A.collieB.harrierC.Compilation fails.D.collie harrierE.……

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.

单项选择题Given: What is the result?（）

A.test
B.Exception
C.Compilation fails.
D.NullPointerException

单项选择题Given: What is the result?（）

A.Compilation fails.
B.pi is bigger than 3.
C.An exception occurs at runtime.
D.pi is bigger than 3. Have a nice day.
E.pi is not bigger than 3. Have a nice day.

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?（）

A.Compilation fails due to an error in line 23.
B.Compilation fails due to an error in line 29.
C.A ClassCastException occurs in line 29.
D.A ClassCastException occurs in line 31.
E. The value of all four objects prints in natural order.