question_answer

The real time variation of input signals A and B are as shown below. If the inputs are fed into NAND gate, then select the output signal from the following.

A)

B)

C)

D)

E)

Correct Answer: B

Solution :

From real time variation of input signals, we can form truth table for A and B and conclude output from NAND gate

Input		Output
A	B	Y
0	0	1
1	0	1
0	0	1
1	1	0
0	0	1

From output, we can show real time variation of output signal as below