What is the binary sum of 0 and 0?

• A. 0
• B. 1
• C. 2
• D. 10

Answer: (A)

Binary addition is adding two bits using base 2. When both bits are 0, their sum is 0 and there’s no carry to the next position. So 0 plus 0 equals 0, and the binary representation of the sum is simply 0. The other choices would require a 1 in the sum or a carry to produce a value like 1 (which would be 1 in binary) or 10 (which is binary for 2). Here, since there’s no carry and both bits are 0, the result is 0.