Dip Developer | Java Backend Development

Are you looking to build a real-world project using Spring Boot and MySQL? In this tutorial, we'll walk you through creating a complete Banking Service REST API that supports full CRUD operations, money transfers, deposits, and withdrawals. Whether you're preparing for interviews or enhancing your portfolio, this hands-on project will give you practical experience with Spring Boot 3, Spring Data JPA, and RESTful API design. In this post, you'll learn how to build a Banking Service REST API using: ✅ Spring Boot 3.x ✅ Java 17 ✅ MySQL ✅ Postman for API testing ✅ IntelliJ IDEA ✅ GitHub Repo : https://github.com/TheDipDeveloper/Banking-Service-Application-REST-Api By the end, you'll have a complete backend application that supports: Creating bank accounts Fetching account data Deposits and withdrawals Transferring funds between accounts Deleting accounts 🛠️ Tech Stack Java 17 Spring Boot 3.x Spring Data JPA MySQL Lombok ...

Whether you're a fresh graduate, a data analyst, or a software developer, SQL is one of the most critical skills to master for database-related roles. This guide will walk you through 30 essential SQL interview questions and answers, grouped by difficulty level: Beginner , Intermediate , and Advanced . Beginner SQL Interview Questions with Answers These questions focus on basic SQL syntax, concepts, and simple queries. What is SQL and why is it used? Answer: SQL (Structured Query Language) is used to interact with relational databases. It allows users to query, insert, update, and delete data. What are the different types of SQL statements? Answer: DDL (Data Definition Language): CREATE , ALTER , DROP DML (Data Manipulation Language): SELECT , INSERT , UPDATE , DELETE DCL (Data Control Language): GRANT , REVOKE TCL (Transaction Control Language): COMMIT , ROLLBACK , SAVEPOINT What is the difference between WHERE and HAVING ? Answer: WHERE filters...

  📘 Spring Data JPA Interview Questions (with Answers, Explanations & Use Cases) 1. What is JPA and how is it related to Spring Data JPA? Answer: JPA (Java Persistence API) is a Java specification for managing relational data. Spring Data JPA is a part of Spring Data that simplifies JPA usage by reducing boilerplate code. Use Case: Persisting Java objects (like User ) to a relational database without writing SQL. 2. What are the key annotations used in JPA? Answer: @Entity , @Table , @Id , @GeneratedValue , @Column , @ManyToOne , @OneToMany , etc. Explanation: These annotations map Java objects to database tables and relationships. Use Case: Creating a User entity with an auto-generated ID and fields mapped to table columns. 3. What is the difference between JPA and Hibernate? Answer: JPA is a specification; Hibernate is an implementation of that specification. Use Case: Using Hibernate as the default JPA provider in Spring Boot. 4. How do you define a p...