Concept Encoding - Roadmap Overview

Introduction

• Speaker: Shreyash Jain
• Focus: Roadmap for Low Level Design (LLD) and High Level Design (HLD) playlists.

Low Level Design (LLD) Roadmap

Prerequisites

• OOP Fundamentals: Understand concepts such as inheritance, polymorphism, and abstraction.
• Languages: Any OOP language is suitable (C++, Java, Python).

Key Topics

1. SOLID Principles

   • Fundamental principles to understand LLD.

2. Design Patterns

   • Total of 23 design patterns covered.
   • Teaching Method:
     • Important patterns covered first, followed by related questions.
     • Example questions include:
       • Notify me system
       • Pizza system
       • Vending machine
       • ATM
       • Parking lot
       • Tic-tac-toe game
       • File system
       • Elevator system
       • Car rental system
       • Logging system
       • Chess game
       • Splitwise system

3. Interview Questions

   • Questions from real interviews, analyzed from various companies.
   • Importance of covering the right questions based on current trends in interviews.

Future Topics

• Upcoming: Splitwise Simplify Algorithm (important for DSA interviews).
• Potential video sequencing may change based on requests/priorities.

High Level Design (HLD) Roadmap

Key Differences from LLD

• HLD requires understanding of concepts before solving questions.
• Example: Knowledge of consistent hashing is required for related interview questions.

Key Topics

1. Base Concepts

   • TCP, WebSocket, HTTP, WebRTC, Client-Server, Peer-to-Peer architecture.
   • CAP theorem and its significance.
   • Microservices design patterns (especially Saga pattern).

2. Scaling Techniques

   • Scale from zero to a million users.
   • Consistent hashing, SQL vs. NoSQL, database scaling (horizontal/vertical).

3. Upcoming Topics

   • Autocomplete system.
   • Agility components: Kafka, queues, proxies, CDN, storage types, caching.
   • Other important topics: Bloom filters, protocols, leader election, indexing.

Additional Updates

• New Playlist: Spring Boot playlist in development (expected launch by February).
• Commitment to maintain focus on LLD and HLD content despite Spring Boot playlist.

Conclusion

• Encouragement for feedback and collaboration with viewers to improve content.
• Emphasis on the accessibility of system design knowledge (free resources).
• Wish for a good year ahead for viewers.