問題文
A type that lists a fixed group of named values is compiled. Which further declaration does the language put in place on its own for one of those values?
選択肢
- The language puts in place a helper routine that reads letters back into instances at run time and it does so ahead of what the body declares by hand.
- The language puts in place a shared unchangeable field of that very kind standing under its name and it does so ahead of what the body declares by hand.
- The language puts in place a count of how many declarations were set down in its header and it does so ahead of what the body declares by hand.
- The language puts in place a mutable holder that lets later code aim somewhere else and it does so ahead of what the body declares by hand.