PCPP-32-101 1.7 Understand Attribute Encapsulation PCPP-32-1 Practice Questions (Page 4)

Questions 16–17

1. 16foundation · easy

   What is the purpose of a deleter method in an encapsulated class?

   • ATo make the attribute public.
   • BTo safely delete or reset an encapsulated attribute, ensuring proper cleanup.
   • CTo modify the value of a private attribute.
   • DTo retrieve the value of a private attribute.
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2. 17expert · hard

   A `Rectangle` class has `_width` and `_height` attributes. The setter for `_width` must ensure that the width is positive and that the area (width × height) does not exceed 1000. The setter for `_height` has the same constraint. What is the best way to implement this?

   • AValidate only in the `__init__` method.
   • BValidate only in the setter for `_width`.
   • CIn each setter, validate that the new value is positive and that the resulting area does not exceed 1000.
   • DMake `_width` and `_height` public and validate in the code that uses the class.
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