Java OCA OCP Practice Question 2389

Question

Examine the following code and select the correct option(s): 

public class Person { 
    public int height; 
    public void setHeight(int newHeight) { 
        if (newHeight <= 300) 
            height = newHeight; 
    } 
}
  • a The height of a Person can never be set to more than 300.
  • b The preceding code is an example of a well-encapsulated class.
  • c The class would be better encapsulated if the height validation weren't set to 300.
  • d Even though the class isn't well encapsulated, it can be inherited by other classes.


d

Note

This class isn't well encapsulated because its instance variable height is defined as a public member.

Because the instance variable can be directly accessed by other classes, the variable doesn't always use the method setHeight() to set its height.

The class Person can't control the values that can be assigned to its public variable height.




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