A multiplexer is a combinational circuit that selects binary information from one of many input lines and directs it to a single output line. The selection of a particular input line is controlled by a set of selection lines. Normally, there are 2^n input lines and n selection lines whose bit combinations determine which input is selected.
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1-bit magnitude comparator - https://youtu.be/3BiSCqXXGo0
parity generator in hindi - https://youtu.be/iqzNfHzxugM
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