Which of the gates is represented by above?

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

If A and B are input wave forms for given combination of logic gates then output waveform
will be :-

Find output Y :-

The logic circuit shown below has the input waveforms ‘A’ and ‘B’ as shown. Pick out the
correct output waveform.

To get an output 1 from the circuit shown in the figure, the input may be :-

The combination of ‘NAND’ gates shown here under (figure) are equivalent to

The following configuration of gate is equivalent to

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 :-

Figure gives a system of logic gates. From the study of truth table it can be found that to produce a high output (1) at R, we must have :