Most Asked Linked List Interview Question | Cycle Detection | LeetCode 141 & 142

Описание: In this video, we solve two of the most frequently asked Linked List interview questions using the Fast & Slow Pointer technique (Floyd’s Cycle Detection Algorithm).

We cover both detection and cycle entry point in a clean, step-by-step manner using real examples and dry runs.

🔹 Problems Covered:

✅ LeetCode 141 – Linked List Cycle
→ Detect whether a linked list contains a cycle

✅ LeetCode 142 – Linked List Cycle II
→ Find the node where the cycle begins

🧠 What You’ll Learn:

What is a cycle in a linked list

Why brute force solutions fail in interviews

How Fast & Slow pointers work

Step-by-step dry run with visuals

Why pointers meet (mathematical intuition)

How to find the exact cycle starting node

Time & space complexity analysis

How to explain this confidently in interviews

leetcode 141
leetcode 142
linked list cycle
linked list cycle detection
linked list cycle ii
floyd cycle detection algorithm
fast and slow pointer
tortoise and hare algorithm
cycle detection in linked list
linked list interview questions
faang dsa
product based company interview
dsa in java
java linked list
leetcode linked list
leetcode interview questions
most asked dsa questions
data structures and algorithms
dsa for placements
coding interview preparation
cycle detection algorithm