A) only if both inputs are zero
B) if either or both inputs are 1
C) only if both inputs are 1
D) if either input is zero
Correct Answer: B
Solution :
| OR gate has two inputs A and B and a output Y. It follows a logic operation represented by \['+'\]. Thus, its Boolean expression is | ||||||
| \[A+B=Y\] | ||||||
| The truth table of OR gate is | ||||||
| ||||||
| Thus, after observing its Boolean expression and its truth table, it is obvious that output of OR gate is 1 if either or both inputs are 1. |
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