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Questions and Answers
What is the primary function of access specifiers in C++?
What is the primary function of access specifiers in C++?
Access specifiers define how class members (attributes and methods) can be accessed from different parts of the code.
Explain the difference between public and private access specifiers.
Explain the difference between public and private access specifiers.
public members are accessible from outside the class, while private members can only be accessed from within the class.
What is the purpose of the protected access specifier, and in what context is it primarily used?
What is the purpose of the protected access specifier, and in what context is it primarily used?
protected members are not accessible from outside the class, but they can be accessed in inherited classes. It is used in the context of inheritance.
In C++, if no access specifier is provided for class members, what is the default access level?
In C++, if no access specifier is provided for class members, what is the default access level?
Why is it generally considered good practice to declare class attributes as private?
Why is it generally considered good practice to declare class attributes as private?
If you attempt to access a private member of a class from outside the class, what will happen?
If you attempt to access a private member of a class from outside the class, what will happen?
Give an example of a scenario where using a public access specifier for a class member would be appropriate.
Give an example of a scenario where using a public access specifier for a class member would be appropriate.
Explain how access specifiers contribute to the concept of encapsulation in object-oriented programming.
Explain how access specifiers contribute to the concept of encapsulation in object-oriented programming.
In the following code, why does the line myObj.y = 50; cause an error?
class MyClass {
public:
int x;
private:
int y;
};
int main() {
MyClass myObj;
myObj.x = 25;
myObj.y = 50; // Error here
return 0;
}
In the following code, why does the line myObj.y = 50; cause an error?
class MyClass {
public:
int x;
private:
int y;
};
int main() {
MyClass myObj;
myObj.x = 25;
myObj.y = 50; // Error here
return 0;
}
Explain how you can access a private member from outside the class, according to the content.
Explain how you can access a private member from outside the class, according to the content.
Flashcards
Access specifiers
Access specifiers
Keywords that define how class members (attributes and methods) can be accessed.
Public Access Specifier
Public Access Specifier
Members are accessible from outside the class.
Private Access Specifier
Private Access Specifier
Members cannot be accessed from outside the class.
Protected Access Specifier
Protected Access Specifier
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Good practice for attributes
Good practice for attributes
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Default Access Specifier
Default Access Specifier
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Study Notes
- An access specifier defines how the members (attributes and methods) of a class can be accessed.
- There are three access specifiers in C++:
public,private, andprotected. publicmembers are accessible from outside the class.privatemembers cannot be accessed from outside the class.protectedmembers cannot be accessed from outside the class, but can be accessed in inherited classes.
Public vs. Private Members
- It is possible to access private members of a class using a public method inside the same class.
- If you try to access a private member from outside the class, an error occurs, where
yis private. - It is considered good practice to declare class attributes as
privateas often as possible, reduces the possibility of messing up code and is a main ingredient of the Encapsulation concept. - By default, all members of a class are
privateif you don't specify an access specifier.
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