How many invalid combinations are present in a 4-bit 8421 BCD code?
Options
- A. 4
- B. 5
- C. 6
- D. 8
- E. None of the above
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Quiz Practice:
Correct Answer (Detailed Explanation is Below)
C. 6
Detailed Explanation
Correct Answer: (C) 6Four bits can represent 2⁴ = 16 combinations. Only 10 combinations (0000 to 1001) are valid in 8421 BCD. Therefore, invalid combinations = 16 - 10 = 6.