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JMeter for performance testing REST services with BeanShell

This post extends 8 JMeter Performance testing Interview Q&As to cover JSON HTTP post. Now a days, a single page interactive web sites are very popular, and they post JSON based data back to the server to create a new record or to update an existing record. Step 1: Firstly,...

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Monitoring/Profiling Java applications interview Q&A

Q1 How will you go about monitoring your Java application for potential performance or memory issues? A1 1. Visual VM for monitoring Java memory, CPU, threads, etc VisualVM is a visual tool integrating several command-line JDK tools and lightweight profiling capabilities. Designed for both production and development time use, …...

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Q01-Q28: Top 50+ FAQ JEE interview Q&As

Java interview questions & answers on EE (i.e. Enterprise Edition) with lots of diagrams & code to quickly grasp the concepts for the beginner to advanced Java developers. It pays to brush-up before attending Java job interviews. Q1. Can you describe the high level architecture of the application that you...

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Q08 – Q15 Hibernate interview Q&As

Extends 15+ Hibernate interview questions & answers – Q1 – Q7. Hibernate interview questions & answers with diagrams & code snippets to not only prepare for the job interviews, but also to easily grasp the concepts Q9. Explain hibernate object states? Explain hibernate objects life cycle? … Read more ›...

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Q1 – Q10 Java OOPs interview Q&As

If you don’t get Java OOPs interview questions & answers right in the job interviews you can say OOPS !!!! to your Java interview success. Q1. Is Java a 100% Object Oriented (OO) language? if yes why? and if no, why not? A1. … Read more ›...

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Q29-Q53: Top 50+ FAQ JEE Interview Q&As

This extends Q1 – Q28 EE Java interview Questions and Answers Q29. What are the different ways can you wire up your dependencies using Spring? A29. 3 different ways. You can combine all 3 ways. Using an XML based application context file as demonstrated here in STEP 4 . …...

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QoS & SLAs interview Q&As on Availability, Serviceability, Fault tolerance & Disaster Recoverability – Non Functional Requirements

Q1. What are the system qualities that typically form a basis for QoS requirements? A1. Quality of service (QoS) covers Non Functional requirements such as As microservices use disparate datasources like SQL store, NoSQL store, Cache, Object store like AWS S3, … Read more ›...

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Regular Expressions interview Q&As for Java developers

Q1 What’s the difference between a wildcard and a regular expression? A1 A wildcard is a generic term referring to something that can be substituted for all possibilities. In computer terms, usually a simple “wildcard” is just a * that can match one or more characters, … Read more ›...

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Spring Boot Exception handling Interview Q&As

This extends Spring Boot annotations interview Q&As and Java exception handling interview questions and answers. Q01. What is exception handling & why is it important? A01. In Java, Exceptions are objects that are thrown when an error or unexpected situation occurs during the execution of a program. … Read more...

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Spring Cloud Microservices interview Q&As

This extends 15 Spring Boot interview questions & answers. Spring Boot & Spring Cloud are used for building Microservices architecture. Q1. What is Spring Cloud? A1. Spring Boot is widely used to develop MicroServices. As many organisations deploy these services on the cloud like AWS, … Read more ›...

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Top 10 causes of performance issues in Java

Cause #1: The JVM spends more time performing garbage collection due to improper Garbage Collection (GC) configuration. E.g. Young generation being too small. Heap size is too small (use -Xmx). The application footprint is larger than the allocated heap size. … Read more ›...

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Why favour composition over inheritance?

This is not only one of the most popular Java OOP Interview Questions & Answers asked 90% of the time in job interviews, but also a key OOP concept you must know well. The correct answer depends on the problem you are trying to solve, and the answer you give...

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YAML with Spring & Java interview Q&As

Q1. What is YAML?
A1. YAML Ain’t Markup Language. It is a human friendly data serialization standard for all programming languages. A YAML file has an extension of “.yml“.

Q2. What are the 3 rules of YAML?

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300+ Java Interview FAQs

Java Interview FAQs 300+
Java FAQs - 01: Prepared?
(2)
Java FAQs - 02: Ice Breaker
(5)
Java FAQs - 03: Core Java
(15)
Java FAQs - 03 Java versions 9 to 20
(7)
Java FAQs - 04: OOP & FP
(10)
Java FAQs - 05: JEE
(12)
Java FAQs - 06: Spring
(10)
Java FAQs - 07: Hibernate
(4)
Java FAQs - 08: Web Services
(6)
Java FAQs - 09: Microservices
(12)
Java FAQs - 10: Messaging
(4)
Java FAQs - 11: Architecture
(5)
Java FAQs - 12: RDBMS
(2)
Java FAQs - 13: SQL
(6)
Java FAQs - 14: Code Quality
(4)
Java FAQs - 15: Key Areas
(14)
Java FAQs - 16: UML
(1)
Java FAQs - 17: GIT
(4)
Java FAQs - 18: Linux
(3)
Java FAQs - 19: DevOps (CI/CD)
(9)
Java FAQs - 20: AWS (Cloud)
(5)
Java FAQs - 21: Maven
(1)
Java FAQs - 22: Regex
(2)
Java FAQs - 23: JSON & XML
(3)
Java FAQs - 24: JMeter
(2)
Spring & Hibernate FAQs
Framework - Hibernate Q&As
(13)
Framework - Spring Core
(6)
Framework - Spring MVC
(7)
Framework - Spring Cloud
(1)
Framework - Spring boot
(4)
Framework - Spring IO
(1)
Framework - Spring Config
(5)
Java Architect FAQs
Architecture - Patterns
(10)
Architecture - How to
(17)
Architecture - AWS
(10)
Architecture - Azure
(6)
Architecture - Distributed
(8)
Architecture - Microservices
(11)
Architecture - Networking
(6)
Architecture - QoS
(1)
Architecture - ERD
(1)
Architecture - ETL
(3)
Architecture - Low Latency
(6)
Architecture - UML
(1)
Java code quality Q&As
Code Quality - Automation
(1)
Code Quality - Code Coverage
(2)
Code Quality - FAQs
(7)
Code Quality - Profiling
(3)
Code Quality - Performance
(2)
Code Quality - Unit Testing
Code Quality - BDD
(4)
Code Quality - JMockit
(15)
Code Quality - Mockito
(4)
Code Quality - Unit Testing FAQs
(3)
Code Quality – Testing DAOs
(4)
Code Quality – JUnit & Mockito
(6)
Code Quality – JUnit Web
(2)
Code Quality - Spring TXN
(2)
Java coding Q&As
Coding - Can you write code?
(22)
Coding - Complete the code
(13)
Coding - Converting from A to B
(6)
Coding - Designing your classes
(9)
Coding - Data Structures
Coding - Arrays
(2)
Coding - Big O notation
(2)
Coding - Graph Structure
(2)
Coding - LinkedList Structure
(2)
Coding - Map Structure
(1)
Coding - Pointer Algorithms
(3)
Coding - Queue Structure
(1)
Coding - Searching Algo
(1)
Coding - Sorting Algo
(4)
Coding - Stack Structure
(1)
Coding - Tree structure
(14)
Coding - Data Which & Why
(2)
Coding - Passing the unit tests
(5)
Coding - What is wrong?
(10)
Coding - Home Assignments
(8)
Coding - Written Test Core Java
(4)
Coding - Written Test JEE
(1)

Tutorials on Java & Big Data

Tutorials - Golang
5
Tutorials - Big Data
TUT - ⏯ Starting Big Data
2
TUT - Starting Spark & Scala
10
TUT - Starting with Python
2
TUT - Pig
3
TUT - Apache Storm
3
TUT - Spark Scala on Zeppelin
14
TUT - Cloudera
4
TUT - Cloudera on Docker
21
TUT - File Formats
8
TUT - Spark on Docker
8
TUT - Flume
2
TUT - Hadoop (HDFS)
5
TUT - HBase (NoSQL)
5
TUT - Hive (SQL)
1
TUT - Hadoop & Spark
16
TUT - MapReduce
3
TUT - Spark and Scala
2
TUT - Spark & Java
14
TUT - Apache Kafka
8
TUT - Hadoop
1
TUT - PySpark on Databricks
28
TUT - Zookeeper
2
Tutorials - Enterprise Java
TUT - Starting with Java
22
TUT - ⏯ Java Video Tutorials
TUT - ⏯ Starting with Java
12
TUT - ⏯ Spring Core
1
TUT - ⏯ Spring MVC
5
TUT - ⏯ JDBC, Hibernate
6
TUT - ⏯ Spring Boot
2
TUT - ⏯ Angular with Spring
TUT - ⏯ Q&As
2
TUT - Diagnosis
2
TUT - Akka
TUT - Akka Scala
3
TUT - Akka Java
6
TUT - AWS EC2
4
TUT - CI/CD Jenkins
3
TUT - Core Java
TUT - Debugging
4
TUT - Java 8
4
TUT - JSON and Java
1
TUT - Java Beginner
1
TUT - XML and Java
8
TUT - CSV and Java
2
TUT - Docker
9
TUT - Java gRPC
3
TUT - JEE
TUT - Web & Web Services
7
TUT - REST Client
1
TUT - JSF
1
TUT - JDBC
5
TUT - FIX and Java
3
TUT - JAXB
8
TUT - JMX
1
TUT - JPA
1
TUT - MySQL
1
TUT - Scala
TUT - Scala Actors
1
TUT - Spring & Hibernate
TUT - Hibernate
2
TUT - Spring Basics
10
TUT - Spring batch
3
TUT - Hibernate & Spring
5
TUT - Spring Boot
6
TUT - Spring IO
1
TUT - Spring ORM
2
TUT - Spring other
2
TUT - Spring OXM
2
TUT - Spring Cloud
9
TUT - Tools
TUT - JMeter
3
TUT - Maven
4
TUT - Maven Assembly
2
TUT - Maven Profiles
1
TUT - Productivity Tools
9
TUT - Apache Kafka
3
TUT - Redis Tutorial
2
TUT - Kubernetes & Docker
5
TUT - Other
TUT - SQL
3
TUT - Drools
5
TUT - Apache POI
3
TUT - DOS
2
TUT - Dozer
2
TUT - ESB
1
TUT - Groovy
3
TUT - Jasper Reports
4
TUT - Logging and auditing
6
TUT - Metrics
2
TUT - Orika Mapping
2
TUT - Pentaho Kettle ETL
4
TUT - Linux
7
TUT - Webspeher MQ
3
TUT - YAML
1