Rajat Gajbhiye

System Designs - A Comprehensive Guide 

Actually, 80% of system design interview questions come from just 20% of topics. My guide helps you focus on what really matters, making your preparation smarter and more effective!

PS: Use the SDE10 Coupon code to get a 10% discount (only for the next few users, so GO CHECK IT OUT FAST!!!)

What’s Inside????? 

PART 1: Understand System Design from Basics to Advanced 

Learn system design step by step with clear explanations, real-world examples, and code snippets. Whether you're just starting or already have experience, this guide will help you build a strong understanding and boost your confidence. 

System Design Topics Covered: 

1. Introduction to System Design 
2. Scalability and Performance 
3. Latency and Throughput 
4. Architectural Patterns 
5. Availability and Availability Patterns 
6. Replication 
7. Consistency and Consistency Patterns 
8. CAP Theorem 
9. PACELC Theorem 
10. Database and Storage 
11. Relational Databases 
12. Database Isolation Levels 
13. Scaling Databases 
14. Sharding and Partitioning 
15. Non-Relational Databases 
16. Choosing the Right Database 
17. Caching 
18. Asynchronous Processing 
19. Message Queues (Kafka, RabbitMQ) 
20. Monolithic vs. Microservices Architecture 
21. Event-Driven Architecture 
22. API Gateway and Backend for Frontend (BFF) 
23. REST, GraphQL, and gRPC 
24. Long Polling, WebSockets, Server-Sent Events (SSE) 
25. Design Patterns 
26. Resiliency 
27. Designing for Resiliency 
28. Load Balancers 
29. Circuit Breakers 
30. System Essentials 
31. Consistent Hashing 
32. Networking and Communication 
33. Real-World Architectures & Engineering Blogs 

PART 2: Ultimate Cheat Sheet 

This quick-reference cheat sheet I made covers the most important system design concepts, making it easy to review key points right before your interview. 

PART 3: 50 Detailed Q&A for LLD and HLD 

50 carefully selected interview questions, covering both Low-Level Design (LLD) and High-Level Design (HLD). Each question comes with: 

✔️ Clear explanations 

✔️ Diagrams for better understanding 

✔️ Real-world examples 

✔️ Practical insights to simplify complex topics 

PS: Use the SDE10 Coupon code to get a 10% discount (only for the next few users, so GO CHECK IT OUT FAST!!!)

If you're struggling with system design interviews, then to be honest you’re not alone and with so many concepts to learn, it’s very easy to feel overwhelmed. 

BUT here’s the good news, you don’t actually need to know everything to ace the interview. In fact, 80% of system design interviews focus on just 20% of the topics (I know, hard to believe). 

My guide (which I am very proud of) zeroes in on those key areas, helping you focus your efforts on what really matters. With a clear roadmap, you'll be better prepared and increase your chances of success!