多項(xiàng)選擇題

What two must the programmer do to correct the compilation errors？（）

A.insert a call to this（） in the Car constructor
B.insert a call to this（） in the MeGo constructor
C.insert a call to super（） in the MeGo constructor
D.insert a call to super（vin） in the MeGo constructor
E.change the wheelCount variable in Car to protected
F.change line 3 in the MeGo class to super.wheelCount=3

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單項(xiàng)選擇題

A team of programmers is involved in reviewing a proposed design for a new utility class， After some discussion， they realize that the current design allows other classes to access methods in the utility class that should be accessible only to methods within the utility class itself. What design issue has the team discovered？（）

A.Tight coupling
B.Low cohesion
C.High cohesion
D.Loose coupling
E.Weak encapsulation
F.Strong encapsulation

多項(xiàng)選擇題

What are four valid examples of polymorphic method calls？（）

A.x.a2（）；
B.z.a2（）；
C.z.c1（）；
D.z.a1（）；
E.y.c1（）；
F.x.a1（）；

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What two must the programmer do to correct the compilation errors？（）

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What are four valid examples of polymorphic method calls？（）

What are four valid examples of polymorphic method calls？（）