Which of the following statements is INCORRECT about BCD adder?
2022
Which of the following statements is INCORRECT about BCD adder?
- A.
It is a used to add two decimal digits in BCD.
- B.
It has 9 input lines.
- C.
It has 5 output lines.
- D.
Its output should be a decimal digit that need not be in BCD.
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Correct answer: D
A BCD adder is a digital circuit designed to add two decimal digits encoded in Binary Coded Decimal format. It typically processes nine input lines representing two 4-bit numbers and a carry-in, generating five output lines for the sum and carry. Crucially, the final result must always be a valid BCD digit to maintain decimal accuracy in subsequent processing. Therefore, any statement suggesting the output need not be in BCD is factually incorrect.