Interview Fundamentals

Core Java concepts, practical Q&A, and coding discussion topics asked in technical interviews.

• SQL vs NoSQL: Complete Guide to Differences, Use Cases, and Examples

  4 Apr, 2026

  By Pratik Bhuite | 12 min read

  Series: Database Fundamentals

  Learn the key differences between SQL and NoSQL databases, their use cases, advantages, and when to choose each for your projects with practical examples.

  • Database
  • SQL
  • NoSQL

• Relational Databases Explained: Tables, Rows, and Keys

  3 Apr, 2026

  By Pratik Bhuite | 18 min read

  Series: Database Fundamentals

  Learn relational databases: tables, rows, columns, and keys - with practical SQL examples and clear explanations for beginners.

  • Database
  • SQL
  • Relational Database

• Java String Quiz: 16 MCQ Questions with Answers

  Updated

  Updated: 26 Mar, 2026

  By Pratik Bhuite | 7 min read

  Series: Java Interview & Problem Solving Series

  Test your Java String knowledge with 16 MCQ questions and answers covering String, StringBuilder, StringBuffer, and SCP basics.

  • Java
  • SCP
  • String

• Reverse Integer in Java: Simple Explanation and Code

  Updated

  Updated: 26 Mar, 2026

  By Pratik Bhuite | 3 min read

  Series: Java Interview & Problem Solving Series

  Learn how to reverse an integer in Java without using built-in APIs, with a simple code example and step-by-step explanation.

  • Code Interview Questions
  • Java Code Problems
  • Reverse An Integer In Java

• Is Java Pass by Value or Pass by Reference?

  Updated

  Updated: 26 Mar, 2026

  By Pratik Bhuite | 15 min read

  Series: Java Interview & Problem Solving Series

  Understand why Java is pass by value with clear examples for primitives, objects, and collections, plus the common interview trap.

  • Core Java
  • Java
  • Java Concepts

• Java Regex Quiz: 20 MCQ Questions with Answers

  Updated

  Updated: 26 Mar, 2026

  By Pratik Bhuite | 9 min read

  Series: Java Interview & Problem Solving Series

  Test your Java regex knowledge with 20 MCQ questions and answers covering Pattern, Matcher, syntax basics, and common matching rules.

  • Java Regex
  • Java Regular Expressions
  • Regex Questions

• Java Interfaces Explained: How to Code to an Interface

  Updated

  Updated: 26 Mar, 2026

  By Pratik Bhuite | 9 min read

  Series: Java Interview & Problem Solving Series

  Learn Java interfaces with clear examples and understand what 'code to an interface' means for flexibility, testing, and cleaner design.

  • code to interface
  • Java
  • object oriented concepts

• Regular Expressions in Java: Complete Guide with Examples

  Updated

  Updated: 26 Mar, 2026

  By Pratik Bhuite | 28 min read

  Series: Java Interview & Problem Solving Series

  Learn regular expressions in Java with clear syntax, Pattern and Matcher examples, common metacharacters, and practical regex use cases.

  • Java Regex
  • Java Regular Expressions
  • Java Tutorials

• Tomcat vs JBoss: Differences, Use Cases, and Which to Choose

  Updated

  Updated: 26 Mar, 2026

  By Pratik Bhuite | 12 min read

  Series: Java Interview & Problem Solving Series

  Compare Tomcat vs JBoss across Java EE support, performance, deployment complexity, and when to choose each server in real projects.

  • App Server
  • Java
  • JBoss