Quick Answer: Can Abstract Class Be Used In Multilevel Inheritance?

Is multi level inheritance allowed in Java?

Multilevel Inheritance : In Multilevel Inheritance, a derived class will be inheriting a base class and as well as the derived class also act as the base class to other class.

Please note that Java does not support multiple inheritance with classes.

In java, we can achieve multiple inheritance only through Interfaces..

What is not a type of inheritance?

Explanation: Multiple inheritance in java is implemented using interfaces. Multiple interfaces can be implemented by a class. … Explanation: All classes in java are inherited from Object class. Interfaces are not inherited from Object Class.

How many classes are in multilevel inheritance?

It will make three levels of classes and two levels of inheritance. In some books, it is called multilevel inheritance. This type of inheritance is illustrated withFigure 10.4. Access specifier “protected” is very much useful in this type of inheritance.

What is the multilevel inheritance?

Multilevel inheritance refers to a mechanism in OO technology where one can inherit from a derived class, thereby making this derived class the base class for the new class.

Can abstract class have constructor?

Yes! Abstract classes can have constructors! Yes, when we define a class to be an Abstract Class it cannot be instantiated but that does not mean an Abstract class cannot have a constructor. Each abstract class must have a concrete subclass which will implement the abstract methods of that abstract class.

What is multiple inheritance example?

Multiple Inheritance is a feature of C++ where a class can inherit from more than one classes. The constructors of inherited classes are called in the same order in which they are inherited. For example, in the following program, B’s constructor is called before A’s constructor.

What are the two types of inheritance?

Different Types of InheritanceSingle inheritance.Multi-level inheritance.Multiple inheritance.Multipath inheritance.Hierarchical Inheritance.Hybrid Inheritance.

What is hybrid inheritance in C++?

Hybrid Inheritance in C++ Hybrid inheritance is done when we have to mix different types of inheritance within a single program, for example, mixing single inheritance with multiple inheritance or multiple inheritance within a single program. In the above diagram, Class B and Class C are derived from the base class A.

Can an abstract class have a constructor C++?

A class with one (or more) virtual pure functions is abstract, and it can’t be used to create a new object, so it doesn’t have a constructor.

Can you inherit an abstract class?

Abstract Class If a class is declared abstract, it cannot be instantiated. To use an abstract class, you have to inherit it from another class, provide implementations to the abstract methods in it. If you inherit an abstract class, you have to provide implementations to all the abstract methods in it.

Which type of inheritance must be used so that resultant is hybrid?

Which type of inheritance must be used so that the resultant is hybrid? Explanation: The use of any specific type is not necessary. Though the final structure should not be the same, it should represent more than one type of inheritance if class diagram is drawn.

What is the difference between inheritance and abstraction?

The main difference between abstraction and inheritance is that abstraction allows hiding the internal details and displaying only the functionality to the users, while inheritance allows using properties and methods of an already existing class.

What is multilevel inheritance with example?

Multilevel inheritance in java with example. When a class extends a class, which extends anther class then this is called multilevel inheritance. For example class C extends class B and class B extends class A then this type of inheritance is known as multilevel inheritance.

Which type of inheritance is hybrid?

Hybrid inheritance is a combination of multiple inheritance and multilevel inheritance. A class is derived from two classes as in multiple inheritance. However, one of the parent classes is not a base class. It is a derived class.

Can an interface have a constructor?

No, you cannot have a constructor within an interface in Java. You can have only public, static, final variables and, public, abstract, methods as of Java7.

What is hybrid inheritance give example?

A hybrid inheritance is a combination of more than one types of inheritance. For example when class A and B extends class C & another class D extends class A then this is a hybrid inheritance, because it is a combination of single and hierarchical inheritance.

Can abstract class have body?

Abstract methods cannot have body. Abstract class can have static fields and static method, like other classes. An abstract class cannot be declared as final. Only abstract class can have abstract methods.

What is difference between multiple and multilevel inheritance?

“Multiple Inheritance” refers to the concept of one class extending (Or inherits) more than one base class. … Multilevel inheritance refers, where one can inherit from a derived class, thereby making this derived class the base class for the new class.