held on weekends (Saturday-Sunday) to accommodate students and working professionals. : Programs typically span 10 to 12 weeks

Implementing authentication and authorization using JWT (JSON Web Tokens) or OAuth2. Data Persistence: JDBC, Hibernate, and Spring Data JPA

: Multithreading, HashMaps, and Sequential vs. Parallel execution. Project Tools : Managing builds with Maven and Gradle . Phase 2: Frameworks & APIs (Weeks 3–6)

You cannot work alone. Master:

Abstract classes and interfaces (including Java 8+ default and static methods). Advanced Core Java

From basic Java syntax to advanced topics like microservices, Kafka, and Docker, the curriculum covers everything needed to become a job-ready backend engineer.

Lambda expressions, Streams API, and Optional class for writing functional, concise code. 2. Database Connectivity and SQL

Modern Java backends extensively use Functional Interfaces, Lambda Expressions, and the Stream API to write concise, readable, and parallelizable code. 2. Java Database Connectivity (JDBC) and ORM Frameworks

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GeeksforGeeks provides a structured approach to learning Java backend development through their live courses and extensive documentation.

Build 2-3 real-world projects (e.g., an E-commerce backend or a Banking API).

The foundational building blocks of Java web applications.

GeeksForGeeks has an entire dedicated "Spring Boot" module that rivals paid bootcamps. Here is what you need to read cover-to-cover:

Tip: Use the to filter problems specifically by language (Java) and topic to build muscle memory. 4. Phase 3: Database Management Systems (DBMS)

Backend development relies heavily on OOPs principles. You must deeply understand Inheritance, Polymorphism, Encapsulation, and Abstraction . GFG offers dedicated quizzes and articles to test these concepts.