Match the columns.
Logic Gates 

Symbol 
Description 
1. 
a. OR Gate 
2. 
b. XOR Gate 
3. 
c. NOR Gate 
4. 
d. AND Gate 
Concept:
AND Gate: The Logic AND Gate is a type of digital logic circuit whose output goes 1 (HIGH) only when all of its inputs are 1 (HIGH)
Or,
Inverted input NOR Gate
\(\overline {\bar A + \bar B} = A.B\)
A  B  C = A . B 

0  0  0 
0  1  0 
1  0  0 
1  1  1 
OR Gate: The Logic OR Gate is a type of digital logic circuit whose output goes HIGH to a logic level 1 only when one or more of its inputs are HIGH
Or,
Inverted input NAND Gate
\(\overline {\bar A.\bar B} = A + B\)
A  B  C = A + B 

0  0  0 
0  1  1 
1  0  1 
1  1  1 
XOR GATE
Symbol:
Truth Table:
Input A 
Input B 
Output Y = A ⊕ B 
0 
0 
0 
0 
1 
1 
1 
0 
1 
1 
1 
0 
Output Equation: \(Y = {\bf{A}} \oplus {\bf{B}} = \bar AB + A\bar B\)
NOR gate: Output of this logic gate is true when both inputs are false.
Symbol:
Truth Table:
A 
B 
NAND 
NOR 
0 
0 
1 
1 
0 
1 
1 
0 
1 
0 
1 
0 
1 
1 
0 
0 