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System Design Problems - Comprehensive Study Guide

This workspace contains detailed study materials for common system design interview problems, organized by category with comprehensive coverage for each problem.

Folder Structure

SysDesContent/
├── 01-social-feeds/              # Social Feeds and Content Platforms
│   ├── twitter/                  # Design Twitter (10 files)
│   ├── instagram/                # Design Instagram (10 files)  
│   ├── facebook-newsfeed/        # Design Facebook Newsfeed (10 files)
│   ├── reddit-platform/          # Design Reddit Platform (10 files)
│   └── youtube-netflix/          # Design YouTube/Netflix (10 files)
├── 02-messaging-collaboration/   # Messaging and Real-time Collaboration
│   ├── facebook-messenger/       # Design Facebook Messenger
│   ├── live-comment-system/      # Design Live Comment System
│   ├── video-conferencing/       # Design Video Conferencing
│   ├── team-collaboration/       # Design Team Collaboration Tool
│   └── google-docs/              # Design Google Docs
├── 03-ecommerce-payments/        # E-commerce, Payments, and Logistics
│   ├── ecommerce-service/        # Design E-commerce Service
│   ├── shopify-platform/         # Design Shopify Platform
│   ├── payment-service/          # Design Payment Service
│   ├── digital-wallet/           # Design Digital Wallet
│   └── food-delivery/            # Design Food Delivery Service
├── 04-infrastructure-storage/    # Core Infrastructure and Storage
│   ├── key-value-store/          # Design Key-Value Store
│   ├── web-cache/                # Design Web Cache
│   ├── distributed-file-system/  # Design Distributed File System
│   ├── cdn-network/              # Design CDN Network
│   └── load-balancer/            # Design Load Balancer
├── 05-events-queues/             # Events, Queues, and Rate Limiting
│   ├── rate-limiter/             # Design Rate Limiter
│   ├── messaging-system/         # Design Messaging System
│   ├── distributed-counter/      # Design Distributed Counter
│   ├── task-scheduler/           # Design Task Scheduler
│   └── webhook-service/          # Design Webhook Service
├── 06-data-analytics/            # Data, Analytics, and Logging
│   ├── web-analytics/            # Design Web Analytics
│   ├── monitoring-system/        # Design Monitoring System
│   ├── log-analysis/             # Design Log Analysis System
│   ├── ad-click-aggregation/     # Design Ad Click Aggregation
│   └── top-k-analysis/           # Design Top-K Analysis System
├── 07-coordination-consistency/  # IDs, Consistency, and Coordination
│   ├── unique-id-generator/      # Design Unique ID Generator
│   ├── distributed-locking/      # Design Distributed Locking
│   ├── resource-allocation/      # Design Resource Allocation
│   ├── distributed-tracing/      # Design Distributed Tracing
│   └── batch-auditing/           # Design Batch Auditing Service
└── 08-advanced-systems/          # Boss Fight Level Problems
    ├── uber-backend/             # Design Uber Backend
    ├── ticketmaster/             # Design Ticketmaster
    ├── google-search/            # Design Google Search
    ├── stock-trading/            # Design Stock Trading Platform
    └── container-orchestration/  # Design Container Orchestration

Categories Overview

1. Social Feeds and Content Platforms (✅ 5/5 completed)

• Focus: Social media platforms, content sharing, community-driven applications
• Patterns: Fan-out strategies, real-time updates, content ranking, caching
• Scale: Billions of users, real-time interactions, viral content handling

2. Messaging and Real-time Collaboration (✅ 5/5 completed)

• Focus: Real-time communication, messaging platforms, collaborative tools
• Patterns: WebSocket management, message ordering, conflict resolution
• Scale: Real-time delivery, concurrent editing, global synchronization

3. E-commerce, Payments, and Logistics (✅ 5/5 completed)

• Focus: Transaction processing, inventory management, order fulfillment
• Patterns: ACID compliance, fraud detection, supply chain optimization
• Scale: High-volume transactions, financial accuracy, global operations

4. Core Infrastructure and Storage (✅ 5/5 completed)

• Focus: Fundamental building blocks for distributed systems
• Patterns: Consistency models, partitioning, replication, fault tolerance
• Scale: Horizontal scaling, performance optimization, reliability

5. Events, Queues, and Rate Limiting (✅ 5/5 completed)

• Focus: Event-driven systems, asynchronous processing, traffic management
• Patterns: Pub/sub messaging, backpressure handling, distributed coordination
• Scale: High-throughput processing, reliable delivery, flow control

6. Data, Analytics, and Logging (✅ 5/5 completed)

• Focus: Big data processing, analytics platforms, monitoring systems
• Patterns: Stream processing, time-series data, aggregation algorithms
• Scale: Petabyte-scale data, real-time analytics, efficient querying

7. IDs, Consistency, and Coordination (✅ 5/5 completed)

• Focus: Distributed algorithms, consistency mechanisms, coordination services
• Patterns: Consensus algorithms, distributed locking, leader election
• Scale: Global coordination, fault-tolerant consensus, low-latency operations

8. Boss Fight Level Problems (✅ 5/5 completed)

• Focus: Complex multi-domain systems requiring advanced architectural thinking
• Patterns: Integration of multiple system design patterns and domains
• Scale: Extreme requirements combining performance, reliability, and complexity

File Structure per Problem

Each problem contains 10 comprehensive files:

1. 01-problem-statement.md - Requirements and scope definition
2. 02-scale-constraints.md - Scale analysis and constraints
3. 03-architecture.md - High-level system architecture
4. 04-database-design.md - Data modeling and storage design
5. 05-api-design.md - API specifications and interfaces
6. 06-scaling-considerations.md - Scaling strategies and bottlenecks
7. 07-tradeoffs-alternatives.md - Design decisions and alternatives
8. 08-variations-followups.md - Common variations and follow-up questions
9. 09-security-privacy.md - Security, privacy, and compliance
10. 10-interview-tips.md - Interview strategies and talking points

Study Approach

Beginner Path

1. Start with 01-social-feeds (foundational patterns)
2. Move to 04-infrastructure-storage (building blocks)
3. Progress to 02-messaging-collaboration (real-time systems)

Intermediate Path

1. 03-ecommerce-payments (transaction systems)
2. 05-events-queues (event-driven architecture)
3. 06-data-analytics (big data systems)

Advanced Path

1. 07-coordination-consistency (distributed algorithms)
2. 08-advanced-systems (complex multi-domain problems)

Interview Preparation

• Time per problem: 2-3 hours for thorough understanding
• Practice approach: Read problem → Design solution → Compare with materials
• Focus areas: Architecture decisions, scaling strategies, trade-offs

Total Progress: 400/400 files completed across 40/40 problems ✅ COMPLETE!

Current status: ALL 8 categories completed! 🎉

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Last updated: 2026-01-08