What is are the differences between public/private and protected instance variables?

Public variables, are variables that are visible to all classes. Private variables, are variables that are visible only to the class to which they belong. Protected variables, are variables that are visible only to the class to which they belong, and any subclasses.

What is the difference between public/private protected and static?

public – can be access by anyone anywhere. private – can only be accessed from with in the class it is a part of. protected – can only be accessed from with in the class or any object that inherits off of the class.

What is difference between private and protected in PHP?

protected – the property or method can be accessed within the class and by classes derived from that class. private – the property or method can ONLY be accessed within the class.

What is the difference between public static and public?

Static means that it can be accessed without instantiating a class. Static methods need to have no effect on the state of the object. They can have local variables in addition to the parameters. Public: Public declared items can be accessed everywhere.

What is the difference between public protected and private in a class definition?

Broadly speaking, public means everyone is allowed to access, private means that only members of the same class are allowed to access, and protected means that members of subclasses are also allowed. However, each language adds its own things to this.

What is a difference between private and protected access of a method or variable?

The private modifier specifies that the member can only be accessed in its own class. The protected modifier specifies that the member can only be accessed within its own package (as with package-private) and, in addition, by a subclass of its class in another package.

What is the difference between private public protected?

First and important difference is the accessibility i.e. anything public is accessible to anywhere , anything private is only accessible in the class they are declared , anything protected is accessible outside the package but only to child classes and default is accessible only inside the package.

What is the difference between public and private class member?

All the class members declared under public will be available to everyone. The class members declared as private can be accessed only by the functions inside the class. The data members and member functions declared public can be accessed by other classes too.

What is the difference between public/private and protected?

If the class member declared as public then it can be accessed everywhere. If the class members declared as protected then it can be accessed only within the class itself and by inheriting child classes. If the class members declared as private then it may only be accessed by the class that defines the member.

What is the difference between static and non static variables?

Static variables are shared among all instances of a class. Non static variables are specific to that instance of a class. Static variable is like a global variable and is available to all methods. Non static variable is like a local variable and they can be accessed through only instance of a class.

What is the difference between public and public void?

public is an access specifier. void is a return type, or more specifically the lack of a return type.

What are the differences between private and protected members ie data and method of a class?

Difference between Private and Protected

Private	Protected
Only the member functions or the friend functions are allowed to access the private data members of a class.	The class member declared as Protected are inaccessible outside the class but they can be accessed by any subclass(derived class) of that class.