ISRO2008-28

Question

Which of the following is not a valid rule of $\textsf{XOR}?$

• A. $\textsf{0 XOR 0 = 0}$
• B. $\textsf{1 XOR 1 = 1}$
• C. $\textsf{1 XOR 0 = 1}$
• D. $\textsf{B XOR B = 0}$

Answer 1

Answer is B

XOR only gives 1 when inputs are 10 are 01

X  Y   X xor Y

0   0   0

1   1  0 

0    1  1

1  0    1

Answer 2

Answer : B

It should be   1 XOR 1 = 0

Answer 3

output of xor is high when there is odd number of 1's and low when even number of 1's

so option B is wrong 1 XOR 1=0(is true)

Answer 4

consider for 2 variable in XOR gate gives 1 if inputs are different(),gives 0 if inputs are same

so option b is correct