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A _______ gate is used to detect the occurrence of an overflow.(a) NAND(b) XOR(c) XNOR(d) ANDThe question was posed to me at a job interview.My question is taken from Fast Adders topic in portion Arithmetic of Computer Architecture

Answer»

Correct option is (b) XOR

To EXPLAIN: The overflow is detected by cn^cn-1 (‘^’ indicates XOR OPERATION).



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