单项选择题

Given:

What is the result?（）

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

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单项选择题

A.B
B.B, followed by an Exception.
C.Compilation fails due to an error on line 9.
D.Compilation fails due to an error on line 14.
E.An Exception is thrown with no other output.

单项选择题

Given: What is the result?（）

A.6
B.7
C.10
D.11
E.Compilation fails.
F.An exception is thrown at runtime.