$Remark:$

if the sign bit of both the signed numbers is not same as the sign bit of the product, then there is an overflow.

if the sign bit of both the signed numbers is not same as the sign bit of the product, then there is an overflow.

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(a) In 2's complement addition Overflow happens only when :

- Sign bit of two input numbers is 0, and the result has sign bit 1.
- Sign bit of two input numbers is 1, and the result has sign bit 0.

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