Question

A full adder is to be implemented using half adders and OR gates. A 4 bit parallel adder without any initial carry requires

a.

8 half adders and 4 OR gates

b.

8 half adders and 3 OR gates

c.

7 half adders and 3 OR gates

d.

7 half adders and 4 OR gates

Answer: (c).7 half adders and 3 OR gates

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Q. A full adder is to be implemented using half adders and OR gates. A 4 bit parallel adder without any initial carry requires

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