Question
Which logic gate is represented by this following combination of logic gates?

-
OR
-
NAND
-
AND
-
NOR
Solution
C.
AND
The truth table for the given circuit is
A |
B |
y1 |
y2 |
y= y1 +y2 |
0 |
0 |
1 |
1 |
0 |
0 |
1 |
1 |
0 |
0 |
1 |
0 |
0 |
1 |
0 |
1 |
1 |
0 |
0 |
1 |
The truth table shows that both the inputs are high, then we are getting a high value of output otherwise zero. Hence, the combination represents AND gate.