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Backend Low-Level Design (LLD) — Study Guide

A curated, structured catalog of backend low-level / object-oriented design questions for study and practice. Use it to plan study sessions, track coverage, and rehearse with a repeatable approach.

  • Backend LLD

    Exception Handling Framework Design

    Comprehensive low-level design for a robust exception handling framework with centralized error management, custom exceptions, and structured logging capabilities.

  • Backend LLD

    Transaction Manager System Design

    Comprehensive low-level design for a robust transaction management system with ACID properties, distributed coordination, and failure recovery mechanisms.

  • Backend LLD

    Unit of Work Pattern Design and Implementation

    Comprehensive low-level design for the Unit of Work pattern including class structure, transaction management, and database interaction strategies.

  • Backend LLD

    Repository Pattern Implementation in Backend Systems

    Comprehensive low-level design for implementing the Repository pattern to decouple data access logic from business logic in scalable backend architectures.

  • Backend LLD

    Dependency Injection Container Design and Implementation

    Comprehensive low-level design for a production-ready dependency injection container with singleton, prototype, and lifecycle management capabilities.

  • Backend LLD

    Location Tracking System Design

    Comprehensive low-level design for a scalable location tracking model with real-time updates, storage optimization, and privacy considerations.

  • Backend LLD

    Pricing Calculator Backend System Design

    Comprehensive low-level design for a scalable pricing calculator backend with dynamic rule engine and real-time calculation capabilities.

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