For a two-input AND gate with A = 1 and B = 0, the output is

For a two-input AND gate with A = 1 and B = 0, the output is

• A. 1
• B. 0
• C. X
• D. Unknown

Answer: (B)

An AND gate outputs a high only when both inputs are high. With A equal to 1 and B equal to 0, one input is low, so the conjunction is false and the output must be 0. This reflects the rule that both conditions must be true for the result to be high. Since the inputs are definitively known, there’s no indeterminate or unknown state, so the other possibilities don’t apply.

An AND gate outputs a high only when both inputs are high. With A equal to 1 and B equal to 0, one input is low, so the conjunction is false and the output must be 0. This reflects the rule that both conditions must be true for the result to be high. Since the inputs are definitively known, there’s no indeterminate or unknown state, so the other possibilities don’t apply.