✅ Java Backend Development – Complete Revision List 🔷 1. Core Java 🔹 Basics OOP Principles: Inheri

🔹 Basics

Understand Java syntax and structure

Familiarize with data types and variables

Learn about operators and expressions

🔹 Object-Oriented Programming (OOP) Principles

Inheritance: Understand superclasses and subclasses

Encapsulation: Learn about access modifiers and getters/setters

Polymorphism: Understand method overloading and overriding

Abstraction: Familiarity with abstract classes and interfaces

*🔹 Exception Handling

Learn try-catch blocks

Understand checked and unchecked exceptions

Familiarize with custom exceptions

*🔹 Collections Framework

Understand List, Set, Map interfaces

Learn about ArrayList, HashSet, HashMap, etc.

Familiarity with iterators and for-each loops

*🔹 Streams and Lambdas

Understand functional programming concepts

Learn about Java Streams API

Familiarity with lambda expressions and method references

#### 🔷 2. Java Development Tools and Environment

🔹 IDE Setup

Install and configure IntelliJ IDEA or Eclipse

Familiarize with project structure and build tools

*🔹 Build Tools

Learn Maven: Understand POM files and dependencies

Learn Gradle: Understand build scripts and tasks

*🔹 Version Control

Understand Git basics (commit, push, pull)

Familiarize with branching and merging

#### 🔷 3. Spring Framework

🔹 Spring Core

Understand dependency injection and IoC

Learn about Spring Beans and lifecycle

*🔹 Spring MVC

Understand MVC architecture and components

Learn about controllers, services, and repositories

*🔹 Spring Boot

Familiarize with Spring Boot starters and auto-configuration

Understand application.properties and YAML configuration

*🔹 RESTful Web Services

Learn about REST principles and HTTP methods

Familiarize with @RestController and @RequestMapping annotations

#### 🔷 4. Database Interaction

🔹 JDBC

Understand JDBC architecture and components

Learn how to connect to a database and execute queries

*🔹 ORM with Hibernate

Familiarity with entity mapping and annotations

Understand sessions and transactions

*🔹 Spring Data JPA

Learn about repositories and CRUD operations

Understand query methods and JPQL

#### 🔷 5. Testing

🔹 Unit Testing

Learn about JUnit framework

Understand assertions and test cases

*🔹 Mocking

Familiarity with Mockito for mocking dependencies

*🔹 Integration Testing

Understand integration testing principles with Spring Boot

#### 🔷 6. Security

🔹 Spring Security

Learn about authentication and authorization

Understand security configurations and filters

*🔹 JWT and OAuth2

Familiarity with JSON Web Tokens

Learn about OAuth2 flows and implementations

#### 🔷 7. Deployment and Monitoring

🔹 Deployment

Understand deployment options (Heroku, AWS, etc.)

Learn about Docker basics

*🔹 Monitoring and Logging

Familiarity with logging frameworks (Log4j, SLF4J)

Understand application monitoring tools (Prometheus, Grafana)

This checklist can help you ensure that you cover all important aspects of Java Backend Development during your revision. Good luck!