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Full subtractor is used to perform subtraction of ___________(a) 2 bits(b) 3 bits(c) 4 bits(d) 8 bitsThis question was posed to me during an interview for a job.My question is from Half & Full Subtractor in chapter Arithmetic Circuits of Digital Circuits

Answer»

Right answer is (b) 3 bits

To explain: Full subtractor is used to perform subtraction of 3 bits, namely minuend bit, subtrahend bit and borrow from the previous stage. HOWEVER, it also PRODUCES 2 OUTPUTS BORROW and DIFFERENCE.



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