单项选择题
A.r， t， t，
B.r， e， o，
C.Compilation fails.
D.An exception is thrown at runtime.
单项选择题 Given： Which code fragment， inserted at the end of line 12， produces the output p is 420？（）
单项选择题 Given： When line 15 is reached， how many objects are eligible for the garbage collector？（）
单项选择题 Given： Which statement is true about the objects referenced by snoog， snooch， and booch immediately after line23 executes？（）
