Table of Contents
- 1 What do you mean by multiple inheritance?
- 2 Why multiple inheritance is used in Java?
- 3 What is multiple and multilevel inheritance in Java?
- 4 Which symbol is used to create multiple inheritances?
- 5 Can Java extend multiple classes?
- 6 How multiple inheritance is achieved in Java explain with an example?
- 7 Why is multiple inheritance not allowed in Java?
- 8 How multiple inheritance is achieved in Java?
What do you mean by multiple inheritance?
Multiple inheritance is a feature of some object-oriented computer programming languages in which an object or class can inherit features from more than one parent object or parent class. It is distinct from single inheritance, where an object or class may only inherit from one particular object or class.
Why multiple inheritance is used in Java?
Java does not support multiple inheritance because of two reasons: In java, every class is a child of Object class. When it inherits from more than one super class, sub class gets the ambiguity to acquire the property of Object class.. In java every class has a constructor, if we write it explicitly or not at all.
What is multiple and multilevel inheritance in Java?
The difference between Multiple and Multilevel inheritances is that Multiple Inheritance is when a class inherits from many base classes while Multilevel Inheritance is when a class inherits from a derived class, making that derived class a base class for a new class.
What is meaning of multiple inheritance in Java Mcq?
Explanation: The multiple inheritance is used when a class is being derived using two base classes or more. This way a single class can have features of more than one classes inherited into a single unit. This lets us combine two class members into a single class.
Why multiple inheritance is used in interface?
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. It is because its implementation is provided by the implementation class.
Which symbol is used to create multiple inheritances?
comma is used to create multiple inheritance.
Can Java extend multiple classes?
Java allows extending class to any class, but it has a limit. It means a class can extend only a single class at a time. When a class extends a class, then it is called single inheritance . If a class extends more than one class, it is called multi-inheritance , which is not allowed in Java.
How multiple inheritance is achieved in Java explain with an example?
The only way to implement multiple inheritance is to implement multiple interfaces in a class. In java, one class can implements two or more interfaces. This also does not cause any ambiguity because all methods declared in interfaces are implemented in class.
Why does Java not support multiple inheritance?
java does not support multiple inheritance because it does not meet object oriented specification. Due to ambiguity problem will arise if two or more superclass have the same method name, and the super keyword will not be able to decide which superclass to call.
Why multiple inheritance is not possible in Java?
Multiple Inheritance for classes is not supported in Java, but it does support multiple inheritance for interfaces. Main reason for not allowing multiple inheritance for classes is Deadly diamond of Death pattern( also known as DDD).
Why is multiple inheritance not allowed in Java?
The “diamond problem” is an ambiguity that can arise as a consequence of allowing multiple inheritance. It is a serious problem for languages (like C++) that allow for multiple inheritance of state. In Java, however, multiple inheritance is not allowed for classes, only for interfaces, and these do not contain state.
How multiple inheritance is achieved in Java?
Multiple inheritance is the ability of a single class to inherit from multiple classes. Java does not have this capability. The designers of Java considered multiple inheritance to be too complex, and not in line with the goal of keeping Java simple. Multiple inheritance can cause the diamond problem.