Coding Interview Questions

Master How to Count Duplicates in a Linked List (2026)

Jan 24, 2026

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Learn how to count duplicates in a linked list in C++ with this beginner-friendly guide. Step-by-step explanation, easy-to-understand code, and tips for detecting duplicate nodes efficiently. Linked lists are one of the fundamental data structures in programming. While they are simple to understand, performing operations like counting duplicates can be tricky for beginners. In this…

Swap Using XOR: 7 Powerful and Easy Techniques Explained for Beginners

Nov 17, 2025

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by

Raj Kumar

in Bit Manipulation, Embedded, XOR bit manipulation

Swapping two variables is one of the fundamental operations in programming. Most developers learn the traditional method first — using a temporary variable. However, there is a more efficient and mathematically elegant technique: swap using XOR. This method allows you to exchange the values of two variables without using any extra memory, relying entirely on…

Single Number LeetCode Solution C++ | Master XOR Trick | Leetcode Solution (2026)

Jul 14, 2025

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by

Raj Kumar

in Algorithms and Data Structures, Bit Manipulation, Coding Interview Preparation, Competitive Programming, Java Programming, JavaScript Programming, LeetCode Solutions, Problem Solving, Python Programming, Technical Interview Questions

Single Number LeetCode Solution C++ : Learn the most efficient way to solve the Single Number problem on LeetCode using C++ and the XOR bitwise operator. Understand time complexity, code explanation, and why this approach works. Introduction of Single Number LeetCode Solution C++ Looking for an efficient Single Number LeetCode Solution in C++? You’re in…

Tag: Coding Interview Questions

Master How to Count Duplicates in a Linked List (2026)

Swap Using XOR: 7 Powerful and Easy Techniques Explained for Beginners

Single Number LeetCode Solution C++ | Master XOR Trick | Leetcode Solution (2026)