CAN interface have other methods?
The interface body can contain abstract methods, default methods, and static methods. An abstract method within an interface is followed by a semicolon, but no braces (an abstract method does not contain an implementation).
Can we have same method name in interface?
Like a class, Interface can have methods, properties, events, and indexers as its members. The implementation of interface’s members will be given by the class who implements the interface implicitly or explicitly. C# allows the implementation of multiple interfaces with the same method name.
What would be the result if class extends two interfaces and both have method with same name and signature?
If two interfaces contain a method with the same signature but different return types, then it is impossible to implement both the interface simultaneously. It is a compile-time error to declare two methods with override-equivalent signatures in a class.
Can I create an instance of interface?
We can’t create instance(interface can’t be instantiated) of interface but we can make reference of it that refers to the Object of its implementing class. A class can implement more than one interface.
How are interfaces similar to classes in Java?
Like a class, an interface can have methods and variables, but the methods declared in an interface are by default abstract (only method signature, no body). Interfaces specify what a class must do and not how.
Which is the simplest form of the interface feature?
The simplest form of this feature is the ability to declare a concrete method in an interface, which is a method with a body. A class that implements this interface need not implement its concrete method.
Why do we use default interface methods in C #?
Default interface methods enable an API author to add methods to an interface in future versions without breaking source or binary compatibility with existing implementations of that interface. The feature enables C# to interoperate with APIs targeting Android (Java) and iOS (Swift), which support similar features.
How is an interface implemented in a language?
Language is an interface. It includes abstract methods: getType () and getVersion (). Like abstract classes, we cannot create objects of interfaces. To use an interface, other classes must implement it. We use the implements keyword to implement an interface.