Data Structure

The “Mirror” Interview Challenge Imagine you are in a technical interview. The interviewer asks: “How do you check if a Singly Linked List reads the same forwards and backwards?” Your…

In our previous article, we learned how to find the Nth node from the back. But in technical interviews at companies like Amazon, Google, or TCS, the question usually goes…

In our previous chapters, we mastered moving forward through a Linked List. But what happens when a problem asks you to count from the back? Since a Singly Linked List…

In the previous challenge, we learned how to tell if we were stuck in a loop. But in LeetCode 142 (Linked List Cycle II), simply knowing you’re in a circle…

Reversing a Singly Linked List is a classic interview question that often confuses beginners. The logic of moving pointers can feel like a game of musical chairs where someone always…

As you know sorting is a technique by which we can arrange elements either in ascending order or descending order. We have a lot of sorting techniques like Selection, Bubble,…