LEVEL 1 — FOUNDATIONS (Beginner)

Understand the core building blocks of scalable systems.

1️⃣ Fundamentals of System Design

• Client–server architecture
• Monolith vs microservices
• Synchronous vs asynchronous communication
• Horizontal vs vertical scaling
• Latency, throughput, availability basics

2️⃣ Networking Basics

• HTTP/HTTPS
• REST vs GraphQL
• WebSockets
• TCP vs UDP
• CDN basics

3️⃣ Databases (Basics)

• SQL vs NoSQL
• Indexing, queries, transactions
• Replication (master–slave, primary–replica)
• Sharding fundamentals
• CAP theorem introduction