多项选择题
Which two code fragments are most likely to cause a StackOverflowError?（）
A. B. C. D. E. F.
多项选择题 Given: Which four code fragments, inserted independently at line 7, will compile? （）
单项选择题 Given: Which statement is true about the class of an object that can reference the variable base? （）
单项选择题 Given: What is the result?（）
