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

   

1. OR
2. NAND
3. AND
4. NOR

The figure shows a logic circuit with two inputs A and B and the output C. The voltage waveforms across A, B, and C are as given. The logic circuit gate is:
   

1. OR gate

2. NOR gate

3. AND gate

4. NAND gate

To get output Y = 1 in the given circuit which of the following input will be correct:

The symbolic representation of four gates is shown as: 
   
Pick out which ones are for AND, NAND, and NOT gates, respectively.

To get an output Y = 1 from the circuit shown below, the input must be:

1. A=0 B=1 C=0

2. A=0 B=0 C=1

3. A=1 B=0 C=1

4. A=1 B=0 C=0

The following figure shows a logic gate circuit with two inputs A and B, and the output Y. The voltage waveforms of A, B and Y are as given.
 

The logic gate is:

1. OR gate

2. AND gate

3. NAND gate

4. NOR gate

The symbolic representation of four logic gates are as shown:
(i) 
(ii) 
(iii) 
(iv) 
The logic symbols for OR, NOT and NAND gates are respectively:
1. (iii), (iv), (ii)
2. (iv), (i), (iii)
3. (iv), (ii), (i)
4. (i), (iii), (iv)

The circuit is equivalent to: 
        

1.  AND gate

2.  NAND gate

3.  NOR gate

4.  OR gate

In the following circuit, the output Y for all possible inputs A and B is expressed by the truth table: