Understanding Inheritance Concepts

What is inheritance in object-oriented programming?

• Inheritance is a method for storing data in a database.

• Inheritance is a way to create multiple instances of a class.

• Inheritance allows classes to be combined into a single class.

• Inheritance is a mechanism where a new class derives properties and behaviors from an existing class.

Explain the difference between single and multiple inheritance.

• Single inheritance can involve multiple child classes.

• Single inheritance allows for multiple parent classes.

• Multiple inheritance is only possible in certain programming languages.

• Single inheritance involves one parent class, while multiple inheritance involves multiple parent classes.

What is a base class and a derived class?

• A base class is a standalone class, and a derived class is an unrelated class.

• A base class is an interface, and a derived class is an abstract class.

• A base class is a parent class, and a derived class is a child class that inherits from the base class.

• A base class is a subclass, and a derived class is a superclass.

How does inheritance promote code reusability?

• Inheritance allows classes to be completely independent.

• Inheritance prevents any changes to existing classes.

• Inheritance requires all classes to be abstract.

• Inheritance promotes code reusability by allowing new classes to use and extend existing class functionality.

What is method overriding in the context of inheritance?

• Method overriding is a feature in inheritance where a subclass redefines a method from its superclass.

• Method overriding is when a superclass redefines a method from its subclass.

• Method overriding is a process where a method is deleted from the subclass.

• Method overriding is a technique to create multiple methods with the same name in the same class.

Can a derived class access private members of a base class?

• Yes, a derived class can access private members of a base class.

• Private members can be accessed through public methods of the base class.

• No, a derived class cannot access private members of a base class.

• A derived class can access private members if they are declared as protected.

What is the purpose of the 'super' keyword in inheritance?

• To override methods in the child class.

• To call methods or access properties from a parent class.

• To create a new class from scratch.

• To delete properties from a parent class.

How does polymorphism relate to inheritance?

• Polymorphism is a feature that relies on inheritance to allow objects of different classes to be treated as instances of a common superclass.

• Polymorphism prevents objects of different classes from being treated as instances of a common superclass.

• Polymorphism only applies to classes that do not inherit from any superclass.

• Polymorphism is unrelated to inheritance and stands alone as a concept.

What are the advantages and disadvantages of using inheritance?

• Inheritance eliminates the need for code reuse.

• The advantages of inheritance include code reuse, improved organization, easier maintenance, and support for polymorphism. The disadvantages include tight coupling, increased complexity, potential for unintended behavior, and difficulties in debugging.

• Inheritance guarantees no unintended behavior in code.

• Inheritance simplifies debugging and reduces complexity.

Give an example of a real-world scenario where inheritance can be applied.

• A vehicle management system where 'Car' and 'Truck' inherit from a base class 'Vehicle'.

• A game where 'Player' and 'Enemy' have no shared attributes or behaviors.

• A library system where 'Book' and 'Magazine' are treated as completely unrelated entities.

• A software application where 'User' and 'Admin' are separate classes without a common base.