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Boolean Algebra and Logic Simplification - Technical MCQs

Q1:

An AND gate with schematic "bubbles" on its inputs performs the same function as a(n)________ gate.

A NOT

B OR

C NOR

D NAND

ANS:C - NOR

For bubbled input to AND gate;
A B (A' . B')
0 0 1
0 1 0
1 0 0
1 1 0


And for NOR gate;
A B (A+B)'
0 0 1.
0 1 0.
1 0 0.
1 1 0.

So bubbled AND will have the same output as that of NOR gate.