1.

Let A and B is the input of a subtractor then the borrow will be ___________(a) A AND B’(b) A’ AND B(c) A OR B(d) A AND BThe question was posed to me during an internship interview.Question is taken from Half & Full Subtractor topic in section Arithmetic Circuits of Digital Circuits

Answer»

The correct answer is (b) A’ AND B

The BEST explanation: The BORROW of a subtractor is received through AND gate whose ONE input is inverted. On that BASIS the borrow will be (A’ AND B).



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