What is indicated when both inputs in an XNOR gate go high?

In digital electronics, the XNOR gate, which stands for Exclusive NOR, is a type of logic gate that outputs true or high when the number of true inputs is even. For a two-input XNOR gate, the output is high when both inputs are both high (true).

When both inputs are high (expressed in binary as 1 and 1), the truth table for the XNOR gate shows that the output is also high (1). This characteristic makes XNOR gates useful for applications where even parity detection is required, meaning if both inputs match (either both are 0 or both are 1), the output reflects that match.

In the context of the question, since both inputs going high results in the output being high, the correct answer is indeed that the output goes high. This behavior aligns perfectly with the defining function of an XNOR gate, making the answer correct.