My prof told me that these 2 questions were wrong on a test, but I fully disagree with him. Here are the questions
Which of the following is the most important drawback of the 1's complement method?
A) All cases
B) end-around-carry-bit (Carry-Out addition occurs in 1's complement arithmetic operations.
C) the design and implementation of digital circuits for calculations with this method are complicated.
D) O has two different representation one is -0 and second is +O
For this question, I chose "all cases", since the biggest disadvantage of using 1's complement is that there is indeed an end-around-carry, AND it has a +0 and a -0. I've also read that one's complement needs more computing power, thus, more complexity to be performed.
The second question was
Which of the following is the most important drawback of the Sign-Magnitude method?
A) 0 has two different representation one is -O and second is +0
B) All cases
C) Designing and implementing digital circuits to perform calculations through the Sign-Magnitude method is very complicated
D) It is challenging for humans to understand the Sign-Magnitude method
I chose "0 has 2 representations", since this is the biggest issue with sign-magnitude calculation (that's why we don't use it much anymore), and because of this issue, more circuits are required.
If I'm wrong, could you please explain why? Thank you so much and have a great day!
