单项选择题

Given:

What is the result?（）

A.The value "4" is printed at the command line.
B.Compilation fails because of an error in line 5.
C.Compilation fails because of an error in line 9.
D.A NullPointerException occurs at runtime.
E.A NumberFormatException occurs at runtime.
F.An IllegalStateException occurs at runtime.

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单项选择题

Click the Exhibit button. Given:Which statement is true if a TestException is thrown on line 3 of class B? （）

A.Line 33 must be called within a try block.
B.The exception thrown by method1 in class A is not required to be caught.
C.The method declared on line 31 must be declared to throw a RuntimeException.
D.On line 5 of class A, the call to method2 of class B does not need to be placed in a try/catch block.

单项选择题

Given:

What is the result?（）

A.collie
B.harrier
C.Compilation fails.
D.collie harrier
E.An exception is thrown at runtime.

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.

Given: What is the result?（）

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Given:

What is the result?（）