Can a multiplexer be used to realize a logic function?

Yes, a multiplexer (MUX) can be used to realize a logic function. By appropriately selecting the inputs and control signals of the MUX, it can generate the desired output for any given combination of input variables. Essentially, a MUX can be configured to implement any logic function by using its data inputs to represent the truth table of that function. This makes it a versatile tool in digital circuit design.