Question

In a given circuit as shown the two input waveform A and B are applied simultaneously. The resultant waveform Y (in shape) is

• A.
  
• B.
  
• C.
  
• D.
  

Answer 1

The correct option is A

(1 = high, 0 = low)
Input to A is in the sequence, 1,0,1,0.
Input to B is in the sequence, 1, 0, 0, 1.
Sequence is inverted by NOT gate.
Thus inputs to OR gate becomes 0, 1, 0, 1 from A and 0,1,1,0 from B and output of OR gate becomes 0, 1, 1, 1
Since for OR gate 0 + 1 = 1.
Hence choice (a) is correct.