Dip Developer | Java Backend Development

  🟢 30 Basic Java Interview Questions for Freshers (with Examples & Use Cases) If you are preparing for interviews in service-based companies like TCS, Infosys, Accenture, Wipro, Tech Mahindra , these are the most commonly asked Java interview questions for freshers (<1 year experience) . Each question has: ✅ Simple explanation ✅ Real-life use case ✅ Small code example 1. What are the main features of Java? Answer: Object-Oriented Platform Independent Simple, Secure, Robust Multithreaded & Portable 👉 Use Case: Run same .class file on Windows & Linux. public class HelloWorld { public static void main (String[] args) { System.out.println( "Java is platform independent!" ); } } 2. What is JVM, JRE, and JDK? Answer: JVM: Runs Java bytecode. JRE: Libraries + JVM. JDK: JRE + tools (javac, debugger). // javac HelloWorld.java → JDK compiles to bytecode // java HelloWorld → JRE runs program inside JVM 3....

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...