Coding & Skills
391 articles in this topic
Exception Handling in Java: Checked vs Unchecked, finally Traps and Output Questions
Replace guesswork with precise Java exception rules. Trace two classic finally outputs, order catches correctly, and preserve causes when wrapping failures.
Updated 11 Aug 20266 min readJava
Python Dictionaries Tutorial: Syntax, Methods and Worked Examples
Learn how Python dictionaries store, retrieve and transform key-value data through runnable examples, common traps and one complete marks-processing task.
Updated 11 Aug 20266 min readPython
Sorting and Searching in Python: When to Implement the Classics and When to Use sort() and bisect
Learn when to write sorting and searching algorithms yourself, when Python's built-ins are the better choice, and how to explain the complexity of both.
Updated 10 Aug 20265 min readDSA & Algorithms
Object-Oriented Programming (OOP): Four Pillars and a Worked Dynamic-Binding Example
Build a precise OOP mental model, then follow two Employee objects through a Java program to see overloading, overriding and runtime dispatch in action.
Updated 10 Aug 20266 min readProgramming Languages Survey
Modern C++ Features: C++11 to C++20 Tutorial with Runnable Examples
Learn what changed from C++11 to C++20 by compiling one inventory program, tracing its exact output, and repairing common type, lifetime, and ownership mistakes.
Updated 10 Aug 20266 min read56 viewsC++
Search Algorithms in AI: BFS, DFS, UCS and A* Explained on One Worked Graph
Run five major AI search algorithms on the same weighted graph, compare the paths they return, and check admissibility and consistency with real numbers.
Updated 9 Aug 20266 min read116 viewsML & Data Science
Operators and Precedence in C: Step-by-Step Tutorial with Runnable Examples
Learn how C groups arithmetic, relational, logical, bitwise, conditional, and assignment operators. Trace exact outputs and repair common expression mistakes.
Updated 9 Aug 20266 min read124 viewsC
React Hooks Explained: useState, useEffect, useMemo, and Custom Hooks with Interview Questions
Build the right mental model for React Hooks, then trace a debounced search component from keystroke to filtered result.
Updated 9 Aug 20266 min readWeb Development
Arrays and Strings in Java for Coding Rounds: The Core Patterns That Keep Coming Up
Stop treating every coding-round question as a new puzzle. Learn four reusable array and string patterns, then trace a sliding window on abcabcbb step by step.
Updated 9 Aug 20266 min read80 viewsJava
Python Tutorial: The Complete Learning Path, Ordered for Self-Study
Follow Python in a practical order, from your first program to functions, collections, files, OOP, libraries, and the point where DSA should begin.
Updated 9 Aug 20267 min readPython
How the MERN Stack Fits Together: One Request Traced from a React Click to MongoDB and Back
Follow one Enroll action through React, HTTP, Express, Mongoose, and MongoDB, then trace the JSON response back to the browser and its updated state.
Updated 8 Aug 20266 min readDSA & Algorithms
Java Distributed Technologies: RMI, JDBC, JMS and Two Worked Exam Traces
Build one coherent model of Java distributed APIs, then solve a lost RMI reply and a two-client JDBC stock race using exact traces.
Updated 8 Aug 20266 min readProgramming Languages Survey