It takes three 2-1 MUX's to build a 4-1 MUX. How many 2-1 MUX's does it take to build an 8-1 MUX?
4 |
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5 |
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6 |
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7 |
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none of these |
Answer:7
By solving it we get 7 as answer
It is nothing but
N1=required mux that is 8
N2= available mux that is 2
We have taken if from 8*1 and 2*1mux
First we have to do 8/2=4
Then we have to take the result that is and again divide by 2
4/2 =2
and again divide 2/2=1
Add them that is 4+2+1=7
We require 7. 2*1 mux to build 8*1 mux
Refer this image for more clarification
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