Question

Number of '1' in 2's complement representation of ${(-89)}_{10}$ is _________.

• A. 5

Answer 1

The correct option is A 5
5

Binary representation of ${\left(89\right)}_{10}$= $\left(01011001\right)$

${(-89)}_{10}=$ 2's complement of $\left(01011001\right)$

So, 2's complement of $\left(01011001\right)=\left(10100110\right)+\left(1\right)$

Number of 1's =5