单项选择题
Which line of code marks the earliest point that an object referenced by intObj becomes a candidate for garbage collection？（）
A.Line 16 B.Line 17 C.Line 18 D.Line 19 E.The object is NOT a candidate for garbage collection.
What is the result？（） A.harrierB.shepherdC.retrieverD.C...
What is the result？（）
A.harrier B.shepherd C.retriever D.Compilation fails E.retriever harrier F.An exception is thrown at runtime
When the doSomething method is called， after which line...
When the doSomething method is called， after which line does the Object created in line 5 become available for garbage collection？（）
A.Line 5 B.Line 6 C.Line 7 D.Line 8 E.Line 9 F.Line 10
What is the result？（） A.nullB.zeroC.someD.Compilation f...
A.null B.zero C.some D.Compilation fails. E.An exception is thrown at runtime.
