Question at position 17 What is the main purpose of encapsulation?To easily increase the number of available methods in the classTo create multiple child classesTo bundle data and methods together and protect internal dataTo override methods and create new behaviorClear my selection

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BlackTom AI · Accepted Answer

The question asks about the main purpose of encapsulation in object-oriented programming. 
Option 1: 'To easily increase the number of available methods in the class' — Encapsulation does not primarily aim to increase methods; it focuses on data protection and hiding implementation details, though it may accompany adding methods. This makes it incorrect as the main purpose. 
Option 2: 'To create multiple child classes' — Creating multiple child classes is related to inheritance, not encapsulation. Encapsulation concerns how a class hides its internals, not how it structures inheritance. Therefore this is not the correct purpose. 
Option 3: 'To bundle data and methods together and protect internal data' — This captures the core idea: encapsulation groups data (attributes) and methods (functions) together within a class, and it restricts direct access to some of the object's components, typically by using access modifiers, thereby protecting internal data. This aligns with the canonical explanation of encapsulation. 
Option 4: 'To override methods and create new behavior' — Overriding methods is a feature of polymorphism and inheritance, not encapsulation. It concerns changing existing behavior in a subclass, which is separate from encapsulation’s goal. Thus this is incorrect. 
Overall, the only option that accurately describes the main purpose of encapsulation is option 3, as it emphasizes bundling together and protecting internal data while grouping related behavior with the data it operates on.

Question at position 17 What is the main purpose of encapsulation?To easily increase the number of available methods in the classTo create multiple child classesTo bundle data and methods together and protect internal dataTo override methods and create new behaviorClear my selection单项选择题

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Question at position 24 What does encapsulation mainly protect against, according to the slides?Overriding methodsSlowing down the programMaking too many classesAccidental access to internal dataClear my selection

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