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A full adder combinational circuit has
  • a)
    3 inputs and 2 outputs 
  • b)
    2 inputs and 0 outputs 
  • c)
    1 input and 0 output 
  • d)
    4 inputs and 1 output
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
A full adder combinational circuit hasa)3 inputs and 2 outputsb)2 inpu...
The basic block diagram for a Full Adder is as shown:

A Full adder can be realized using two half adders as shown:

 
We, therefore, conclude that a full adder combinational circuit has 3 inputs and 2 outputs.
A full adder can be implemented using 2 XOR, 2 AND, 1 OR as shown in figure:

Important Point
The truth table of a full adder logic is:

S = A ⊕ B ⊕ C
The Sum output bit of a full adder is given by:
The carry output bit of a full adder is given by:
X1 = AB + BC + AC
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A full adder combinational circuit hasa)3 inputs and 2 outputsb)2 inputs and 0 outputsc)1 input and 0 outputd)4 inputs and 1 outputCorrect answer is option 'A'. Can you explain this answer?
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