Java-DSA-OOPS-PrepHub

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☕ Premium Structured Notes (Optional Upgrade)

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)

📖 Why choose these notes?

• 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.

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🗂 Overall Structure of the Notes

The premium notes are organized in a well-structured format for smooth navigation, easy learning, and quick revision.

📌 DBMS Section

The DBMS module includes:

• SQL Queries & PL/SQL
• Detailed notes on Transaction Management
• Database Introduction & Normalization concepts

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Screenshots of the Transaction folder notes.

📷 SQL Notes – Preview

Screenshots of the SQL folder notes.

✍️ Handwritten Sketches

Custom-drawn diagrams for better conceptual understanding.

💻 Real-World Coding Applications

Includes in-depth coding challenges from:

• Zoho
• Mr. Cooper
• Various On-Campus Placement Rounds

📊 Project Example – Finance Tracker

An end-to-end Finance Tracker Application with complete project structure.

📂 Java Basics – Folder Structure

All fundamental Java concepts organized for step-by-step learning.

📂 Java Misc Concepts

Covers Java 8 to Java 23 features — powerful yet often overlooked improvements.

📂 Advanced Java – Folder Structure

Includes:

• File Handling
• Exception Handling
• Generics
• Java Commands
• And more

📂 Threading – Folder Structure

Focused content on multithreading and concurrency.

📂 Java OOPS – Folder Structure

Detailed coverage of:

• All four pillars of Object-Oriented Programming
• Key interview-oriented concepts

📋 Full List of Topics

📄 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

Check this Maintenance Sheet

https://docs.google.com/spreadsheets/d/1DNCDwI2Wrm6NbWWHzt-2y8xqkU_c3rI4odfpLnmAPLg/edit?usp=sharing

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Support my work and get access to the notes:
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⚠️ Disclaimer

• 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.

Table of Contents

• Introduction
• Features
• Resources
  • Books
  • Cheat Sheets
  • Interview Preparation
  • Handwritten Notes
• Additional Resources
• How to Use
• Contributing

Introduction

👋 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

✨ 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.

Resources

Books

📖 Located in the JAVA & DSA BOOK folder.

Cheat Sheets

📑 Located in the JAVA CHEAT SHEET folder.

• Spring Boot Cheat Sheets
• Java Basics Cheat Sheets
• OOPS Cheat Sheets
• DSA Cheat Sheets

Interview Preparation

💼 Located in the JAVA INTERVIEW PREP QNS folder. This folder contains seven files:

1. Main Interview Questions to Cover
2. Java Coding DSA Questions with Solutions - Part 1
3. Java Coding DSA Questions with Solutions - Part 2
4. Java Interview Questions from Guru99
5. Java Interview Questions from InterviewBit
6. Additional Notes - Part 1
7. Additional Notes - Part 2

Handwritten Notes

✍️ 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

🔗 Additional Resources:

• DSA Bootcamp Java by Kunal Kushwaha
• Apna College AlphaBatch DSA JAVA by Mandar Tule

How to Use

1. Clone the repository:

   git clone https://github.com/Guru-1205/Java-DSA-OOPS-PrepHub.git
   

2. Navigate to the directory:

   cd Java-DSA-OOPS-PrepHub
   

3. 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.pdf
     • JAVA ALL NOTES - 2.pdf

Contributing

💡 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.

1. Fork the repository
2. Create a new branch:

   git checkout -b feature_branch
   

3. Make your changes
4. Commit your changes:

   git commit -m 'Add new feature'
   

5. Push to the branch:

   git push origin feature_branch
   

6. 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!