Low-Level Design

Master Low-Level Design (LLD) from object-oriented programming to design patterns — 71 topics across 13 chapters covering class structures, SOLID principles, GoF patterns, and real case studies.

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71

Topics

13

Chapters

30h

Est. Time

Progress0/71 (0%)

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1

Welcome

3 topics

0% done

1Course Introduction 2Course Roadmap 3Join the Community

2

LLD Introduction

4 topics

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1What is LLD?2Why LLD Matters 3LLD vs HLD 4Design Thinking

3

OOP Fundamentals

7 topics

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1Classes and Objects 2Enums 3Interfaces 4Encapsulation 5Abstraction 6Inheritance 7Polymorphism

4

Class Relationships

4 topics

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1Association 2Aggregation 3Composition 4Dependency

5

Design Principles

3 topics

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1DRY Principle 2KISS Principle 3YAGNI Principle

6

SOLID Principles

5 topics

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1Single Responsibility Principle 2Open/Closed Principle 3Liskov Substitution Principle 4Interface Segregation Principle 5Dependency Inversion Principle

7

UML Diagrams

4 topics

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1Class Diagram 2Use Case Diagram 3Sequence Diagram 4Activity Diagram

8

Creational Patterns

5 topics

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1Singleton 2Builder 3Factory Method 4Abstract Factory 5Prototype

9

Structural Patterns

7 topics

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1Adapter 2Facade 3Decorator 4Composite 5Proxy 6Bridge 7Flyweight

10

Behavioral Patterns

10 topics

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1Strategy 2Iterator 3Observer 4Command 5State 6Template Method 7Chain of Responsibility 8Visitor 9Mediator 10Memento

11

Concurrency & Multi-threading

11 topics

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1Introduction to Concurrency 2Concurrency vs Parallelism 3Processes vs Threads 4Thread Lifecycle & States 5Race Conditions & Critical Sections 6Mutex & Semaphores 7Condition Variables 8Coarse vs. Fine-grained Locking 9Reentrant Locks & CAS (Compare-And-Swap)10Deadlocks & Livelocks 11Concurrency Patterns

12

LLD Interview Framework

2 topics

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1How to Answer an LLD Problem 2Clean Code & Refactoring

13

LLD Case Studies

6 topics

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1Design Parking Lot 2Design Vending Machine 3Design Rate Limiter 4Design Elevator System 5Design Ticket Booking System (BookMyShow)6Design Chess Game