单项选择题
Given:
Which code, inserted at line 16, will cause a java.lang.ClassCastException?（）
A.Alpha a = x;
B.Foo f = (Delta)x;
C.Foo f = (Alpha)x;
D.Beta b = (Beta)(Alpha)x;
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相关考题
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单项选择题
Given: What is the result?（）
A.null
B.finally
C.null finally
D.Compilation fails.
E.finally exception -
单项选择题
Given: What is the result when the go() method is invoked?（）
A.00
B.0001
C.000120
D.00012021
E.Compilation fails.
F.An exception is thrown at runtime. -
多项选择题
Given: Under which three circumstances will the code on line 37 be executed?（）
A.The instance gets garbage collected.
B.The code on line 33 throws an exception.
C.The code on line 35 throws an exception.
D.The code on line 31 throws an exception.
E.The code on line 33 executes successfully.
