258 Tutorials Available in interview

What is the difference between synchronous, Asynchronous calls and Callbacks

Important key concepts of Agile Project Management (Scrum)

What is Git Tagging

What is Git Reset and Its types

What is Git Stash and Git Squash

What is Git cherry pick

What is Git Merge

What is Git Merging, Git Rebasing and Git Bisect and differences between git merge and git rebase

What is git clone, git fetch and git pull in GIT

What is Branching Strategy and its types in GIT

What is Snapshot in Git and the purpose of Snapshot

What is Version Control System or VCM or git

Why is `@PreAuthorize` is not working on Rest Controller in Springboot

java springboot interview

How to Fix the Java Exception java.lang.UnsupportedClassVersionError Unsupported major.minor version

What is Execution context class in Java

java springboot interview

How to Hit a HTTP POST API using JSON as a Request body in Java

How to convert an integer to an array of digits in Java

What is Manual Testing and Why is it required

Why do we need interfaces in Java

Convert MySQL database from MyISAM to InnoDB

What is the difference between Hashtable and ConcurrentHashMap in Java

How to resolve the Error return type is incompatible in Java

How to Check if a variable is between two numbers with Java

What is CLASSPATH in Java

How does synchronized work in Java

How to use threads and recursion in Java to print Fibonacci numbers

What is connection pooling in Java

What is the best way to store passwords in Java

How do you kill a Thread in Java

What is mutex and semaphore in Java and its differences

Why String is Immutable or Final in Java

Are Synchronized Methods Slower In Single Threaded Applications in Java

What is a SubString and Memory Leak in Java

What is Encoding and Decoding in Java

What are Maven Plugins

Is it possible to use Object.wait(millisec) to simulate sleep in Java Threads

What are the different types of ViewResolver in Spring MVC

springboot interview

Write a program to find Duplicate character in a String Java

What is a Maven Repository

What is the difference between Executors.newCachedThreadPool() and Executors.newFixedThreadPool() in Java MultiThreading

Log4J Vulnerability (Log4Shell) Explained - for Java developers

What is POM (Project Object Model) And Pom.Xml in Maven

What are WebSockets and How is it different from HTTP

What is Hibernate Interceptor in Java Application Development

Is Oracle JDK Free again - for Java developers

How to publish your local web server to internet without any port forwarding

What are Primitive and Wrapper Classes in Java

What is Web 3.0 Blockchain, Its building blocks, and Evolution of the Internet

Twitter User must have a verified phone number on file prior to submitting application.

How to fetch top 10 trending hashtags from Twitter in India using twitter4j in Java

What is Singleton Design Pattern in Java and Why it is used

Should try...catch go inside or outside a loop in Java

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What is Servlet and How does it work

What is the difference between @Mock and @InjectMocks

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How an AJAX Request works

What is Race Condition In MultiThreading Java

What is the difference between Junit and Mockito

java springboot interview

How to find a file recursively in Java

Java IO - Interview Questions

What is Synchronized in Java MultiThreading

How to find age using date of birth in Java

How to print Thread numbers in MultiThreading Java

How to check the version of java installed on my computer

What is join method used for in MultiThreading Java

How to get the width and height of a string in Java

Introduction to Java Thread Profiling

How to convert date in to yyyy-MM-dd Format in Java

What is isAlive method used for in MultiThreading Java

Difference between Map and Flat Map

How to create and run multiple threads using for loop

Advanced Java Web Interview Questions And Answers

How to resolve Web server failed to start. Port 8080 was already in use

How exception handling effects the performance in Java

What is MultiThreading and How to create a thread in Java

What are the advantages and disadvantages in Microservices Architecture

microservices interview

How to resolve the Error opening registry key Java

Important JDBC Interview questions and answers for Java Developer interview

How to undo the most recent local commits in Git

Important Java 8 Interview Questions

How to use java.net.URLConnection to send and handle HTTP requests

What is Waterfall Model, Spiral Model and VV Model/Verification Validation Model/V Model in SDLC

How to resolve "java.lang.OutOfMemoryError Java heap space" error

What is SDLC and its phases

The difference between the Runnable and Callable interfaces in Java

What is the difference between Error, Bug, Defect, and Failure

How can an application use multiple cores or CPUs in Java

What are the system design Specifications and Features of Cache

What is Cache and its benefits

How to do system design for a Movie Ticket Booking System like bookmyshow.com,fandango.com

What is the difference between “implements Runnable” vs “extends Thread” in Java

How to do low level system design for a Logging Framework like Log4J

What is Distributed Cache

Wap to convert String of vowels and consonants into 0's and 1's and print the decimal value of the binary string in Java and Python

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Simple code Naming things and Naming Conventions

8 Must-Have Git Commands

How to calculate Java Objects, Arrays, Primitives, and Complex Classes. Checking calculated size correctness using JProfiler.

How to Convert DOCX to HTML in Java

How to remove substring from String in Java

Java virtual Machine(JVM) and its architecture

Can we restrict visibility of derived method in Java and What is visibility control in java

What is Builder Pattern in Java

What is java.lang.NoClassDefFoundError in Java and How to resolve it

What Down casting in Java

What is java.lang.ClassNotFoundException in Java and How to resolve it

What are Access Specifiers in Java

Wap to find if a Given Array is Monotonic in Java

How to remove duplicates and sort the array without using inbuilt functions like .sort or sorting algorithms from an unsorted array

WAP to find the sum of all the numbers in a list using in Java 8

What is StringJoiner and its uses in Java 8 with an example

The Performance Impact of java.lang.System.getProperty()

Can You Override Static Method in Java

Does Java Support Pass by Value or Pass by Reference

Difference between Factory and Abstract Factory Design Pattern in Java

Polymorphism, Overloading, and Overriding in Java and Object Oriented Programming

What is Encapsulation in Java and OOP with Example

What is Inheritance in Java with example - Object Oriented Programming

What is Object in Java and Object Oriented Programming? Example Tutorial

Difference between Inheritance and Composition in Java and Object Oriented Programming

OOPs Concepts in Java with Basic Examples

Basic Annotations in Spring Boot

springboot interview

Object-oriented Programming vs. Functional Programming Which Is Better?

How to make POST and PATCH requests idempotent

springboot interview

Fetching a DTO With a To-Many Association

Which build tool is more commonly used for Spring Boot, Maven or Gradle?

springboot interview

What is a Race Condition

How to catch multiple Java exceptions in the same catch clause

What are checked vs unchecked exceptions in Java

Vs code shortcuts for Developers in Windows

Is it IllegalArgumentException or NullPointerException for a null parameter in Java

What is the difference between DAO and Repository Patterns

How to generate DAO(data access object) using spring roo

How to find the minimum or least value in an Integer List using Java 8

What is Association Mapping and examples of One to One, Many to Many and One to Many and Many to One relationships

What is the difference between UNION and UNION ALL

What is the difference between query, native query, named query and typed query

How to know which Java thread is hogging the CPU

What is the difference between "INNER JOIN" and "OUTER JOIN"

How many threads can a Java VM support

How to Avoid java.lang.NullPointerException in Java

How to convert a String into an int in Java

WAP to replace the name of a file with special character instead of spaces in Java

Write a program to List out files and directories in the specified directory or folder in Java

What are important Threading Techniques & Concepts in Java

Is it possible view/pause/kill a particular thread from a different java program running on the same JVM

How to make your collections thread-safe?

What are the best naming conventions for threads in Java

In Java, do I need to declare my collection synchronized if it's read-only

Synchronizing on String objects in Java

How many threads should I use in my Java program

How to implement simple threading with a fixed number of worker Threads

What is the difference between notify() and notifyAll() in Threads.

What would make a single task executor stop processing tasks in Java Threads.

How can you ensure a block of code can not be interrupted by any other Thread in Java

How to test methods that call System.exit() in Java

How are Java Thread priorities translated to an OS thread priority

What are packages in Java

How to parse logs written by multiple Threads

What are the benefits of Performance Optimization in Java

What is Garbage Collection Performance Tuning in Java

What are the best Coding Practices to be followed while writing Java code in order to avoid performance issues

How to create a memory leak in Java

Why is processing a sorted array faster than processing an unsorted array in Java

How to convert a String to an int in Java

What are MVP and MVC and what is the difference between MVP and MVC

What is a serialVersionUID and why should I use it in Java

When to use LinkedList over ArrayList in Java

What is the difference between StringBuilder and StringBuffer in Java

Which concurrent Queue implementation, should I use it in Java

How to avoid NullPointerException in Java

How do I read / convert an InputStream into a String in Java

What is the difference between a synchronized method and synchronized block in Java

How to make an ArrayList Read Only in Java

How do I efficiently iterate over each entry in a Java Map

What are the differences between a HashMap and a Hashtable in Java

What is Semantic Monitoring in Microservices

microservices interview

Restful web services interview questions

springboot interview

WAP to print the sum of harmonic progression series

What is a Java bean

WAP to define a method which returns the sum of digits of the given two digit number in Java

Java JDBC important interview questions

Real time example of a singleton design pattern in Java

What is the difference between Static and Dynamic web application

What are available JDBC drivers and difference between them and when to use

What are the steps to connect to a database using JDBC API

What is frontend and backend web development

What is statement, prepared statement and callable statement in JDBC and Why are they used

What is final keyword in java

What is Instance Initializer block in Java

What is instanceof operator in Java

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What is transaction management and ACID properties in JDBC

What is super keyword in java

What is Covariant Return Type in java

What is method overriding in Java

java J2ee interview

What is method overloading in Java

What is Polymorphism in Java

Java Static keyword real time example in Java

WAP to check sorting order in list in Java

WAP to create a thread using lambda expression and print “Hello World” in Java

java Java8 interview

Java interview question on interfaces implemented by class with same default method in two interfaces

What is the difference between final, finally, finalize in Java

WAP to Concatenate a given string to the end of another string in Java

In Java, what is the best way to determine the size of an object

What is Polling Publisher Pattern in Microservices

microservices interview

What is a Transactional Log Trailing in Microservices

microservices interview

What is a Transactional Outbox Table in Microservices

microservices interview

What is a Strangler Application in Microservices

microservices interview

How do I generate random integers within a specific range in Java

What is Event Sourcing in Microservices

microservices interview

What is CQRS Pattern in Microservices

microservices interview

What is the difference between public, protected, package-private and private in Java

What is Data Offloading in Microservices

microservices interview

What is Scaling Cube in Microservices

microservices interview

Does Java support default parameter values

What is Container in Microservices

microservices interview

What is Mike Cohen's Test pyramid in Microservices

microservices interview

What is Side Car Pattern in the Microservices

microservices interview

What is Server side Service Discovery in the Microservices

microservices interview

What is Client side Service Discovery in the Microservices

microservices interview

What is a Service Discovery and how is it implemented in the Microservices

microservices interview

What is Idempotence and its usages in Microservices

microservices interview

What is OAuth and Why is it important in Microservices

microservices interview

What is Continuous Monitoring in Microservices

microservices interview

What is a Spring Bean Lifecycle

springboot interview

What are Client Certificates in Microservices

microservices interview

What is a CDC or Consumer Defined Contract in Microservice

microservices interview

What is the difference between Spring, Spring Boot and Spring MVC

springboot interview

How do independent Microservices communicate with each other

microservices interview

What is the load factor of Hashmap in Java

What are the modules of Spring framework

springboot interview

What is Bounded Context in Microservices

microservices interview

How to implement bubble sort by using only one for loop

What is a Orchestration Pattern in Microservices

microservices interview

Why don't Java's +=, -=, *=, /= compound assignment operators require casting?

What is a Choreography Pattern in Microservices

microservices interview

Write a Comparator in Java to compare two employees based upon name, age and address

What is a Saga Pattern in Microservices and Why distributed transactions named as SAGA?

microservices interview

What is a Two-Phase Commit Transactions (2PC) in Microservices

microservices interview

How to break Singleton Design pattern in Java

What is a Distributed Transaction in Microservices

microservices interview

What is the difference between writing a property on application.yml or bootstrap.yml in spring boot

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What is the difference between an Event and a Message in Microservices

microservices interview

How to add context path to Spring Boot application

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What are the ways to build Microservices

microservices interview

What is Circuit Breaker Pattern in Microservices

microservices interview

What is Blast Radius in Microservices

microservices interview

How to set active profile and config location from command line in spring boot

java interview springboot

How does the Java 'for each' loop work

What is Cohesion? Is High Cohesion or Low Cohesion better in Microservices

microservices interview

What is Coupling and What are the types of Coupling in Microservices

microservices interview

Twitter Bootstrap Development Introduction

SSL Configuration in Apache MINA Server

An Introduction to Apache Mina Server

How to Run code after Spring Boot application starts

springboot interview

Tomcat Performance Tuning in Production Server

MySQL Backup/Restore in Windows, Linux and using Java Program

Apache Mina - Simple Client/Server Application

Float, Double and BigDecimal with Financial Calculation

Java new features that needs to be at your finger tips