The Ultimate Interview Preparation Guide: Land Your Java Developer Role with Confidence

Congratulations! You've taken your first steps toward launching your career as a Java developer and received an invite for an interview. Or you're still on the job hunt but want to be proactive in refreshing on topics for when the invite comes. As a junior developer, no matter what kind you are, getting your first interview can be exciting but scary. Every tech professional has been there, so we have curated a handpicked selection of articles and videos designed to assist you in preparing for your first role. Whether you're an auditory learner, learning best through listening, or a visual learner, learning best through observing. This post has everything you need to help you show you’re a developer!

General Software Engineering

• 18 Best Software Engineering Books (Builtin/Tammy Xu)

Common Interview Question Prep

• 8 Junior Software Developer Interview Questions to Practice (Codecademy)

• Top 30 Java Entry-Level Interview Questions And Answers (Java Hungry)

• 180+ Core Java Interview Questions and Answers for 2023 (Simplilearn)

Java

Interview Questions

• 180+ Core Java Interview Questions and Answers for 2023 (Simplilearn)

  • Fresher Sections  - 8, 11, 12, 13, 14, 16, 17, 18, 19, 21, 22, 23, 24, 25, 26, 27, 30, 34, 35, 36, 37, 38,39, 41, 43, 44, 45, 46, 48, 49, 50, 51, 52, 53, 54, 57, 59, 60, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74

Preparation

• Object-oriented Programming in 7 minutes (YouTube/Programming with Mosh)

• Learn Java in 14 Minutes (Seriously) (YouTube/Alex Lee)

• Java Tutorial for Beginners (YouTube/Programming with Mosh)

• Java Classes - How To Use Classes in Java (YouTube/Alex Lee)

• Abstract Classes and Methods in Java Explained in 7 Minutes (YouTube/Programming with Mosh)

• Java Exception Handling Tutorial (YouTube/Programming with Mosh)

• Java Custom Exceptions Tutorial - It's Way Easier Than You Think (YouTube/Coding with John)

• Exception Handling in Java (DigitalOcean)

• Recursion in Java Full Tutorial - How to Create Recursive Methods (YouTube/Coding with John)

• Pass the Technical Interview with Java (Codecademy)

• The HackerRank Interview Preparation Kit

• Array - Easy and First Medium

• Sorting - Easy ad First Medium

• String Manipulation - Easy and First Medium

• Design Patterns in Java | Java Design Patterns for Beginners | Design Patterns Tutorial (YouTube/Edureka)

• Design Patterns In Java: Singleton, Factory And Builder (Software Testing Help)

• Java Threads Tutorial For Beginners | Multithreading In Java (YouTube/Edureka) 

• Java Threads Tutorial 1 - Introduction to Java Threads (YouTube/ProgrammingKnowledge)

• Multithreading in Java - Everything You MUST Know (DigitalOcean)

• Garbage Collection in Java | What is GC and How does it Work in the JVM? | Types of GCs (YouTube/Geekific)

• Java Garbage Collection Basics (Oracle)

• Dependency Injection Made Simple with Java Examples | Clean Code and Best Practices (YouTube/Geekific)

Programming Exercises

• Java Program To Check Whether Two Strings Are Anagram Of Each Other (GeeksforGeeks)

• Check if Two Strings Are Anagrams in Java (Baeldung)

• 3 Different ways to print Fibonacci series in Java (GeeksforGeeks)

• How to Write a Java Program to Get the Fibonacci Series (freeCodeCamp)

• Tower of Hanoi - Algorithm and Implementation in Java (DigitalOcean)

• Java Program to Check if a String/Number is Palindrome (Programiz)

• Palindrome Java Program Tutorial (YouTube/Alex Lee)

• Java Recursion (W3Schools)

• Recursion in Java (GeeksforGeeks)

Spring / Spring Boot

Interview Questions

• Top Spring Boot Interview Questions 2023 (InterviewBit)

• 25+ Top Spring Boot Interview Questions and Answers 2023 (Simplilearn)

Preparation

• Spring Core Framework Tutorials (DigitalOcean)

• Spring Boot Interview Questions | Spring Boot Interview Preparation (YouTube/Edureka)*

* These are geared toward today’s interview questions but we suggest studying other content in combination with them.

• Guides (Spring)

• Getting Started Guides

• Building a RESTful Web Service

• Consuming a RESTful Web Service

• Building a RESTful Web Service with Spring Boot Actuator

• Accessing Relational Data using JDBC with Spring

• Securing a Web Application

• Accessing Data with JPA

• Building an Application with Spring Boot

• Tutorials  - ALL

• Spring Tutorial - Beginners to Expert (Java Guides)

• Getting Started With Spring Framework (Edureka)

• Spring Boot Tutorial for Beginners - Java Framework (YouTube/freeCodeCamp.org)

Spring JPA

Interview Questions

• Spring Data JPA Interview Questions and Answers (JPABuddy)

Preparation

• Spring Boot Tutorial | Spring Data JPA | 2021 (YouTube/Amigoscode)

• Spring Data JPA Tutorial (Java Guides)

Maven

Interview Questions

• Top Maven Interview Questions 2023 (InterviewBit)  

• Top 50 Maven Interview Questions and Answers for 2023 (Simplilearn)

Preparation

• Introduction to Maven for Beginners in 2023 (Simplilearn)

• Maven Tutorial For Beginners | Introduction To Maven | Maven Explained | Maven Tutorial (YouTube/Simplilearn)

• Working with Maven - IntelliJ IDEA Guide (JetBrains) 

• What Is Maven? | What Is Maven And How It Works? | Maven Tutorial For Beginners (YouTube/Simplilearn)

• Building Java Projects with Maven (Spring)

JUnit

Interview Questions

• Top JUnit Interview Questions 2023 (InterviewBit)

Preparation

• What Is JUnit: An Overview of the Best Java Testing Framework (Simplilearn)

• Java Unit Testing with JUnit - Tutorial - How to Create And Use Unit Tests (YouTube/Coding with John)

• What Is JUnit: An Overview of the Best Java Testing Framework (Simplilearn)

• Java Unit Testing with JUnit 5 - Interactive Course (Educative)

• Better Code, Faster: 8 Reasons Why You Should Use Unit Testing (Forte Group)

Agile

Interview Questions

• Top Agile Interview Questions 2023 (InterviewBit)

• Top 20 Agile Interview Questions 2023 (Javatpoint) 

Preparation

• What Is Agile Methodology? | Introduction to Agile Methodology in Six Minutes (YouTube/Simplilearn)

• What is an Agile framework? (Mendix)

SQL

Interview Questions

• SQL Interview Questions Cheat Sheet 2023 (InterviewBit)

• SQL Interview Questions and Answers (DigitalOcean)

Preparation

• Welcome to SQL (video) | SQL basics (Khan Academy)

• SQL Basics Cheat Sheet (LearnSQL.com)

• Learn SQL: Queries Cheatsheet (Codecademy)

• SQL Commands Cheat Sheet – How to Learn SQL in 10 Minutes (freeCodeCamp) 

• SQL Tutorial - Full Database Course for Beginners (YouTube/freeCodeCamp.org)

CI/CD

Interview Questions

• 30 Common CI/CD Interview Questions (with Answers) (Semaphore)

• CI/CD Interview Questions and Answers(2023) (InterviewBit)

Preparation

• CI/CD Pipeline: A Gentle Introduction (Semaphore) 

• What is CI/CD? (Red Hat).

System Design

• System Design for Beginners Course (YouTube/freeCodeCamp.org)

Preparing for your interview isn't just about giving the correct answers; it's about understanding and applying the underlying concepts to real-world scenarios. The resources in this guide are designed to refresh your knowledge on the foundations of the Java language, tools used, and processes that establish you as a Java developer and help you approach interview questions confidently, showcasing your true potential to future employers.