Java Interview Help

About 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

Collections

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

Features 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

Features 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

AOP

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

REST API

What is REST HTTP PUT vs POST and PATCH 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 SOAP vs REST

Security

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

Testing

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

Devops

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

Docker

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

Kubernetes

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

AWS

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