practise logic gates

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

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

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

The Fig shown input waveforms A and B to a logic gate. Draw the output waveform for an OR gate. Write the truth table for this logic gate and draw its logic symbol.

What is logic gate? Distinguish between AND and OR gates.

What is a logic gate name the logic gate obtained from the figure and write its truth table

Figure shows a combination of logic gates. To what single gate is this combination equivalent?

What is a logic gate? Draw the symbol and give the truth table for NOT gate. Why NOT gate is called inverter?