Software Engineering10 lessons30 quiz questions

OOP & Design Patterns

20-hour Pareto plan covering the design patterns and OOP principles that appear in 90% of system design interviews and code reviews. Focuses on the 10 most important patterns with real-world implementations.

What You Will Learn

  • ✓OOP Mental Model: Objects, Abstraction, and Design Principles
  • ✓Creational Patterns: Factory, Builder, and Singleton
  • ✓Structural Patterns: Adapter, Decorator, and Facade
  • ✓Behavioral Patterns: Observer and Strategy
  • ✓Behavioral Patterns: Command, Template Method, and Iterator
  • ✓Composition over Inheritance
  • ✓Dependency Injection and Inversion of Control
  • ✓Identifying Patterns in Real Code and Antipatterns
  • ✓Design Patterns in System Design Interviews
  • ✓Capstone: Design a Pluggable System Using Multiple Patterns

Overview

20-hour Pareto plan covering the design patterns and OOP principles that appear in 90% of system design interviews and code reviews. Focuses on the 10 most important patterns with real-world implementations. OOP & Design Patterns Object-Oriented Programming principles are tested in every system design and coding interview. The Four Pillars Encapsulation: Hide internal state, expose methods Inheritance: Reuse code through parent classes Polymorphism: Same interface, different behavior Abstraction: Hide complexity behind simple interfaces Composition Over Inheritance Interview Tip "Always mention composition over inheritance — it shows you understand the limitations of deep inheritance hierarchies and prefer flexible designs." Java Implementation — SOLID Patterns

Sample Quiz Questions

1. What does the 'O' in SOLID stand for and how do you achieve it?

Understand·Difficulty: 2/5

2. What is the Liskov Substitution Principle and give an example of a violation?

Apply·Difficulty: 3/5

3. What is the difference between the Factory Method and Abstract Factory patterns?

Apply·Difficulty: 3/5

+ 27 more questions available in the full app.

Related Topics

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Software Design Patterns

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Data Structures

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