Which number system is used in the standard 8421 BCD code?

Options

  • A. Pure binary representation
  • B. Weighted binary representation
  • C. Gray code representation
  • D. Excess-3 representation
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

B. Weighted binary representation

Detailed Explanation

Correct Answer: (B) Weighted binary representation
8421 BCD is a weighted code. Its four bit positions have weights 8, 4, 2 and 1. For example, 0101 represents 5 because 4 + 1 = 5.