单项选择题

Given:10. interface Data { public void load(); }11. abstract class Info { public abstract void load(); }Which class correctly uses the Data interface and Info class?（）（）

A.
B.
C.
D.
E.
F.

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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;

单项选择题

Given: Which code, inserted at line 15, creates an instance of the Point class defined in Line?（）

A.Point p = new Point();
B.Line.Point p = new Line.Point();
C.The Point class cannot be instatiated at line 15.
D.Line l = new Line() ; l.Point p = new l.Point();