- The XOR (Exclusive OR) gate produces a HIGH output only when its inputs are different (not the same, or not coincident)
Therefore, it is called the anticoincidence gate
- The XNOR (Exclusive NOR) gate produces a HIGH output only when its inputs are the same (coincident)
Therefore, it is called the coincidence gate
The question asks for anticoincidence and coincidence gates, respectively
This corresponds to XOR and XNOR