Calculate the binary addition: 1010 plus 0101.

Calculate the binary addition: 1010 plus 0101.

• A. 1010
• B. 1101
• C. 1111
• D. 10001

Answer: (C)

Binary addition uses base 2, where adding two bits can give 0, 1, or require a carry to the next position when both bits are 1. Align the numbers as 1010 and 0101 and add from the rightmost bit. 0 plus 1 equals 1, with no carry. Next column: 1 plus 0 equals 1, no carry. Next: 0 plus 1 equals 1, no carry. Leftmost: 1 plus 0 equals 1, no carry. The result is 1111, which is 15 in decimal.

Binary addition uses base 2, where adding two bits can give 0, 1, or require a carry to the next position when both bits are 1. Align the numbers as 1010 and 0101 and add from the rightmost bit. 0 plus 1 equals 1, with no carry. Next column: 1 plus 0 equals 1, no carry. Next: 0 plus 1 equals 1, no carry. Leftmost: 1 plus 0 equals 1, no carry. The result is 1111, which is 15 in decimal.