What is an interface in C?

An interface contains definitions for a group of related functionalities that a non-abstract class or a struct must implement. An interface may define static methods, which must have an implementation. Beginning with C# 8.0, an interface may define a default implementation for members.

What is Interfaces explain in detail?

Like a class, an interface defines methods. Unlike a class, an interface never implements methods; instead, classes that implement the interface implement the methods defined by the interface. When a class implements an interface, the class agrees to implement all the methods defined in the interface.

WHAT IS interface in oops with example?

Interfaces specify what a class must do and not how. It is the blueprint of the class. An Interface is about capabilities like a Player may be an interface and any class implementing Player must be able to (or must implement) move(). So it specifies a set of methods that the class has to implement.

What are the interface types?

There are five main types of user interface:

• command line (cli)
• graphical user interface (GUI)
• menu driven (mdi)
• form based (fbi)
• natural language (nli)

WHAT IS interface and its types?

In computer technology, there are several types of interfaces. user interface – the keyboard, mouse, menus of a computer system. The user interface allows the user to communicate with the operating system. hardware interface – the wires, plugs and sockets that hardware devices use to communicate with each other.

What are the two main types of user interfaces?

These are:

• Graphical User Interfaces (GUI)
• Command Line Interfaces (CLI)
• Form-based interfaces.
• Menu-based interfaces.
• Natural language interfaces.

WHAT IS interface and types?

An interface is thus a type definition; anywhere an object can be exchanged (for example, in a function or method call) the type of the object to be exchanged can be defined in terms of one of its implemented interfaces or base-classes rather than specifying the specific class.

What are the three types of interface?

What is interface simple words?

1a : the place at which independent and often unrelated systems meet and act on or communicate with each other the man-machine interface. b : the means by which interaction or communication is achieved at an interface. 2 : a surface forming a common boundary of two bodies, spaces, or phases an oil-water interface.

When to use interfaces?

Interfaces are better in situations in which you do not have to inherit implementation from a base class. Interfaces are useful when you cannot use class inheritance. For example, structures cannot inherit from classes, but they can implement interfaces.

When to use an interface?

One reason to use interfaces is when a class will implement a number of interfaces. An abstract class cannot do that. One example is a class which handles mouse movement and key presses will implement both the (ficticious) IMouseMove and IKeyPress interfaces.

How do you implement interface?

To declare a class that implements an interface, you include an implements clause in the class declaration. Your class can implement more than one interface, so the implements keyword is followed by a comma-separated list of the interfaces implemented by the class. By convention, the implements clause follows the extends clause, if there is one.

Can We creat an instance of an interface?

Yes you can create an instance of an interface using the anonymous inner class syntax and providing implementation of all the methods of the interface. Interfaces and Anonymous inner classes both can’t have a constructor. But you can create an instance initializer block in the anonymous inner class.