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Also, check out my other repositories for more Java-related resources:
Alongside the free resources in this repository, I’ve created professionally structured, in-depth notes for:
- Java Basics
- OOPS
- Advanced Java
- Data Structures & Algorithms (DSA)
- Database Management Systems (DBMS)
- Organized in a logical study flow — perfect for beginners & interview prep.
- Every concept includes examples and explanations.
- Designed for fast revision before interviews or exams.
Support my work and get access to the notes: ( Incase of any negotiable prices, can contact premguru1045@gmail.com )
👉 Buy Me a Coffee – Get the Notes
The premium notes are organized in a well-structured format for smooth navigation, easy learning, and quick revision.
The DBMS module includes:
- SQL Queries & PL/SQL
- Detailed notes on Transaction Management
- Database Introduction & Normalization concepts
Screenshots of the Transaction folder notes.
Screenshots of the SQL folder notes.
Custom-drawn diagrams for better conceptual understanding.
Includes in-depth coding challenges from:
- Zoho
- Mr. Cooper
- Various On-Campus Placement Rounds
An end-to-end Finance Tracker Application with complete project structure.
All fundamental Java concepts organized for step-by-step learning.
Covers Java 8 to Java 23 features — powerful yet often overlooked improvements.
Includes:
- File Handling
- Exception Handling
- Generics
- Java Commands
- And more
Focused content on multithreading and concurrency.
Detailed coverage of:
- All four pillars of Object-Oriented Programming
- Key interview-oriented concepts
📄 View the detailed Table of Contents
There will be a Maintenance Sheet to make it easy for you to spot any new content or updates right away that are being added during the period of plan
https://docs.google.com/spreadsheets/d/1DNCDwI2Wrm6NbWWHzt-2y8xqkU_c3rI4odfpLnmAPLg/edit?usp=sharing
Support my work and get access to the notes:
👉 Buy Me a Coffee – Get the Notes
- All purchases are non-refundable.
- If any planned notes are missing, they will be uploaded on request.
- Please review the Table of Contents before purchase to ensure it matches your learning needs.
👋 Hey there, it's Gc here!
📚 Welcome to the Java-DSA-OOPS-PrepHub repository! This repository is designed to help you master Data Structures and Algorithms (DSA) and Object-Oriented Programming (OOPS) in Java, with a special focus on interview and placement preparation.
✨ Features:
- 📖 Books: Curated selection of books on Java, DSA, and OOPS.
- 📑 Cheat Sheets: Quick reference guides for important concepts.
- 💼 Interview Preparation: Questions and answers for DSA and OOPS.
- ✍️ Handwritten Notes: Detailed notes for better understanding.
📖 Located in the JAVA & DSA BOOK folder.
📑 Located in the JAVA CHEAT SHEET folder.
- Spring Boot Cheat Sheets
- Java Basics Cheat Sheets
- OOPS Cheat Sheets
- DSA Cheat Sheets
💼 Located in the JAVA INTERVIEW PREP QNS folder. This folder contains seven files:
- Main Interview Questions to Cover
- Java Coding DSA Questions with Solutions - Part 1
- Java Coding DSA Questions with Solutions - Part 2
- Java Interview Questions from Guru99
- Java Interview Questions from InterviewBit
- Additional Notes - Part 1
- Additional Notes - Part 2
✍️ Located in the JAVA BASICS & OOPS HANDWRITTEN NOTES folder. This folder has chapter-wise notes on all topics under Java and OOPS.
📜 Located in the JAVA DSA HANDWRITTEN NOTES CHAPTER WISE folder. This folder contains detailed handwritten notes on various DSA topics.
📝 Additional Notes:
JAVA ALL NOTES - 1.pdf: An overall view of everything about Java.JAVA ALL NOTES - 2.pdf: An overall view of everything about Java.
🔗 Additional Resources:
- Clone the repository:
git clone https://github.com/Guru-1205/Java-DSA-OOPS-PrepHub.git
- Navigate to the directory:
cd Java-DSA-OOPS-PrepHub - Explore the resources:
- Books:
JAVA & DSA BOOK/ - Cheat Sheets:
JAVA CHEAT SHEET/ - Interview Preparation:
JAVA INTERVIEW PREP QNS/ - Handwritten Notes:
JAVA BASICS & OOPS HANDWRITTEN NOTES/JAVA DSA HANDWRITTEN NOTES CHAPTER WISE/JAVA ALL NOTES - 1.pdfJAVA ALL NOTES - 2.pdf
- Books:
💡 Contributing: We welcome contributions to enhance the quality and breadth of the resources. If you have any suggestions, corrections, or additional materials, please open an issue or submit a pull request.
- Fork the repository
- Create a new branch:
git checkout -b feature_branch
- Make your changes
- Commit your changes:
git commit -m 'Add new feature' - Push to the branch:
git push origin feature_branch
- Open a pull request
Feel free to adjust the file names and paths according to your actual file structure and resources.
Happy coding!
Cheers, Gc!