 1011 1101 1001

we have three packets

as which is equal to hexadecimal and decimal as follows

1011 = B = 11

1101 = D = 13

1001 = 9 = 9

So we add all these = 11 + 13 + 9 = 33

so we get total of 33 in decimal.

and we have to use 4-bit checksum.

so total value will be 2⁴ = 16

so after divide 33 by 16 we get 1 as remainder.

and 1 is equal to 0001 in 4 bit binary. and hexadecimal value of 0001 is also 1.

So checksum is 0001 i.e. our 4-bit result.

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