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Review Questions on Python Encapsulation – Test Your OOP Understanding


Reinforce your understanding of encapsulation in Python with these structured review questions. Ideal for students and self-learners to assess their grasp of object-oriented concepts like access control, private variables, and class design.

🔍 Review Questions

  1. What is the main purpose of encapsulation in Python?

  2. Answer

    To protect an object's internal state from direct external access and modification.

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  3. What does a single underscore prefix (e.g., `_variable`) indicate in Python?

  4. Answer

    It indicates a protected variable that should only be accessed within the class or its subclasses (convention only).

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  5. What is name mangling in Python?

  6. Answer

    When Python changes a variable name (e.g., `__var` becomes `_ClassName__var`) to make it harder to access outside its class.

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  7. What is the purpose of getter and setter methods?

  8. Answer

    To control access to private attributes and add validation logic when getting/setting values.

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  9. What does the `@property` decorator do?

  10. Answer

    It allows you to define methods that can be accessed like attributes while maintaining control over the access.

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  11. How do you make a read-only property in Python?

  12. Answer

    By using the `@property` decorator without defining a setter method.

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