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How many NAND gates are required to make an XOR gate?(a) 7(b) 12(c) 4(d) 8I have been asked this question during an interview.My doubt stems from Boolean Algebra in chapter Boolean Algebra and Modeling Computations of Discrete Mathematics

Answer»

Right answer is (C) 4

Easiest explanation: An XOR gate is created by USING four NAND gates. This construction gives a propagation DELAY three times to that of a single NAND gate.



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