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Status: OperationalVersion: 4.2.0
System Design
OverviewTheory lessonsHLDLLD
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Distributed Systems
All System Design modules

Module 6 · Component Architecture

Low-Level Design (LLD) Machine Coding & Problem Solving

Production-grade implementations of classic machine coding interview problems: Parking Lot, Elevator Control, In-Memory LRU/LFU Cache, Rate Limiter Library, Chess, Notification Service, and Splitwise.

Coming soon
Coming soon

Lesson plan

What you will learn

Lessons are being authored

This module is visible so you can understand the full roadmap. Its lesson pages will open after their beginner-friendly explanations and review material are ready.

Coming next in this module
  • Parking Lot System Architecture & Machine Coding
  • Elevator Bank Control System
  • Thread-Safe In-Memory LRU & LFU Cache
  • Rate Limiter Object Modeling & In-Process Library
  • Chess & Turn-Based Board Game Engine
  • Multi-Channel Enterprise Notification Service
  • Splitwise Expense Sharing & Debt Simplification
  • Snake and Ladder Multiplayer Game Engine
  • Movie Ticket Booking & Seat Reservation System (BookMyShow)
  • Hotel Room Reservation & Inventory Locking Engine
  • ATM Machine State Controller & Cash Dispensation

Module outcome

Implement modular, extensible, and thread-safe systems in 90-minute machine coding rounds with clean interfaces, design patterns, and unit tests.

Prerequisite

Module 5 (LLD Theory: OOP, SOLID & Design Patterns).

Mental model

In machine coding rounds, clean contracts, SOLID adherence, concurrency safety, and testability triumph over raw algorithmic speed.

Course baseline

System Design 2026.1

Reviewed 2026-09-14

Previous module Low-Level Design (LLD) Theory: OOP, SOLID & Design PatternsNext moduleThe Interview Playbooks & Execution Frameworks