Q. 35 When two 8-bit numbers A7 … A and B7 … B in 2’s complement representation (with A and B as the least significant bits) are added using ripple-carry adder. the sum bits obtained are S7 … S and the carry bits are C7 … C. An overflow is said to have occured if
(A) the carry bit C7 is 1
(B) all the carry bits (C7, … , C ) are 1
(C) (A7 . B7 . S7‘ + A7‘ . B7‘ . S7) is 1
(D) (A . B . S‘ + A‘ . B‘ . S) is 1
Answer: (C)
Explanation:
