# Digital-Grand Test -Q4

+1 vote

Assume you need a 64-to-1 multiplexer controlled by 6 select signals A through F, i.e., a binary number ABCDEF specifies the index of the input to be sent to the output. However, as we assume a logic gate can not have more than 8 inputs, such a MUX is not directly available. So you build this 64-to-1 MUX using 4-to-1 mux, such that minimum number of 4-to-1 mux are used.  We build this 64-to-1 MUX using three levels of 4-to-1 MUXs where level 3 has one 4-to-1 mux and its output is the output of the original 64-to-1 mux.

The realization of this 64-to-1 mux using three levels of 4-to-1 muxes is such that Level i (i = 1,2,3) is controlled by select signals i.e. In level i, the most significant select line of each 4-to-1 mux is connected to and the least significant control line of each 4-to-1 mux is connected to .

To select input 27 i.e. (ABCDEF = 011011) and send it to the output, the value of should be

(A). 011011

(B). 110110

(C). 111001

(D). 100111 asked Jun 10 in Digital
reshown Jun 12 answered Jun 25 by (112,760 points)