A 2-input NOR gate produces an output that is true (1) only when both of its inputs are false (0). Here is the truth table for a 2-input NOR gate:
| A | B | Output (A NOR B) | |---|---|------------------| | 0 | 0 | 1 | | 0 | 1 | 0 | | 1 | 0 | 0 | | 1 | 1 | 0 |
In summary, the output is 1 only when both inputs A and B are 0. In all other cases, the output is 0.