Additional resources

Hard Problems

• Coursera - Object-Oriented Design
• Coursera - Design Patterns
• Github - Awesome Design Patterns

📚 Books

Hard Problems

• Head First Design Patterns
• Clean Code
• Refactoring: Improving the Design of Existing Code

🔗 Class Relationships

• Association
• Aggregation
• Composition
• Dependency

⏱️ Concurrency and Multi-threading Concepts

Concurrency 101

• Introduction to Concurrency
• Concurrency vs Parallelism
• Processes vs Threads
• Thread Lifecycle and States
• Race Conditions and Critical Sections

Concurrency Challenges

• Deadlock
• Livelock

Concurrency Patterns

• Signaling Pattern
• Thread Pool Pattern
• Producer-Consumer Pattern
• Reader-Writer Pattern

Synchronization Primitives

• Mutex (Mutual Exclusion)
• Semaphores
• Condition Variables
• Coarse-grained vs Fine-grained Locking
• Reentrant Locks
• Try-Lock and Timed Locking
• Compare-and-Swap (CAS)

⏱️ Concurrency and Multi-threading Problems

Hard Problems

• Print FooBar Alternately
• Print Zero Even Odd
• Fizz Buzz Multithreaded
• Building H2O Molecule
• Design Thread-Safe Cache with TTL
• Design Concurrent HashMap
• Design Thread-Safe Blocking Queue
• Design Concurrent Bloom Filter
• Multi-threaded Merge Sort

📇 Courses

Hard Problems

• Master LLD Interviews - AlgoMaster.io
• Master Concurrency Interviews - AlgoMaster.io

🧩 Design Patterns

• Singleton
• Factory Method
• Abstract Factory
• Builder
• Prototype
• Flyweight - method) |
• Proxy
• Mediator
• Memento
• Chain of Responsibility

🧭 Design Principles

• SOLID Principles with Pictures
• SOLID Principles with Code
• DRY Principle
• YAGNI Principle
• KISS Principle

📩 Newsletter

Hard Problems

• AlgoMaster Newsletter

🧱 OOP Fundamentals

• Classes and Objects
• Enums
• Interfaces
• Encapsulation
• Abstraction
• Inheritance
• Polymorphism

🏁 Start Here

• How to Learn LLD
• 15 Must-Know OOP Concepts

🗂️ UML

• Class Diagram
• Use Case Diagram
• Sequence Diagram
• Activity Diagram
• State Machine Diagram