Which type of logic gate outputs true only if all its inputs are true?

The type of logic gate that outputs true only if all its inputs are true is the AND gate. The fundamental operation of an AND gate is predicated on the necessity for every input to be in the true (or high) state for it to yield a true output. If any of the inputs provided to the AND gate are false (or low), the output will also be false. This characteristic makes the AND gate critical in scenarios where condition satisfaction is required across multiple inputs, such as in digital circuits that need multiple criteria to be met to proceed with an operation or signal.

In contrast, the NOR gate outputs true only when all inputs are false, while the OR gate outputs true if at least one input is true. The XOR (exclusive OR) gate outputs true if an odd number of inputs are true but will yield false if all inputs are the same. Understanding these distinctions clarifies why the AND gate is specifically known for its all-true condition for outputting true.