In 8086 the overflow flag is set when _____.?
(a) The sum is more than 16 bits
(b) Signed numbers go out of their range after an arithmetic operation
(c) Carry and sign flags are set
(d) Subtraction
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The answer for 8086 the overflow flag is b) set when Signed numbers go out of their range after an arithmetic operation .
The overflow flag is used to test if an integer overflows after the last operation. The overflow flag is set when it overflows to a low data value in memory. And this can happen if the memory address contains an unsigned long (unsigned integers have a limited range).
In 8086, the overflow flag is set when the result of an arithmetic operation does not fit in the range defined by a signed number. The overflow flag can be used to detect when you have overflowed a signed number after performing an arithmetic operation. For example, assume that you are trying to store a value of 12346789 into a variable with type int.