Q1. What are the core annotations used in a Spring Boot applications? A1. Annotations are used to configure & customize a Spring boot application. @SpringBootApplication This is a core class level annotation that marks the main class of a Spring Boot application, … Read more ›...
Big Data & Java Success
Prepare to fast-track & go places with 800+ Java & Big Data Interview questions uniquely answered with code.
Categories
- Home
- About
- Career Tips
- Membership
Blog Archives
03: Understanding Big O notations with Java
Q1. Have you seen job advertisements requiring Java candidates to work in real-time or high volume transaction processing systems? A1. If you are applying for such jobs, you can be quizzed on Big O notation. Here are some basics to brush up on. … Read more ›...
This content is for 100-Day-Full-Access, 200-Day-Full-Access, 365-Day-Full-Access, and 2-Year-Full-Access members only.
Register
50+ Free Java FAQs
50+ Free Big Data FAQs
Already a member? Log in here
03: Understanding Git terms origin, master, and head
Q1. What is a .git folder? A1. Like .SVN folder for subversion holding the metat data, .git folder holds the Git meta data like remote repository, branch names, etc. If you do
|
1 |
cat head |
it shows that you are on the branch “ … Read more ›...
This content is for 100-Day-Full-Access, 200-Day-Full-Access, 365-Day-Full-Access, and 2-Year-Full-Access members only.
Register
50+ Free Java FAQs
50+ Free Big Data FAQs
Already a member? Log in here
04 17 Spring bean life cycles & scopes FAQs
Q1. Does Spring dependency injection happen during compile time or runtime? A1. Runtime during creating an object. Q2. What is the difference between prototype scope and singleton scope? Which one is the default? A2.Singleton means single bean instance per IoC container, … Read more ›...
This content is for 100-Day-Full-Access, 200-Day-Full-Access, 365-Day-Full-Access, and 2-Year-Full-Access members only.
Register
50+ Free Java FAQs
50+ Free Big Data FAQs
Already a member? Log in here
04: 7 JSP interview questions and answers
JSF or JavaScript based frameworks like angularjs, ember, etc are more popular than JSPs for web developemnt. Q1. What is a JSP? How does it differ from a Servlet? A1. JSP stands for Java Server Pages. JSP technology extends the Servlet technology, which means anything you can do with a...
This content is for 100-Day-Full-Access, 200-Day-Full-Access, 365-Day-Full-Access, and 2-Year-Full-Access members only.
Register
50+ Free Java FAQs
50+ Free Big Data FAQs
Already a member? Log in here
04: As a Java developer, can you think of a time where you ……?
It really pays to jog your memory prior to job interviews to ace the open-ended questions like……As a Java developer, can you think of a time where you…….? Q1. Can you think of a time where you accomplished QuickWins for your company? A1. … Read more ›...
This content is for 100-Day-Full-Access, 200-Day-Full-Access, 365-Day-Full-Access, and 2-Year-Full-Access members only.
Register
50+ Free Java FAQs
50+ Free Big Data FAQs
Already a member? Log in here
04: Git Merging Vs rebasing must know interview questions and answers
Q1. What do you understand by the terms merging and rebasing? Can you explain both with a daiagram? A1. Both of these commands are designed to integrate changes from one branch into another branch—they just do it in very different ways. … Read more ›...
This content is for 100-Day-Full-Access, 200-Day-Full-Access, 365-Day-Full-Access, and 2-Year-Full-Access members only.
Register
50+ Free Java FAQs
50+ Free Big Data FAQs
Already a member? Log in here
04: How to go about designing a medium size JEE app?
A very popular open-ended question to judge your Java/JEE experience. Q. How would you go about designing a medium sized JEE application? A. Don’t start with 3-tier architecture, logical layers, Spring/Hibernate framework etc. The phases of designing any systems are: Requirements Gathering => … Read more ›...
This content is for 100-Day-Full-Access, 200-Day-Full-Access, 365-Day-Full-Access, and 2-Year-Full-Access members only.
Register
50+ Free Java FAQs
50+ Free Big Data FAQs
Already a member? Log in here
04: Java 9 to 20 features interview Q&As – Records
Q01: What is a data class?
A01: A data class refers to a class that contains only fields and methods for accessing them via getters and setters. These are simply containers for data used by other classes.
Q02: What exactly makes creating data classes in Java so tedious?
…
04: Kubernetes (i.e k8s) interview Q&As – Volumes, PVs, PVCs & StorageClass
Q01. What is the difference between Docker & Kubernetes Volumes? A01. Docker Volume and Kubernetes Persistent Volume serve similar purposes, but they differ in a number of ways. a) Docker Volumes are used in Docker environments, … Read more ›...
This content is for 100-Day-Full-Access, 200-Day-Full-Access, 365-Day-Full-Access, and 2-Year-Full-Access members only.
Register
50+ Free Java FAQs
50+ Free Big Data FAQs
Already a member? Log in here
04: Microservices Architecture design patterns & considerations interview Q&As – Part 3
This extends 03: Microservices Architecture design patterns & considerations interview Q&As – Part 2. 4. Cross-cutting concern patterns Microservices require various cross-cutting concerns such as metrics, reporting exceptions to an exception tracker, logging, distributed tracing, health checks, externalized configuration, and security. Additionally, a service may need to handle service discovery...
This content is for 100-Day-Full-Access, 200-Day-Full-Access, 365-Day-Full-Access, and 2-Year-Full-Access members only.
Register
50+ Free Java FAQs
50+ Free Big Data FAQs
Already a member? Log in here
04: Q18 Explain abstraction, encapsulation, Inheritance, and polymorphism with the given Java code?
Q18. Given code:
|
1 2 3 |
List<String> list = new ArrayList<>(); list.add("Java"); list.add("JEE"); |
A18. Firstly, let’s take abstraction and encapsulation as the difference is subtle. Abstraction is often not possible without encapsulation because if a class exposes its internal state, it can’t change its inner workings.
…
05: 9 Spring Bean scopes interview Q&A
Q1. Does Spring dependency injection happen during compile time or runtime? A1. Runtime during creating an object. Q2. What is the difference between prototype scope and singleton scope? Which one is the default? A2. Singleton means single bean instance per IoC container, … Read more ›...
This content is for 100-Day-Full-Access, 200-Day-Full-Access, 365-Day-Full-Access, and 2-Year-Full-Access members only.
Register
50+ Free Java FAQs
50+ Free Big Data FAQs
Already a member? Log in here
300+ Java Interview FAQs
300 + Big Data Interview FAQs
16+ Java Tech Key Areas
10+ Companion Techs Q&As
300+ Java Interview Q&As
Tutorials on Java & Big Data
In 1999, I pivoted from mechanical engineering to become a self-taught Java expert. Over the past 19+ years, I have built a high-demand contracting career, delivering mission-critical solutions for 13+ top-tier organisations. With a proven track record that has generated over 130+ job offers, I help enterprises solve complex data challenges at scale.
Author of the book "Java/J2EE job interview companion", which sold 35,000+ copies on amazon.com & superseded by this site with 2000+ registered users.
Amazon.com profile | LinkedIn | LinkedIn Group | YouTube
Email: java-interview@hotmail.com
Author of the book "Java/J2EE job interview companion", which sold 35,000+ copies on amazon.com & superseded by this site with 2000+ registered users.
Amazon.com profile | LinkedIn | LinkedIn Group | YouTube
Email: java-interview@hotmail.com
Latest posts by Arulkumaran Kumaraswamipillai (see all)
“
I have a good news, I got job offer. I like to share with you from my bottom of my heart feeling thankful to you.
Jithendra
via LinkedIn
50+ Free Java & Big Data Interview Q&As
Disclaimer
The contents in this Java-Success are copyrighted and from EmpoweringTech pty ltd. The EmpoweringTech pty ltd has the right to correct or enhance the current content without any prior notice. These are general advice only, and one needs to take his/her own circumstances into consideration. The EmpoweringTech pty ltd will not be held liable for any damages caused or alleged to be caused either directly or indirectly by these materials and resources. Any trademarked names or labels used in this blog remain the property of their respective trademark owners. Links to external sites do not imply endorsement of the linked-to sites. Privacy Policy
© 2026
Big Data & Java Success
Responsive WordPress Theme
powered by
CyberChimps
Top
Scroll Up