How many different BCD numbers can be stored in 12 switches? (Assume two…
2014
How many different BCD numbers can be stored in 12 switches? (Assume two position or on-off switches)
- A.
212
- B.
212-1
- C.
1012
- D.
103
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Correct answer: D
Each switch represents 1 bit, so 12 switches provide 12 bits. BCD uses 4 bits per decimal digit, allowing storage of 3 digits (12 ÷ 4 = 3). Each decimal digit has 10 possible values (0-9), resulting in 10^3 different BCD numbers.