The output of a 2 input OR gate is 0 only when its

The correct answer is: A. both inputs are 0.

An OR gate is a digital logic gate that implements logical disjunction (inclusive OR). It produces a true output (1) if either or both of its inputs are true (1). If both inputs are false (0), the output is false (0).

Here is a truth table for a 2-input OR gate:

| Input A | Input B | Output | |---|---|---| | 0 | 0 | 0 | | 0 | 1 | 1 | | 1 | 0 | 1 | | 1 | 1 | 1 |

As you can see, the output is only 0 when both inputs are 0.