Question

The two’s complement of a binary number is obtained by adding what to its one’s complement?

• A. 1
• B. 0
• C. 10
• D. 11

Hint:

Two’s complement is widely used to represent negative numbers in binary, and it eliminates the need for separate subtraction hardware.

Answer 1

The Correct Option is A

Step 1: What is one’s complement?
The one’s complement of a binary number is obtained by flipping all the bits (changing 0 to 1 and 1 to 0). Step 2: How to get two’s complement?
The two’s complement is obtained by adding 1 to the one’s complement. This is the step where negative binary numbers are represented. Step 3: Example
For example, the one’s complement of 1100 is 0011. Adding 1 to this gives 0100, which is the two’s complement.