How many classes can implement a single interface?

A class can extend only one class, but implement many interfaces. An interface can extend another interface, in a similar way as a class can extend another class.

Can an interface have multiple implementations?

In interfaces, a class can implement more than one interface which can’t be done through extends keyword. Please refer Multiple inheritance in java for more.

Can an interface be implemented by multiple classes in C#?

In Multiple inheritance, one class can have more than one superclass and inherit features from all its parent classes. But C# does not support multiple class inheritance. To overcome this problem we use interfaces to achieve multiple class inheritance.

Can a program have multiple classes?

You can create multiple classes in Java and create a class hierarchy such that one class can call another class. In general, Java has a main public class with a name that should match with the Java class file name and it calls other classes from this main class.

Can one interface extends multiple interface?

Yes, we can do it. An interface can extend multiple interfaces in Java.

Can an interface implement 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 two classes implement interface?

Yes, a class can implement multiple interfaces.

Can two interface have same method?

Interfaces can now contain methods with implementations. So, if the class already has the same method as an Interface, then the default method from the implemented Interface does not take effect. However, if two interfaces implement the same default method, then there is a conflict.

How do you separate multiple classes?

To specify multiple classes, separate the class names with a space, e.g. . This allows you to combine several CSS classes for one HTML element.

How many classes can be defined in a single program Mcq?

Discussion Forum

Can interface implement another interface?

Does interfaces allow multiple implementation inheritance?

Q) Multiple inheritance is not supported through class in java, but it is possible by an interface, why? As we have explained in the inheritance chapter, multiple inheritance is not supported in the case of class because of ambiguity. However, it is supported in case of an interface because there is no ambiguity.

Can anonymous class implement interface?

Although an anonymous class can be complex, the syntax of anonymous class declarations makes them most suitable for small classes that have just a few simple methods. An anonymous class must always implement an interface or extend an abstract class. However, you don’t use the extends or implements keyword to create an anonymous class.

Can one class extend multiple classes?

A class can only extend one other class, but it can implement more than one interface. This example shows how the YellowMarker class extends the Marker class. To run the inheritance examples in this section, first create the Marker class.

Can interface inherit from a class?

A class can inherit from only another class but it can implement as many interfaces as possible. When a class inherits from another class and implement some interface, the base class should be listed first, then the interfaces go after like this:

Can interface extend multiple interfaces?

An interface can extend multiple interfaces. A class can implement multiple interfaces. However, a class can only extend a single class. Careful how you use the words extends and implements when talking about interface and class.