Contents
Can an interface inherit multiple interfaces?
Multiple inheritance is not allowed. Interfaces are not classes, however, and an interface can extend more than one parent interface.
Can an object have multiple interfaces?
An object can have multiple types: the type of its own class and the types of all the interfaces that the class implements. As with multiple inheritance of implementation, a class can inherit different implementations of a method defined (as default or static) in the interfaces that it extends.
Can a class implement 2 interfaces?
Yes, a class can implement multiple interfaces. Each interface provides contract for some sort of behavior.
Can a class inherit an interface in C #?
A class can inherit a base class and also implement one or more interfaces. So, a class: can implement multiple interfaces (no limits) inherits from a base class (just the one. If none is declared, the base class is object by default)
Which is an example of multiple inheritance using interfaces?
Example 2: Both GFG1 and GFG2 interfaces are implemented by Geeks1 and Geeks2 class. Now Geeks1 and Geeks2 class define languages () and courses () method.
Can a concrete class have multiple interface inheritance in Java?
A concrete class must implement all the abstract methods specified in the interface. Java does not support the concept of multiple inheritances to avoid the diamond problem encountered in C++ without using a virtual base class. However, Java supports multiple interface inheritance where an interface extends more than one super interfaces.
How is an interface different from a class?
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). In this article, we will understand how the concept of inheritance is used in the interface.