フリー問題

問題文

When does an object become eligible for reclamation by the collector?

選択肢

1. Eligibility begins once every named handle disappears, and the exact removal moment stays undefined to the program.
2. Eligibility begins once every reachable handle disappears, and the exact removal moment stays undefined to the program.
3. Eligibility begins once every reachable handle disappears, and the exact removal moment stays exposed to the program.
4. Eligibility begins once every named handle disappears, and the exact removal moment stays exposed to the program.