jstack Utility Deep Dive: JVM Thread Dumps, Deadlocks, and Mixed Stacks
This guide explains how to use jstack to diagnose JVM hangs and deadlocks, including forced dumps, core-file analysis, and mixed Java/native stack traces. It also clarifies where jcmd fits in modern JDK 8+ troubleshooting guidance.
Deploying Java EE on Amazon EC2 with EC2Deploy: Workflow, Script, and Modern Lessons
This revised guide breaks down the original EC2Deploy approach for provisioning EC2 instances, deploying Java EE apps, and running JMeter tests. It also maps the same deployment pattern to modern DevOps practices.
Jacksum for DevOps: Practical Checksum Verification and Usage Patterns
Learn what Jacksum is, where it fits in DevOps workflows, and how to use it for file integrity checks across downloads, backups, and directory comparisons. Includes a verification workflow diagram, command patterns, and tool comparisons.
Apache Ant Properties: Access Java System Properties, Environment Variables, and Runtime Inputs
Apache Ant lets you reference properties with ${name}, including Java system properties, imported environment variables, and command-line values. This guide shows practical syntax, examples, precedence flow, and common pitfalls for reliable builds.
Java Installation Guide in Linux & Windows
DOWNLOAD OPEN JDK & JRE JAVA PACKAGE FROM – https://jdk.java.net/archive/ Download and Install JDK/JRE 7 in Centos & RHEL Download and Install JDK/JRE 8 in Centos &…
Top 10 Integrated Development Environments (IDEs) Tools in 2026: Features, Pros, Cons & Comparison
Introduction An Integrated Development Environment (IDE) is a software application that provides comprehensive tools and features for software development. These environments are designed to streamline the coding…
Top Jenkins interview questions and answers
1. What is Jenkins? Jenkins is an open-source automation server that helps automate various aspects of software development, such as building, testing, and deploying code. It allows…
Complete guide of Java certification courses, tutorials & training
What is Java Sun Microsystems initially introduced Java, a programming language and computing platform, in 1995. Through the provision of the dependable foundation upon which several services…
What is Jacoco and How it works? An Overview and Its Use Cases
What is Jacoco? JaCoCo is an open-source toolkit for measuring code coverage in a code base and reporting it via visual reports. It is quite popular among…
Complete Python Programming with Django Certification Guide & tutorials
What is Python Programming with Django? Python is a programming language and Django is a web framework built using Python as well as it is designed to…
What is Jmeter and How it works? An Overview and Its Use Cases
History & Origin of Jmeter JMeter was developed by Stefano Mazzucci of the Apache Software Foundation. The first version 1.0 was released in 1998. Revised version 5.1,…
Top 50 TeamCity interview questions and answers
1) Is TeamCity a CI or CD? TeamCity is a general-purpose CI/CD solution that allows the most flexibility for all sorts of workflows and development practices. The…
What is Rust and How it works? An Overview and Its Use Cases
History & Origin of Rust Rust has been voted the “most loved programming language” in the Stack Overflow Developer Survey every year since 2016 and was used…
Top 50 Cobertura interview questions and answers
1) Where Does The Name “cobertura” Come From? “Cobertura” is the Spanish and Portuguese word for “coverage.” We were trying to avoid acronyms and coffee references. It’s…
Top 50 Ncover interview questions and answers
1) What is code coverage analysis? A code coverage analyzer monitors your code at runtime and records information about which lines of code were executed. NCover shows…
Top 50 Jacoco interview questions and answers
1) Is JaCoCo only for Java? JaCoCo supports Java class files from version 1.0 to 16. However the minimum JRE version required by the JaCoCo runtime (e.g….
What is Scala and How it works? An Overview and Its Use Cases?
What is Scala? Scala stands for Scalable Language. It is a multi-paradigm programming language. Scala language includes features of functional programming and object-oriented programming. Scala is designed…
Top 50 Jmeter interview questions and answers
1) Explain what is JMeter? JMeter is a Java tool, which is used for performance Load Testing. 2) Explain how JMeter works? JMeter acts like a group…
Top 50 Junit interview questions and answers
1) What is Testing? Testing is the process of checking the functionality of the application whether it fulfills the requirement or not. 2) What is unit testing?…
Top 50 selenium interview questions and answers
1) What is Selenium and what is composed of? Selenium is a suite of tools for automated web testing. It is composed of Selenium IDE (Integrated Development…
Top 50 Zabbix interview questions and answers
1) What can be monitored using Zabbix? Zabbix provides monitoring metrics, such as network utilization, CPU load and disk space consumption. The software monitors operations on Linux,…
Top 50 Numpy interview questions and answers
1) What is Numpy? Ans: NumPy is a general-purpose array-processing package. It provides a high-performance multidimensional array object, and tools for working with these arrays. It is…
Top 50 OpenNN interview questions and answers
1) How does an open-source software community form? Open source software communities form when people agree to work together to build and improve software. … Because open…
Top 50 OpenCV interview questions and answers
1) Explain what is OpenCV? OpenCV stands for Open Source Computer Vision Library is an open-source library using which is used to develop real-time computer vision applications…
Top 50 Apache spark interview questions and answers
Q1. What is RDD? Ans. RDD (Resilient Distribution Datasets) is a fault-tolerant collection of operational elements that run parallel. The partitioned data in RDD is immutable and…
Top 50 Apache HTTPD Interview questions and answers
1) What do you mean by Apache Web Server? Apache web server is the HTTP web server that is open source, and it is used for hosting…
Top 50 Java Interview Questions & Answers
These questions are very important as its frequently asked in interviews. so if you are willing to know then be in this blog as I am going…