300+ Java EE interview Questions & Answers

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Module 1 Describe the recent Java application that you had worked on from a 100 feet?
Describing the recent enterprise Java application you had worked on or an application you are proud of from a 100 feet. If you are a beginner with no industry experience, talk about your toy project(s) in GitHub and any open-source contribution.
Unit 1 12 High-level JEE architecture overviews at 100 feet with diagrams  - Preview
Unit 2 Describe a typical Java EE architecture?  - Preview
Unit 3 11 JEE application integration styles with diagrams  - Preview
Module 2 JEE Overview
JEE Overview Interview Q&As
Unit 1 10 JEE overview interview Q&As
Unit 2 4 JEE bean validation, asynchronous processing & web fragments interview Q&As
Module 3 Web Basics
Web basics like HTTP paradigm, request parameters, sessions, headers, cookies, web patterns, etc
Unit 1 4 Http methods, content types, headers, MIME types, cookies, etc Q&As
Unit 2 12 Web development basics interview Q&AS
Unit 3 8 Web development design patterns interview Q&As
Module 4 Java Servlets
Java Servlets Interview Q&As
Unit 1 21 Java servlet interview Q&As
Unit 2 5 web.xml, ServletConfig, and ServletContext interview Q&As
Module 5 View Technologies in Java Web applications
View Technologies in Java Web applications like client-side vs server-side, JSPs, angularjs.
Unit 1 Client-side vs server side view technologies interview Q&As
Unit 2 13 AngularJs interview Q&As
Unit 3 7 JSP interview Q&As
Unit 4 9 JSF interview Q&As
Module 6 Java Web Services
RESTful & SOAP Web Services Interview Q&As
Unit 1 6 must know Java Web Services Interview Q&As
Unit 2 6 Micro & web services interview Q&As
Unit 3 6 RESTful web services interview Q&As
Unit 4 JAX-RS how to create a RESTFul Web Service in Java?
Unit 5 5 JAXB interview Questions & Answers
Unit 6 RESTful interview question on 12 rules to remember
Unit 7 REST constraints (i.e. design rules) interview Q&As
Unit 8 HATEOAS question on RESTful web service
Unit 9 HATEOAS RESTFul Service with Spring tutorial
Unit 10 11 SOAP web services interview Q&As
Unit 11 SOAP Web Service Styles Interview Q&As
Module 7 Java and Spring Microservices
With microservices, your entire application is decentralized and decoupled into services that act as separate entities.
Unit 1 10+ Domain Driven Design (i.e. DDD) Interview Q&As
Unit 2 10+ Key Microservices Interview Questions Answered
Unit 3 7 Apache Kafka interview Q&As
Unit 4 DevOps, Kubernetes, Docker & Microservices Q&As
Module 8 Spring Core
Spring core interview Q&As
Unit 1 9 Spring framework overview interview Q&As
Unit 2 DIP, DI, Spring IoC and loose coupling in detail Q&As
Unit 3 4 Spring bean lifecycle interview Q&As
Unit 4 17 Spring bean scopes interview Q&As
Module 9 Spring MVC and Spring Boot
Spring MVC & Spring Boot interview Q&As
Unit 1 11 Spring MVC interview Q&As
Unit 2 15 Spring boot Interview Q&As
Unit 3 Spring Cloud Microservices interview Q&As
Module 10 JPA and Hibernate
JPA & Hibernate interview Q&AS
Unit 1 8 JPA interview Q&As
Unit 2 8 Hibernate basics interview Q&As
Unit 3 8 Hibernate object states, lazy loading & optimistic locking Q&As
Module 11 JDBC, Transaction Management & JTA
JDBC, Transaction Management & JTA interview Q&As
Unit 1 5 JDBC overview interview Q&As
Unit 2 12 JDBC basics interview Q&As
Unit 3 9 Java Transaction Management interview Q&As
Unit 4 8 JTA interview Q&As
Module 12 JMS, JNDI, and JMX
JMS, JNDI, and JMX interview Q&As
Unit 1 16 JMS interview Q&As
Unit 2 9 JNDI & LDAP interview Q&As
Unit 3 5 JMX and MBean interview Q&As
Module 13 Database & SQL
Database & SQL interview Q&As
Unit 1 15 Database interview Q&As
Unit 2 15 SQL interview Q&As
Unit 3 3 SQL subqueries interview Q&As
Module 14 Unix & Regex
Unix & Regex Interview Q&As
Unit 1 14 Unix interview Q&As
Unit 2 Power of regex for string manipulation
Unit 3 9 Regular expressions (aka regex) in Java interview Q&As
Module 15 JSON, XML & XSD
JSON, XML & XSD interview Q&As
Unit 1 17 XML interview Q&As
Unit 2 11 XSD interview Q&As
Unit 3 7 Processing XML in Java interview Q&As
Unit 4 5 JAXB interview Q&As
Unit 5 6 JSON interview Q&As
Unit 6 Processing JSON in Java
Module 16 UML & ERD
UML & ERD interview Q&As
Unit 1 12 UML interview Q&As
Unit 2 10 ERD (i.e. Entity-Relationship Diagrams) interview Q&As
Module 17 Maven & Git
Maven & Git interview Q&As
Unit 1 12 Maven build tool interview Q&As
Unit 2 7 Maven, Nexus, and other build tools Q&As
Unit 3 8 Git Source control system interview Q&As
Unit 4 6 Git Q&As on pull requests, rebasing, merging, etc
Module 18 JavaScript
JavaScript interview Q&As
Unit 1 3 Java Vs. JavaScript interview Q&As
Unit 2 10 JavaScript Interview Q&As on variable scopes & context
Unit 3 10 JavaScript interview Q&As on functions, prototypes, “this” variable, binding, etc
Unit 4 10 JavaScript interview Q&As on functions
Unit 5 7 JavaScript interview Q&As on closures
Module 19 SDLC
Software Development Life Cycle interview Q&As
Unit 1 5 SDLC interview Q&As for Java developers
Unit 2 18 Agile development methodology interview Q&As
Unit 3 30+ SDLC activities performed by developers
Module 20 Enterprise Code Quality
Enterprise Code Quality Interview Q&As
Unit 1 3 Ensuring code quality in Java applications Q&As
Unit 2 6 Unit testing Spring boot applications Q&As
Unit 3 4 Q&As on unit testing the DAO layer
Unit 4 Unit testing Spring controller
Unit 5 BDD development in Java
Module 21 Judging Experience
Judging Experience interview Q&As
Unit 1 3 How would you go about ..." Q&As to judge experience
Unit 2 11 In your Java experience, what are ... Q&As
Unit 3 7 Interview Q&As on debugging skills
Unit 4 18 Java scenarios based interview Q&As
Unit 5 9 SQL scenarios Q&As judge experience
Unit 6 How would you go about designing Java apps with UML diagrams?