Number Representation

Question 1
 
A
1 only
B
2 only
C
3 only
D
1 and 3 only
       Digital Logic Design       Number Representation       Gate 2004-IT
Question 1 Explanation: 
In 2's complement arithmetic, overflow happens only when
1) Sign bit of two input numbers is 0, and the result has sign bit 1.
2) Sign bit of two input numbers is 1, and the result has sign bit 0.
So, only (2) causes overflow.
There is 1 question to complete.