Can Interface Inherit Abstract Class?

Can a class inherit multiple interfaces?

A class can implement more than one interface, which can contain default methods that have the same name.

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 you implement an abstract class?

Abstract classes cannot be instantiated, but they can be subclassed. When an abstract class is subclassed, the subclass usually provides implementations for all of the abstract methods in its parent class. However, if it does not, then the subclass must also be declared abstract .

Can we inherit more than one abstract class?

Basically, the rule says that you can inherit from (extend) as many classes as you want, but if you do, only one of those classes can contain concrete (implemented) methods. … A class can extend at most one abstract class, but may implement many interfaces. That is, Java supports a limited form of multiple inheritance.

Which is faster abstract class or interface in C#?

In C#, an interface can only have a signature, not the implementation. An abstract class can provide complete implementation. The interface is comparatively slow. An abstract class is fast.

Can a class implement inheritance?

Related Articles. A class can extends another class and/ can implement one and more than one interface. // and provides implementation to the method. … Interface inheritance : An Interface can extend other interface.

Can an interface inherit a class?

Interfaces can inherit from one or more interfaces. The derived interface inherits the members from its base interfaces. A class that implements a derived interface must implement all members in the derived interface, including all members of the derived interface’s base interfaces.

What are the conditions for inheriting an abstract class?

1) Abstract method has no body. 2) Always end the declaration with a semicolon(;). 3) It must be overridden. An abstract class must be extended and in a same way abstract method must be overridden.

Can an interface extend an abstract class?

Implementation: Abstract class can provide the implementation of interface. Interface can’t provide the implementation of abstract class. … Multiple implementation: An interface can extend another Java interface only, an abstract class can extend another Java class and implement multiple Java interfaces.

Which is better abstract class or interface?

The short answer: An abstract class allows you to create functionality that subclasses can implement or override. An interface only allows you to define functionality, not implement it. And whereas a class can extend only one abstract class, it can take advantage of multiple interfaces.

Can an abstract class be a superclass?

We can treat an abstract class as a superclass and extend it; its subclasses can override some or all of its inherited abstract methods. If through this overriding a subclass contains no more abstract methods, that class is concrete (and we can construct objects directly from it).

Can interface inherit another interface?

An interface can extend any number of interfaces but one interface cannot implement another interface, because if any interface is implemented then its methods must be defined and interface never has the definition of any method.

Can we inherit abstract class from interface in C#?

In C#, two classes (either abstract or concrete) cannot be inherited by the same derived class. It causes ambiguity in the derived class if both have the same method signature. We can do multiple inheritance in C# using interfaces. … A single class can implement any number of Service Contract Interfaces.