Topic: Digital Logic
A truth table will need how many rows if there are n variables?
- A. $2^{*}n$
- B. n
- C. 2n
- D. None of the above
Answer: D. None of the above
Explanation: A truth table for n binary variables requires exactly $2^{n}$ rows to account for all possible boolean combinations. Since $2^{n}$ is not explicitly listed in the options (as $2^{*}n$ translates to $2n$), 'None of the above' is the strictly correct choice.