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Digital Logic
Boolean Algebra & Minimization
GATE 2012
Easy

The truth table

X | Y | f(X,Y) 0 | 0 | 0 0 | 1 | 0 1 | 0 | 1 1 | 1 | 1

represents the Boolean function

  • X
  • BX + Y
  • CX ⊕ Y
  • DY

Explanation

f(X,Y) equals 1 exactly when X=1 (rows X=1,Y=0 and X=1,Y=1), and equals 0 whenever X=0, regardless of Y. So f(X,Y) = X.

Source: GATE CS 2012 (2012)

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