Which logic gate outputs the inverse of the input value?

Which logic gate outputs the inverse of the input value?

• A. And
• B. Not
• C. Or
• D. Nand

Answer: (B)

Inversion of a binary signal is what’s being tested here. The Not gate, also called an inverter, outputs the opposite value of its input. If you feed it 0, you get 1; if you feed it 1, you get 0. This single-input negation is what sets it apart from the others. And gate only turns on (outputs 1) when all inputs are 1, Or gate turns on if any input is 1, and Nand is the negation of And (it outputs 1 except when both inputs are 1). None of those produce the opposite of a single input’s value the way a Not gate does.

Inversion of a binary signal is what’s being tested here. The Not gate, also called an inverter, outputs the opposite value of its input. If you feed it 0, you get 1; if you feed it 1, you get 0. This single-input negation is what sets it apart from the others.

And gate only turns on (outputs 1) when all inputs are 1, Or gate turns on if any input is 1, and Nand is the negation of And (it outputs 1 except when both inputs are 1). None of those produce the opposite of a single input’s value the way a Not gate does.