All Flashcards
What is the definition of 'this' keyword?
A keyword that refers to the object calling the method or the object the constructor is trying to make.
What does 'this.variableName' refer to?
The instance variable of the current object.
What is an overloaded constructor?
A constructor with the same name as the class but with different parameters.
What is an instance variable?
A variable defined in a class (i.e. a member variable) for which every object of the class has its own copy.
What is a local variable?
A variable that is given local scope. It is accessible only from the function or block in which it is defined.
What does the @Override annotation do?
Indicates that a method declaration is intended to override a method declaration in a superclass.
What is the purpose of a constructor?
To initialize the state of an object.
What is the purpose of a mutator method?
To modify the state of an object.
What is the purpose of an accessor method?
To access the state of an object.
What is the purpose of a static variable?
A variable that is shared by all objects of the class.
How is the 'this' keyword used in event handling in GUI programming?
The 'this' keyword can be used to pass the current object as an event listener to a GUI component.
How are overloaded constructors useful in database interactions?
They allow creating objects with varying amounts of data retrieved from a database.
How is the concept of instance variables applied in a game development?
To store information about a player, such as health, score, and position.
How are accessor methods applied in a social media application?
To retrieve user profile information, such as name, email, and profile picture.
How are mutator methods applied in an e-commerce application?
To update product information, such as price, quantity, and description.
How is the concept of static variables applied in a banking application?
To store the interest rate for all accounts.
How is the concept of encapsulation applied in a library management system?
To protect the internal state of a book object, such as title, author, and ISBN.
How is the concept of inheritance applied in a vehicle management system?
To create specialized vehicle types, such as cars, trucks, and motorcycles, from a common vehicle class.
How is the concept of polymorphism applied in a graphics editor?
To allow different shapes, such as circles, squares, and triangles, to be drawn using a common draw method.
How is the concept of abstraction applied in a operating system?
To hide the complex implementation details of the hardware and expose only the essential features to the user.
Why use 'this' to differentiate instance and local variables?
To resolve naming conflicts when a local variable has the same name as an instance variable.
How does 'this()' help with constructor overloading?
It allows one constructor to call another constructor within the same class, avoiding code duplication.
What is the benefit of using overloaded constructors?
Provides flexibility in object creation by allowing different ways to initialize an object with varying parameters.
What is the purpose of encapsulation?
To hide the internal state of an object and protect it from outside access.
What is the purpose of inheritance?
To allow a class to inherit the properties and methods of another class.
What is the purpose of polymorphism?
To allow objects of different classes to be treated as objects of a common type.
What is the difference between a class and an object?
A class is a blueprint for creating objects, while an object is an instance of a class.
What is the difference between a method and a function?
A method is a function that is associated with an object, while a function is a standalone block of code.
What is the purpose of abstraction?
To hide the complex implementation details of a system and expose only the essential features.
What is the purpose of modularity?
To divide a system into smaller, independent modules that can be developed and tested separately.