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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 given. The logic gate is

1. NAND gate
2. NOR gate
3. OR gate
4. AND gate

Correct answer: NAND gate

Solution

The output Y is high (1) for all cases except when both inputs A and B are high (1). This behavior corresponds to a NAND gate.

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