フリー問題

問題文

A program must pick one of two values inside a single assignment, based on one boolean test. Which operator does that in one expression?

選択肢

1. The assignment automatically uses the logical negation operator inside a single expression.
2. The assignment automatically uses the remainder division notation inside a single expression.
3. The assignment automatically uses the compound addition expression inside a single expression.
4. The assignment automatically uses the conditional selection form inside a single expression.