An electronic logic gate whose output is logic 0 only when all inputs are logic 1 is:

A NAND (NOT-AND) gate produces an output of logic 0 only when all of its inputs are logic 1. In every other input combination, the output remains logic 1. This behavior makes the NAND gate the inverse of the AND gate.

The NAND gate is one of the most important logic gates in digital electronics because it is a universal gate. Any digital circuit, including all other logic gates, can be constructed using only NAND gates. This makes it widely used in the design of computer processors, memory circuits, and digital control systems.

By contrast, a NOR gate produces logic 1 only when all inputs are logic 0, while an AND gate produces logic 1 only when all inputs are logic 1. Therefore, the description in the question matches the behavior of a NAND gate.

Correct Answer: NAND.