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B3.1 Fundamentals of OOP for a single classB3.1.5

Encapsulation and Information Hiding

Explain and apply the concepts of encapsulation and information hiding in OOP

SL + HL≈ 55 minCommand term: ExplainPremium

In this lesson

  • Explaining encapsulation and information hiding
  • Applying the access modifiers private and public (and recognising protected)
  • Controlling access to attributes with accessor and mutator methods that validate changes
  • Explaining why limiting access protects the integrity and security of an object’s state

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What's inside

  1. LearnA capsule for data
  2. LearnAccess modifiers
  3. LabPublic or private?
  4. CodeA mutator that validates
  5. CodeTrying to read a private attribute
  6. LearnWhy limit access?
  7. CheckGood encapsulation?
  8. CheckQuick check
  9. ExamWorked exam answer
  10. ReviewMistakes examiners see
  11. Exam practiceExam-style questions

Ends with 4 exam-style questions worth 11 marks, with a self-marking markscheme.