Which gate inverts its input so that true becomes false and false becomes true?

Which gate inverts its input so that true becomes false and false becomes true?

• A. AND gate
• B. OR gate
• C. XOR gate
• D. NOT gate

Answer: (D)

In digital logic, an inverter performs negation. A NOT gate takes a single input and outputs the opposite value. If the input is true, the output is false; if the input is false, the output is true. This exact flipping behavior matches the description in the question. The other gates combine inputs without inverting: AND outputs true only when both inputs are true, OR outputs true if at least one input is true, and XOR outputs true when exactly one input is true. Because only the NOT gate flips the input, it is the one that inverts.

In digital logic, an inverter performs negation. A NOT gate takes a single input and outputs the opposite value. If the input is true, the output is false; if the input is false, the output is true. This exact flipping behavior matches the description in the question. The other gates combine inputs without inverting: AND outputs true only when both inputs are true, OR outputs true if at least one input is true, and XOR outputs true when exactly one input is true. Because only the NOT gate flips the input, it is the one that inverts.