フリー問題

問題文

You say which piece of the language reaches into one collection, and which transformation must sit on a particular sort of object. Which pair completes this sentence correctly?

選択肢

1. what the transformation language gives you for reaching an element of a map is a subscript operator, and the transformation that must be based on a complex file data object is the Rank transformation
2. what the transformation language gives you for reaching an element of a map is a subscript operator, and the transformation that must be based on a complex file data object is the Read transformation
3. what the transformation language gives you for reaching an element of a map is a reference operator, and the transformation that must be based on a complex file data object is the Read transformation
4. what the transformation language gives you for reaching an element of a map is a reference operator, and the transformation that must be based on a complex file data object is the Rank transformation