Question

Figure gives a system of logic gates. From the study of truth table it can be found that to produce a high output (1) at R, we must have –

• A. X = 0, Y = 1
• B. X = 1, Y = 1
• C. X = 1, Y = 0
• D. X = 0, Y = 0

Answer 1

Answer: (C)

X = 1, Y = 0

Answer 2

* Output R = X $\bar{Y}$

* If R = 1 it is possible when X = 1 & Y= 0