Back-End Programming Exam  >  Back-End Programming Videos  >  Kotlin Tutorial for Beginners: Learn Kotlin in easy language  >  #8.3 Kotlin Object Oriented Programming: INHERITANCE Explanation

#8.3 Kotlin Object Oriented Programming: INHERITANCE Explanation Video Lecture | Kotlin Tutorial for Beginners: Learn Kotlin in easy language - Back-End Programming

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FAQs on #8.3 Kotlin Object Oriented Programming: INHERITANCE Explanation Video Lecture - Kotlin Tutorial for Beginners: Learn Kotlin in easy language - Back-End Programming

1. What is inheritance in object-oriented programming?
Ans. Inheritance is a concept in object-oriented programming where a class can inherit properties and methods from another class. The class that inherits is called the subclass or derived class, and the class from which it inherits is called the superclass or base class. Inheritance allows for code reuse and enables the creation of a hierarchical relationship between classes.
2. How is inheritance implemented in Kotlin?
Ans. In Kotlin, inheritance is implemented using the ":" symbol. When defining a class, we can specify the superclass after the ":" symbol. For example, if we want a class "Car" to inherit from a class "Vehicle", we would define it as "class Car : Vehicle". The subclass can then access the properties and methods of the superclass.
3. Can a class inherit from multiple classes in Kotlin?
Ans. No, unlike some other programming languages like C++, Kotlin does not support multiple inheritance. This means that a class can only inherit from a single superclass. However, Kotlin does support interfaces, which allows a class to implement multiple interfaces.
4. What is the difference between inheritance and composition?
Ans. Inheritance and composition are two different ways to achieve code reuse in object-oriented programming. Inheritance involves creating a hierarchy of classes where a subclass inherits properties and methods from a superclass. Composition, on the other hand, involves creating a class that contains other objects as its members. Inheritance represents an "is-a" relationship, while composition represents a "has-a" relationship.
5. What is the purpose of the "super" keyword in Kotlin?
Ans. In Kotlin, the "super" keyword is used to refer to the superclass of a subclass. It can be used to call the superclass's constructor, access its properties and methods, and override its methods. The "super" keyword is especially useful when there is a need to differentiate between the superclass and subclass with the same name for properties or methods.
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