单项选择题

Given：

And the following five fragments：
public static void main（String...a） {
public static void main（String.* a） {
public static void main（String... a） {
public static void main（String[]... a） {
public static void main（String...[] a） {
How many of the code fragments， inserted independently at line 2， compile？（）

A.0
B.1
C.2
D.3
E.4

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单项选择题

Click the Exhibit button.

What is the result？（）

A.4321
B.0000
C.An exception is thrown at runtime.
D.Compilation fails because of an error in line 18.

单项选择题

Click the Exhibit button.

Which statement is true about the classes and interfaces in the exhibit？（）

A.Compilation will succeed for all classes and interfaces.
B.Compilation of class C will fail because of an error in line 2.
C.Compilation of class C will fail because of an error in line 6.
D.Compilation of class AImpl will fail because of an error in line 2.

单项选择题

Given：

Which code， inserted at line 14， allows the Sprite class to compile？（）

A.Direction d = NORTH；
B.Nav.Direction d = NORTH；
C.Direction d = Direction.NORTH；
D.Nav.Direction d = Nav.Direction.NORTH；