IT2030 Object Oriented Programming Lecture 02

Questions and Answers

What is object-oriented programming?

Object-oriented programming is a method of implementation in which programs are organized as cooperative collections of objects, each representing an instance of some class, united via inheritance relationships.

Which of the following is NOT a learning outcome of the lecture?

Encapsulation

Error Handling (correct)

Polymorphism

Abstraction

A class is the abstract definition of the ______.

data type

An object is a specific instance of a function in a class.

False Signup and view all the answers

Match the following concepts with their definitions:

Abstraction = The concept of hiding the complex reality while exposing only the necessary parts. Encapsulation = Bundling the data and methods that operate on the data. Inheritance = A mechanism where a new class can inherit the properties and methods from an existing class. Polymorphism = The ability to present the same interface for differing underlying forms (data types). Signup and view all the answers

What is the difference between a class and an object?

A class is a blueprint for creating objects and defines a data type, while an object is an instance of a class. Signup and view all the answers

What is a fundamental characteristic of object-oriented programming?

Cooperative collections of objects Signup and view all the answers

What does encapsulation refer to in the context of object-oriented programming?

Encapsulation refers to bundling the data and the methods that operate on that data within a single unit, typically a class. Signup and view all the answers

In object-oriented programming, ______ allows for solving complex problems easily.

objects Signup and view all the answers

Study Notes

Learning Outcomes

Students will revise Object Oriented Concepts learned in Year 1.
Key topics include Object Oriented Programming (OOP), Classes and Objects, Abstraction, Encapsulation, Inheritance, Polymorphism, and Interfaces.
Differences between C++ and Java in writing simple OOP programs will be explored.

Object Oriented Programming (OOP)

OOP organizes programs as cooperative collections of objects.
Each object is an instance of a class and belongs to a hierarchy of classes via inheritance relationships.
Allows for solving complex problems more easily by utilizing collaboration among objects.

Complex Systems

A complex system is created using smaller, independent subsystems.
These subsystems contain their own data and functions.
Reusable independent units can be applied to various problems.

Classes

A class serves as an abstract definition of a data type.
It encompasses data elements (attributes) and operations (methods) applicable to the data type.
Entities represented can include things, people, or abstract concepts.

Objects

An object is a specific instance of a class, functioning as a blueprint for data organization.
Objects store data and perform actions based on the defined attributes and methods of their class.
Multiple objects can be created with the same structure based on a single class definition.

Example of Class in C++

The class definition for a Student in C++ includes attributes like studentNo, name, and CA_marks.
Attributes in classes can be private, controlling their accessibility and encapsulating the data.

Description

This quiz covers the essential concepts of Java classes and objects from the IT2030 Object Oriented Programming course. Students will review their understanding of object-oriented programming principles learned in the first year. Prepare to test your knowledge on these foundational topics and enhance your programming skills.