单项选择题

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

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单项选择题

What is the result？（）

A.null
B.zero
C.some
D.Compilation fails.
E.An exception is thrown at runtime.

多项选择题

Which two statements are true？（）

A.Foo.beta（） is a valid invocation of beta（）.
B.Foo.alpha（） is a valid invocation of alpha（）.
C.Method beta（） can directly call method alpha（）.
D.Method alpha（） can directly call method beta（）.

单项选择题

What is the result when the programmer attempts to compile the code and run it with the command java Converter 12？（）

A.It is true that j==i.
B.It is false that j==i.
C.An exception is thrown at runtime.
D.Compilation fails because of an error in line 13.