Unit 3: Object-Oriented Programming & Class Libraries in .NET

Unit 3 Learning Hub

Object-Oriented Programming & Class Libraries in .NET

Official MJPRU BCA Unit 3: Object-Oriented Programming & Class Libraries in .NET for BCA-432E (GUI Programming).

Syllabus Topics:Object-Oriented Programming Principles in .NET: Abstraction, Encapsulation, Inheritance, PolymorphismClass and Object Definition: Class Declaration, Object Instantiation (New Keyword), Class Members (Fields, Properties, Methods, Events)Constructors and Destructors: Sub New Constructor, Parameterized Constructors, Constructor Overloading, Finalize and Dispose PatternProperty Procedures in VB: Private Backing Fields, Property...Get...Set...End Property, Auto-Implemented PropertiesInheritance Mechanisms: Single Inheritance, Inherits Keyword, MustInherit (Abstract Classes), NotInheritable (Sealed Classes)Method Overloading vs Method Overriding: Overloads Keyword (Compile-Time Polymorphism), Overrides and Overridable Keywords (Runtime Polymorphism)MyBase and MyClass Keywords: Invoking Base Class Constructors and Methods, Resolving Member ShadowingInterfaces in .NET: Interface Declaration, Implements Keyword, Multiple Interface Implementation, Standard Interfaces (IComparable, IDisposable)Access Modifiers in .NET: Public, Private, Protected, Friend (Internal), Protected Friend Scope SemanticsNamespaces in .NET: Organizing Types, Namespace...End Namespace, Imports Statement, Preventing Class Naming CollisionsDelegates and Events: Declaring Delegates, Delegate Sub/Function, Event Keyword, RaiseEvent, AddHandler and RemoveHandlerCreating and Consuming Class Libraries: Class Library Project (.dll), Compiling Reusable Assemblies, Adding Project References

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Introduction to Computers & The IPO Cycle

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Topic 1 · The foundation of modern computing

Introduction to Computers & The IPO Cycle

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Ready to master this concept? Give it a quick read & tap the check!

💡 The Big Picture:A computer is an electronic system that takes raw data as Input, processes it under programmed logic, and produces meaningful Information as Output.

🍪 Everyday Analogy:Think of baking cookies: Flour & Sugar (Input) ➔ The Oven (Processing) ➔ Warm Delicious Cookie (Output)! 🍪

Key Exam Takeaways

·Data = Raw, unprocessed facts without context (e.g. 42, 'apple').
·Information = Structured data with meaning (e.g. 'Temperature: 42°C').
·Hardware is what you can touch; Software is the instructions running inside.

Instant Knowledge Check

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Which of the following represents unprocessed raw facts?

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