Visual Cheat Sheets
High-density visual references for System Design, OOP, and Architecture. Perfect for quick revision before interviews.
Database Transactions
Visual guide to ACID, Isolation Levels, Anomalies, and Concurrency Control.
Event-Driven Architecture
Visual guide to Async patterns, Pub-Sub, Message Queues, and Event Sourcing.
Rate Limiting
Visual guide to Token Bucket, Leaky Bucket, Fixed Window, and Sliding Window algorithms.
Caching Strategies
Visual guide to Cache-Aside, Write-Through, Write-Back, and Eviction policies.
Synchronization Primitives
Visualizing locks, semaphores, and barriers for thread safety.
Class Relationships
Mastering Association, Aggregation, Composition, and Inheritance with UML.
LLD Interview Framework
The definitive step-by-step mental model for cracking machine coding rounds.
Approaching LLD Interview
A step-by-step workflow to tackle any Low-Level Design interview problem.
SOLID Principles
Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, Dependency Inversion.
Design Patterns Map
A comprehensive map of Creational, Structural, and Behavioral design patterns.
Database Schema Design
Best practices for designing scalable and efficient database schemas.
Concurrency & Threading
Threads, Processes, Deadlocks, Race Conditions, and Thread Safety.
Python OOP
Object-Oriented Programming concepts specifically for Python developers.
Java OOP
Object-Oriented Programming concepts specifically for Java developers.
Data Structures
Common data structures, their time complexities, and use cases.
HTTP Status Codes
A quick reference for HTTP status codes and their meanings.
UML Sequence Diagrams
How to read and create UML Sequence Diagrams for system interactions.
UML State Machine
Modeling object states and transitions with State Machine Diagrams.
Error Handling
Strategies for robust error handling, exceptions, and fault tolerance.
Design Principles
KISS, DRY, YAGNI, and other essential software design principles.
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