Previous Year Question

Correct Answer

D — several data inputs, one data output and selection inputs

Concept and Reasoning

A multiplexer is a data selector. It accepts several data inputs, uses select lines to choose one of them, and sends the selected data to a single output. Therefore option D is correct.

Calculation / Key Relation

2^n data inputs require n select lines and produce one selected output

Exam Takeaway

MUX = many inputs to one output.

Common Mistake

Do not confuse a multiplexer with a demultiplexer, which routes one input to one of many outputs.