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Questions and Answers
Which keyword is used to inherit properties from one class to another?
Which keyword is used to inherit properties from one class to another?
- extend (correct)
- inherit
- import
- implement
What is the visibility of a private member?
What is the visibility of a private member?
- visible wherever its class can be referenced
- visible anywhere in the module where its class is declared and from any descendant class
- invisible outside of the unit or program where its class is declared (correct)
- visible to all classes in the same package
Can a subclass inherit private methods from its superclass?
Can a subclass inherit private methods from its superclass?
- Yes
- No (correct)
- It depends on the programming language used
- It depends on how the superclass is defined
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Study Notes
- The keyword used to inherit properties from one class to another is "inheritance."
- The Test2 function calls the Test1 function with parameters u and v.
- The output of the Test2 function depends on the values of u and v.
- A subclass does not inherit private methods from its superclass.
- A private member is invisible outside of the unit or program where its class is declared.
- A public member is visible wherever its class can be referenced.
- A protected member is visible anywhere in the module where its class is declared and from any descendant class.
- Object-oriented languages provide mechanisms to implement the object-oriented model.
- The example of "Department" and "Teacher" in a high school involves a relationship between the two.
- A teacher can belong to multiple departments and teach multiple subjects.
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