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Guide contents
Low-Level Design
Foundations and Interview Framework
1.
What Is Low-Level Design?
2.
The Low-Level Design Interview Framework
3.
Modeling Domains in Java: From Nouns to Types
4.
Class Diagrams and Relationships in Java
Design Principles
5.
SOLID Principles in Java
6.
Encapsulation and Invariants in Java
7.
State Machines with Sealed Types
8.
Errors in Domain Design
9.
Object Graphs and References
10.
Testability and Dependency Injection
Concurrent Components
11.
Thread-Safe Components in Java
12.
Event Bus and Observers in Java
13.
Blocking Queue and Producer-Consumer in Java
Data-Structure-Centric Problems
14.
Design an LRU Cache (Low-Level Design)
15.
Design a Key-Value Store with TTL in Java (Low-Level Design)
16.
Low-Level Design of a Rate Limiter in Java
17.
Design a Logger Framework in Java (Low-Level Design)
18.
Design a Task Scheduler (Low-Level Design)
19.
Design a Text Editor with Undo and Redo (Low-Level Design)
20.
Design an In-Memory File System in Java (Low-Level Design)
Domain Modeling Problems
21.
Design a Parking Lot
22.
Design an Elevator System
23.
Design a Vending Machine in Java
24.
Design an ATM in Java
25.
Design a Library Management System
26.
Design Tic-Tac-Toe (NxN) in Java
27.
Design Splitwise (Expense Sharing) in Java
28.
Design a Movie Ticket Booking System in Java
29.
Design a Notification Service in Java
Cheat Sheets and Study Plan
30.
LLD Interview Checklist
31.
LLD Study Plan: A 4-Week Path Through the Course
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Low-Level Design
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Concurrent Components
Concurrent Components
Thread-safe components, in-process event buses, and blocking queues.
3 lessons
11.
Thread-Safe Components in Java
12.
Event Bus and Observers in Java
13.
Blocking Queue and Producer-Consumer in Java
