The logic operations of two combinational circuits in Figure-I and Figure-II are

(A) entirely different
(B) identical
(C) complementary
(D) dual


Answer: (A)

Explanation: The Two functions are entirely different as:

Figure 1: The logic gates derive the following function:

F1 = ((X + Y\')\' + X)\'
   = ((X + Y\')\')\'. X\'
   = (X + Y\'). X\'
   = XX\' + X\'Y\'
   = X\'Y\'

Figure 2: It is simple AND gate which has 1 input already complimented.

F2 = XY\'

So, these two functions are entirely different.


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