src/
├── scaler/                  # Scaler Academy coursework
│   ├── advanced/            # Advanced DSA (arrays, binary search, sorting, hashing, strings)
│   │   ├── dsa4/            # DP, graphs, trees, greedy, stacks, queues, heaps
│   │   ├── language/        # Java threading & concurrency
│   │   └── OS/              # Operating system concepts
│   ├── core/                # Fundamentals (sorting, basic DSA)
│   ├── intermediate/        # Intermediate-level DSA
│   ├── lld/                 # Low-Level Design projects
│   │   ├── parkingLot/      # Parking lot management system
│   │   ├── snakesnLadders/  # Snakes and ladders game
│   │   ├── meetingScheduler/ # Meeting scheduler
│   │   ├── pen/             # Pen hierarchy (strategy pattern)
│   │   └── crashCourse/     # Design patterns, generics, LRU cache, SOLID
│   └── ooad/                # OO Analysis & Design (singleton, prototype, builder)
│
├── Interview/               # Interview preparation
│   ├── algorithm/           # Searching algorithms
│   ├── linear_data_structure/ # Arrays, linked lists
│   ├── nonLinearDS/         # Trees, stacks, queues, heaps
│   ├── leetcode/            # LeetCode solutions
│   ├── collectionDemo/      # Java Collections with custom implementations
│   ├── hackerranktest/      # Company-specific coding tests
│   └── sorting/             # Sorting algorithms
│
└── corejava/                # Core Java concepts
    ├── designpatterns/      # Gang of Four patterns (creational, structural)
    ├── concurrency/         # Threading, synchronization, thread pools
    ├── Interview/           # Java interview topics (beginner, medium, java8)
    ├── oops/                # OOP principles, immutability, domain modeling
    ├── java8/               # Streams, lambdas, functional interfaces
    ├── serialised/          # Serialization/deserialization
    ├── exception/           # Exception handling
    └── gc/                  # Garbage collection