フリー問題

問題文

In an Expression transformation a developer joins a branch code held as text to a figure held as digits, using the || operator, and is told that the operator will turn most kinds of value into text by itself before it joins them. One kind is left out of that promise. The same developer is then told that the transformation language keeps exactly two ways of marking a comment inside an expression, one of which is a pair of dashes, and has to name the other one. Which pair of statements is right?

選択肢

1. The one datatype that the || operator will not turn into text by itself is Number, and the other way of marking a comment inside an expression is a pair of accents.
2. The one datatype that the || operator will not turn into text by itself is Binary, and the other way of marking a comment inside an expression is a pair of slashes.
3. The one datatype that the || operator will not turn into text by itself is Binary, and the other way of marking a comment inside an expression is a pair of accents.
4. The one datatype that the || operator will not turn into text by itself is Number, and the other way of marking a comment inside an expression is a pair of slashes.