ISRO | ISRO CS 2020 | Question 3

The following circuit compares two 2-bit binary numbers, X and Y represented by X1X0 and Y1Y0 respectively. (X0 and Y0 represent Least Significant Bits)

Under what condition Z will be 1 ?
(A) X > Y
(B) X < Y

(C) X = Y
(D) X! = Y


Answer: (A)

Explanation: Given, expression is,

Z = X1Y1' + (X1⊙Y1)X0Y0'

Therefore, if X > Y, then Z is 1.

Option (A) is correct.

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