Digital Electronics
What is the logic which controls a stair case light associated with two switches A and B located at the bottom and top of the stair case respectively?

 X-OR
 X-NOR
 AND
 OR

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Digital Electronics
In K-map simplification, a group of four adjacent 1s leads to a term with

 three literals less than the total number of variables
 two literals less than the total number of variables
 one literal less than the total number of variables
 four literals less than the total number of variables

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