IT1712 Object-Oriented Programming Concepts Quiz

Classes and Packages

• Each class in a package is placed in a separate file, and the file name begins with the class name.
• To use classes from a package, an import statement is required, with the syntax being import package_name.class_name_or_asterisk;.
• Classes in a package can be used in any program or class definition, regardless of the folder location.

Object-Oriented Programming Concepts

• Object-Oriented Programming (OOP) is a methodology that defines objects with behaviors and interactions to accomplish a task.
• An object has characteristics (attributes) and actions (behaviors), with values of attributes giving the object a state.

Objects and Classes

• Objects of the same kind belong to the same class, with the same data type.
• A class defines a kind of object, serving as a blueprint for defining objects.
• The data type of an object is the name of its class.

Inheritance

• Inheritance allows objects of a class to take on properties of objects from another class.
• Inheritance is used to avoid repetition of programming instructions for each class.
• The extends keyword is used to apply inheritance between classes.

Interfaces

• An interface is a program component that contains headings for public methods.
• Interfaces describe public methods in a class, and are used by another class through the implements keyword.

Packages

• A package is a collection of related classes and interfaces grouped together in a folder.
• The name of the folder is the name of the package.