In a functional logic gate circuit, the output will be 0 when

In a functional logic gate circuit, the output will be 0 when

• A. Only when all inputs are 0.
• B. When one input is 0.
• C. When all inputs are 1.
• D. When one or more inputs are 0.

Answer: (D)

In a circuit with an AND gate, the output is high only when every input is high. If any input is low, the output goes low. So the output will be 0 whenever one or more inputs are 0, including cases where exactly one input is 0 or several inputs are 0. If all inputs were 1, the output would be 1, not 0. This is why the correct condition is that at least one input is 0.

In a circuit with an AND gate, the output is high only when every input is high. If any input is low, the output goes low. So the output will be 0 whenever one or more inputs are 0, including cases where exactly one input is 0 or several inputs are 0. If all inputs were 1, the output would be 1, not 0. This is why the correct condition is that at least one input is 0.