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Questions and Answers
In OOP, encapsulation allows the external modification of an object's internal state directly.
In OOP, encapsulation allows the external modification of an object's internal state directly.
False (B)
Data hiding is a benefit of abstraction in OOP.
Data hiding is a benefit of abstraction in OOP.
False (B)
Encapsulation promotes code duplication by scattering code across multiple classes.
Encapsulation promotes code duplication by scattering code across multiple classes.
False (B)
In Python, protected members are strictly enforced by the language itself.
In Python, protected members are strictly enforced by the language itself.
Access modifiers in OOP languages control access to methods only.
Access modifiers in OOP languages control access to methods only.
Encapsulation enhances security by providing direct access to sensitive data.
Encapsulation enhances security by providing direct access to sensitive data.
In Java, protected members are accessible from anywhere in the code.
In Java, protected members are accessible from anywhere in the code.
Encapsulation allows the internal representation of an object to be public to the outside world.
Encapsulation allows the internal representation of an object to be public to the outside world.
In OOP, encapsulation hides the external representation of an object from the outside world.
In OOP, encapsulation hides the external representation of an object from the outside world.
Abstraction is a benefit of encapsulation in OOP.
Abstraction is a benefit of encapsulation in OOP.
Encapsulation actually promotes modularity by organizing code into self-contained units (classes).
Encapsulation actually promotes modularity by organizing code into self-contained units (classes).
In Python, access modifiers strictly control access to protected members.
In Python, access modifiers strictly control access to protected members.
Access modifiers in OOP languages control access to data only.
Access modifiers in OOP languages control access to data only.
Encapsulation provides direct access to sensitive data, reducing security.
Encapsulation provides direct access to sensitive data, reducing security.
In Java, protected members are accessible from any part of the code.
In Java, protected members are accessible from any part of the code.
Encapsulation allows external code to directly modify an object's internal state.
Encapsulation allows external code to directly modify an object's internal state.
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Study Notes
Encapsulation
- Encapsulation allows the internal representation of an object to be hidden from the outside world, exposing only necessary parts through methods.
- It prevents the internal state of an object from being modified directly by external code, ensuring data integrity.
- Benefits of encapsulation include:
- Data Hiding: prevents accidental modification of data and ensures data integrity.
- Abstraction: provides a clear separation between internal implementation details and external interface.
- Modularity: promotes modularity by organizing code into self-contained units (classes), making it easier to manage and maintain.
- Security: enhances security by restricting direct access to sensitive data.
Access Modifiers
- In OOP languages, there are three access modifiers that control access to attributes and methods: Public, Private, and Protected.
- Public access allows access from anywhere.
- Private access restricts access to within the same class.
- Protected access is a convention in languages like Python, but is enforced in languages like Java.
- In Python, protected members are accessible within the same class or its subclasses, but it's up to developers to follow the convention.
Inheritance
- Inheritance is a key feature of Object-oriented programming methodology.
- It allows creating a new class by deriving it from a pre-existing class, listing the parent class in parentheses after the new class name.
- Inheritance enables the reuse and extension of existing class capabilities to design new classes.
Encapsulation
- Allows the internal representation of an object to be hidden from the outside world, exposing only necessary parts through methods.
- Enables data hiding, preventing direct modification of data and ensuring data integrity.
- Provides abstraction, separating internal implementation details from the external interface.
- Promotes modularity by organizing code into self-contained units (classes).
- Enhances security by restricting direct access to sensitive data.
Access Modifiers
- Three access modifiers control access to attributes and methods: Public, Private, and Protected.
- In Python, "protected" members are a convention, not strictly enforced by the language.
- Other languages, such as Java, enforce protected access control within the same package or by subclasses.
Inheritance
- Derives a new class from a pre-existing class by listing the parent class in parentheses.
- Allows capabilities of an existing class to be reused and extended to design a new class.
- Enables creation of a new class without starting from scratch.
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