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Total number of inputs in a half adder is __________(a) 2(b) 3(c) 4(d) 1The question was asked at a job interview.My question comes from Half Adder & Full Adder in division Arithmetic Circuits of Digital Circuits

Answer»

The CORRECT ANSWER is (a) 2

Easiest explanation: Total number of inputs in a HALF ADDER is two. SINCE an EXOR gates has 2 inputs and carry is connected with the input of EXOR gates. The output of half-adder is also 2, them being, SUM and CARRY. The output of EXOR gives SUM and that of AND gives carry.



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