All Flashcards
How is inheritance applied in GUI frameworks?
GUI components (e.g., buttons, text fields) are often created as subclasses of a base component class, inheriting common properties and behaviors.
How is inheritance used in creating different types of bank accounts?
A base 'Account' class can be a superclass for 'SavingsAccount' and 'CheckingAccount', inheriting common account properties and methods.
How can inheritance be applied in a game development context?
A base 'GameObject' class can be a superclass for different game entities like 'Player', 'Enemy', and 'Item', sharing common properties like position and collision detection.
How is inheritance applied in creating different types of employees in a company?
A base 'Employee' class can be a superclass for 'Manager', 'Developer', and 'SalesPerson', inheriting common employee attributes and methods.
How is inheritance used in representing different types of vehicles?
A base 'Vehicle' class can be a superclass for 'Car', 'Truck', and 'Motorcycle', inheriting common vehicle properties and methods.
How is inheritance applied in creating different shapes in a drawing application?
A base 'Shape' class can be a superclass for 'Circle', 'Rectangle', and 'Triangle', inheriting common properties like color and position.
How is inheritance used in representing different types of media files?
A base 'MediaFile' class can be a superclass for 'AudioFile', 'VideoFile', and 'ImageFile', inheriting common properties like file size and format.
How is inheritance applied in creating different types of users in a social media platform?
A base 'User' class can be a superclass for 'Admin', 'Moderator', and 'RegularUser', inheriting common user attributes and methods.
How is inheritance used in representing different types of geometric figures?
A base 'Figure' class can be a superclass for 'Square', 'Circle', and 'Triangle', inheriting common properties like area and perimeter calculations.
How is inheritance applied in creating different types of network connections?
A base 'Connection' class can be a superclass for 'WifiConnection', 'BluetoothConnection', and 'EthernetConnection', inheriting common connection properties and methods.
What is the primary benefit of using inheritance?
Code reusability. Subclasses inherit methods and instance variables from superclasses, reducing code duplication.
Why is inheritance considered a pillar of object-oriented programming?
Because it promotes abstraction and code organization by establishing hierarchical relationships between classes.
How does inheritance relate to the 'is-a' relationship?
A subclass 'is-a' more specific type of its superclass (e.g., 'APSubject is-a SchoolSubject').
What is the restriction on the number of superclasses a Java class can inherit from?
A Java class can only inherit from one superclass (single inheritance).
What is the role of polymorphism in OOP?
It allows objects of different classes to be treated as objects of a common type (usually a superclass), enabling flexibility and code extensibility.
How does method overriding contribute to polymorphism?
It allows subclasses to provide their own specific implementations of methods defined in the superclass, enabling different behaviors for the same method call.
Explain the concept of code reusability in inheritance.
Subclasses inherit the properties and methods of their superclasses, avoiding the need to rewrite the same code in multiple classes.
What is the significance of the Object class in Java's inheritance hierarchy?
It is the root of the class hierarchy. Every class in Java directly or indirectly inherits from the Object class.
What is the purpose of creating subclasses?
To create more specialized classes that inherit and extend the functionality of a more general superclass.
What is the difference between inheritance and composition?
Inheritance is an 'is-a' relationship, while composition is a 'has-a' relationship. Inheritance creates a tight coupling between classes, while composition promotes loose coupling.
What is the definition of Inheritance?
A mechanism where one class (subclass) acquires the properties (methods and instance variables) of another class (superclass).
What is the definition of a Superclass?
The class whose properties are inherited by another class.
What is the definition of a Subclass?
The class that inherits properties from another class (the superclass).
What is the definition of Polymorphism?
The ability of an object to take on many forms. Allows an object to be treated as an instance of its own class or its parent class.
What is the definition of Object-Oriented Programming (OOP)?
A programming paradigm based on the concept of 'objects', which contain data and code to manipulate that data.
What is the definition of Method Overriding?
When a subclass provides a specific implementation for a method that is already defined in its superclass.
What is the definition of the 'extends' keyword in Java?
A keyword used in Java to indicate that a class inherits from another class.
What is the definition of the 'super' keyword in Java?
A keyword used to access members of the superclass from within a subclass.
What is the Diamond Problem?
A problem that arises in multiple inheritance where a class inherits from two classes that have a common ancestor, leading to ambiguity in method resolution.
What is Dynamic Typing?
Type checking is done during run-time.
What is Static Typing?
Type checking is done during compile-time.