Differences between Interfaces and classes

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Following are the notable differences between class and an interface.
Class
Interface
A class describes the attributes and behaviors of an object.
An interface contains behaviors that a class implements.
A class may contain abstract methods, concrete methods.
An interface contains only abstract methods.
Members of a class can be public, private, protected or default.
All the members of the interface are public by default.
A class can only be inherited from a single class
but can be inherited from more than one interfaces.
classes are extended.
Interfaces are always implemented


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