In the expression a % b, which part represents the divisor?

• A. a
• B. b
• C. a % b
• D. modulus

Answer: (B)

The idea being tested is how the modulus operation works: a % b gives the remainder after dividing a by b. The divisor is the number you divide by, which is b. In this expression, a is the dividend (the value being divided), b is the divisor, and the result is the remainder. The term modulus refers to the operation itself, not to either operand or the result. For example, 7 % 3 equals 1, illustrating that 3 is the divisor and the remainder is 1.