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      Question

      Which of the following is a common mechanism to achieve

      abstraction in OOP?
      A Public methods Correct Answer Incorrect Answer
      B Private variables Correct Answer Incorrect Answer
      C Abstract classes and interfaces Correct Answer Incorrect Answer
      D Constructors Correct Answer Incorrect Answer
      E Static methods Correct Answer Incorrect Answer

      Solution

      Abstract classes and interfaces define a contract (what methods a class should have) without providing full implementation details, thereby enforcing abstraction. Public methods expose functionality, but don't inherently enforce abstraction as a design principle.

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