Programming Languages
217 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
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 read53 viewsC++
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 read118 viewsC
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 read79 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
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
Unordered Containers in C++: unordered_set and unordered_map with Worked Examples
Learn when to use each unordered container, how hashing and equality cooperate, and how to write portable checks that never depend on iteration order.
Updated 8 Aug 20266 min readC++
Input and Output in C: printf, scanf, fgets and Worked Examples
Learn how C moves text through standard streams, how format strings control conversion, and why checked line input is safer. The worked programs trace every input, return value and output.
Updated 7 Aug 20266 min readC
Java Interview Questions for Freshers: How to Answer OOPs, Strings, Collections and Exceptions
Prepare the Java questions freshers actually face, then learn to explain each output instead of stopping at a memorised definition.
Updated 6 Aug 20265 min readJava
Python String Methods and Formatting: Immutability, Slicing and the Interview Question Patterns
Predict string output by tracking returned values, half-open slices and formatting specifications, then avoid the replace, find, identity and concatenation traps.
Updated 6 Aug 20265 min readPython