フリー問題

問題文

A developer checks two claims made in a design review. First, of two objects in the mapping, one is said to carry nothing but ports that both take in and give out, and the other is said to keep its settings out of reach of any override put in at run time. Second, the review asks which of two objects can be called from inside an expression when it is kept off the pipeline, and which one can never be called that way at all. Which pairing fits?

選択肢

1. The Sorter form carries nothing but ports that both take in and give out, and the Sequence Generator form keeps its settings out of reach of an override put in at run time, while the Lookup kind can never be called from inside an expression and the Custom kind can be called that way when it is kept off the pipeline.
2. The Sequence Generator form carries nothing but ports that both take in and give out, and the Sorter form keeps its settings out of reach of an override put in at run time, while the Lookup kind can never be called from inside an expression and the Custom kind can be called that way when it is kept off the pipeline.
3. The Sorter form carries nothing but ports that both take in and give out, and the Sequence Generator form keeps its settings out of reach of an override put in at run time, while the Custom kind can never be called from inside an expression and the Lookup kind can be called that way when it is kept off the pipeline.
4. The Sequence Generator form carries nothing but ports that both take in and give out, and the Sorter form keeps its settings out of reach of an override put in at run time, while the Custom kind can never be called from inside an expression and the Lookup kind can be called that way when it is kept off the pipeline.