Which represents NAND gate

1. 

2. 

3. 

4. 

What will be the input of A and B for the Boolean expression $\overline{\left(\mathrm{A}+\mathrm{B}\right)}·\left(\overline{\mathrm{A}·\mathrm{B}}\right)=1$

(1) 0, 0

(2) 0, 1

(3) 1, 0

(4) 1, 1

If A and B are two inputs in AND gate, then AND gate has an output of 1 when the values of A and B are

(1) A = 0, B = 0

(2) A = 1, B = 1

(3) A = 1, B = 0 

(4) A = 0, B = 1

The Boolean equation of NOR gate is 

(1) C = A + B

(2) $\mathrm{C}=\overline{\mathrm{A}+\mathrm{B}}$ 

(3) $C=A·B$ 

(4) $\mathrm{C}=\overline{\mathrm{A}.\mathrm{B}}$

This symbol represents 

(1) NAND gate

(2) OR gate

(3) AND gate

(4) NOR gate

Symbol 

(1) NAND gate

(2) NOR gate

(3) NOT gate

(4) XNOR gate

To get an output 1 from the circuit shown in the figure, the input must be 

(1) A = 0, B = 1, C = 0

(2) A = 1, B = 0, C = 0

(3) A = 1, B = 0, C = 1

(4) A = 1, B = 1, C = 0

The combination of the gates shown in the figure below produces 

(1) NOR gate

(2) OR gate

(3) AND gate

(4) XOR gate

Which logic gate is represented by the following combination of logic gates 

(1) OR

(2) NAND

(3) AND

(4) NOR

The output of the OR gate is 1 

(1) If both inputs are zero

(2) If either or both inputs are 1

(3) Only if both inputs are 1

(4) If either input is zero