Java Interview Help

Quickly review java, spring boot, micro services, rest, devops and cloud for java interviews

What you’ll learn

  • How to talk about your experience and your project.
  • Frequently asked Core Java Interview Questions.
  • Collections and Multithreading Questions.
  • Java 8 to Latest Feature Review.
  • Spring Boot Interview Questions.
  • Spring Data JPA and Hibernate Interview Questions.
  • Microservice Interview Questions.
  • REST and SOAP.
  • JMS – Java Messaging Service.
  • Maven Interview Questions.
  • Docker Interview Questions.
  • Kubernetes Interview Questions.
  • AWS Interview Questions.
  • and more.

Course Content

  • Introduction –> 1 lecture • 1min.
  • You,Your Resume and Your project –> 4 lectures • 17min.
  • Core Java –> 12 lectures • 18min.
  • Collections –> 11 lectures • 10min.
  • Multi Threading –> 5 lectures • 4min.
  • Java 8 –> 12 lectures • 13min.
  • Java 9 –> 4 lectures • 3min.
  • Java 10 –> 3 lectures • 3min.
  • Java 11 –> 4 lectures • 3min.
  • Java 12 –> 4 lectures • 3min.
  • Java 13 and 14 Features –> 4 lectures • 3min.
  • Java 15 Features –> 2 lectures • 1min.
  • Coding Problems –> 6 lectures • 21min.
  • Spring Boot –> 11 lectures • 16min.
  • Spring Data JPA and Hibernate –> 12 lectures • 35min.
  • AOP –> 2 lectures • 7min.
  • Transaction Management –> 5 lectures • 14min.
  • Microservices –> 13 lectures • 15min.
  • REST API –> 12 lectures • 31min.
  • SOAP Webservices –> 10 lectures • 9min.
  • Security –> 19 lectures • 18min.
  • Java Messaging Service –> 8 lectures • 8min.
  • Design Patterns and Principles –> 7 lectures • 12min.
  • Testing and Code Quality –> 10 lectures • 11min.
  • GIT –> 6 lectures • 4min.
  • Build Tools –> 4 lectures • 4min.
  • Devops –> 8 lectures • 8min.
  • Docker –> 10 lectures • 10min.
  • Kubernetes –> 13 lectures • 11min.
  • AWS –> 18 lectures • 15min.
  • AWS Lambda –> 13 lectures • 11min.
  • Spring Cloud –> 8 lectures • 9min.
  • Kafka –> 10 lectures • 12min.
  • SQL –> 11 lectures • 13min.
  • Helm –> 11 lectures • 11min.
  • Agile and Scrum Process –> 5 lectures • 7min.
  • Wrap Up –> 1 lecture • 1min.

Java Interview Help


Sample of the reviews:

It looks really helpful, I will surely use those templates to showcase my own. I came here for java interview question but you reminded me that presentation skills are very imp to grab and opportunity and showcase the experience. Thanks a lot! – Hrishikesh Raverkar

So far the Best Java Web Dev Interview Prep course available on udemy! – Parth

All source code is available for download

Responsive Instructor – All questions answered within 24 hours

Professional video and audio recordings (check the free previews)


If you are a Java Developer preparing for an interview then this course is for you.This course is for students who have taken my java courses  or any junior, mid level or senior java developers who want to crack java interviews.

Talking about You and Your project

Tell us about yourself

About Me Preparation Template

Your recent project

Common Core Java interview Questions

What are the important components of java

What are constructors

equals method vs == operator

final finally and finalize

What are generics



What are the different collection Types

ArrayList vs LinkList

Vector vs ArrayList

HashMap vs LinkedHashmap

Failfast vs Failsafe Iterators

How to create a Generic Class

Producer Consumer Pattern

Comparable vs Comparator

What are concurrent collections


Multi Threading

How to create threads

What is Synchronization

What are class level locks

What are synchronized blocks

How do threads Communicate


Java 8


What is a Lambda

What are Functional Interface

What is the Use Lambda

What is a Predicate

What are Predicate Joins

What is a Function

What are Default methods on interfaces

How to use Stream Filter

Other Methods on Stream

Map vs Filter


Java 9

What are private methods in interfaces

What are Immutable Collections

Stream API Updates

Enhancements to try with resource


Java 10


What is var

Collectors API updates


Java 11

String API Updates

File API Updates

isEmpty method


Java 12

String API Updates

Compact Number Format

More Unicode Chars

Collectors API updates


Java 13 and 14 Features

What is instanceof Pattern Matching

What is a Record

What are Helpful NullPointerExceptions

What are Switch Expressions


Java 15 Features

What are Sealed Classes

Record Enhancements


Spring Boot

What is Dependency Injection and IOC

What are the Spring Bean Scopes

Prototype in Singleton

What are HTTP Scopes

What are the Problems with traditional spring

Why use Spring Boot

What is @SpringBootApplication

What is @SpringBootTest


Spring Data JPA and Hibernate

What is Spring Data JPA

How to use Spring Data JPA

Create Coupon Service Data Access Layer

Create Product Service Data Access Layer

What are the different Entity Object States

Wha are various JPA Associations

What is Cascading

What is Lazy Loading

What are two levels of caching

How to configure Second Level Cache



What is AOP

Wha is the AOP Terminology


Transaction Management

What is a Transaction

What are transaction ACID Properties

What are Distributed Transactions

What are the Transaction Isolation Levels

What is Optimistic vs Pessimistic Locking


Micro Services

What is a Monolithic Application

What are Microservices

Why Microservices

REST vs Messaging



What is REST


How did you create REST API

Create Coupon Service REST API

Create Product Service REST API

Use RestTemplate

Test End To End

What are Spring Boot Profiles


SOAP Webservices

What is SOAP

What are the Java EE Web Service Standards

What are the Two Types of SOAP Design

What is WSDL

What is the WSDL Structure

What is the Top Down approach

What is the Bottom Up Design

What is a SOAP Client

What is MTOM




What are the Components of Spring Security

How did you secure your REST APIs

What is OAuth

What are the Key Components in OAuth

What is the OAuth Workflow

What are the OAuth Grant Types

What are the Different Grant Types

What is JWT

Hot to configure JWT

How to rotate tokens

How to use Tokens with Frontends

What is CSRF

How to prevent CSRFs

What is CORS


Java Messaging Service

What is messaging

Why Messaging

What is JMS

What is the KEY JMS API

Two Types of messaging

JMS Transactions

What is Message Grouping


What is. a MDB

Design Patterns

What are the Design Patterns you have used

What are Singleton Best Practices



Wha is Unit Testing

What is Mocking

What are the various Testing Tools you have used

What are the important JUnit 5 and Mockito annotations



Continuous Integration vs Delivery vs Deployment

What is Jenkins

How to create a Jenkinsfile

What are the Steps to automate a deployment

How to passParams and Inputs to Jenkins Build


Build Tools

What the different Maven Scopes

snapshots vs release

How to Control Dependencies

How to Override a Transitive Dependency Version



What is Containerization

What is Docker

What are the Docker Components and Workflow

Why Docker

What are some of the Docker Commands you have used

What are Docker Volumes

Volumes vs Bind Mounts

How did you dockerize your application

What is docker compose



What is Container Orchestration

What is Kubernetes

What is a Pod

What is a ReplicaSet

What is a Deployment

What is a Service

What are different Service Types

What are Namespaces

Explain Kubenetes Architecture

Volumes vs PV

What are PV and PVC

How to use a PVC

What are Config Maps and Secrets



What are Regions Zones and Edge Locations

What is EC2

What is a AMI

What are Spot Instances

Public vs Elastic IP

What are EC2 instance States

How to Connect to a linux instance

How to Secure Ec2 instance

How to do Load Balancing

How to use Auto Scaling

Create custom user

What is SNS

How to Send Notifications

What is Cloudwatch

S3 vs EBS vs EFS

What are the S3 Storage Classes

What is CloudFormation

RDS vs DynamoDB

What is Serverless

What is AWS Lambda


Spring Cloud

What is Spring Cloud

What is Service Registration and Discovery

How to use Eureka Server

How to do Client side Load Balancing

What is API Gateway

How to use API Gateway

What are Sleuth and Zipkin

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