A.Alpha a = x;B.Foo f = (Delta)x;C.Foo f = (Alpha)x;D.B……

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.

单项选择题Given: If class Donkey is invoked twice, the first time without assertions enabled, and the second time with assertions enabled, what are the results?（）

A. no output
B. no output  assert is on
C. assert is on
D. no output An AssertionError is thrown.
E. assert is on An AssertionError is thrown.

单项选择题Given: What is the result when method testIfA is invoked?（）

A.True
B.Not true
C.An exception is thrown at runtime.
D.Compilation fails because of an error at line 12.
E.Compilation fails because of an error at line 19.