4 bit 2's complement representation of a decimal number is 1000. The number is

A)
+ 8
B)
0
C)
-7
D)
- 8

Correct Answer : Option (D) :   - 8


Explanation : (a) and (d) both are option, But there is meaning to represent a positive number in 2's complement form, we take complement representation for negative number only. Therefore most appropriate number is "-8".