Day 9/90 |⚡ 🚀 3 Popular Interview Questions Fast & Slow Pointers Pattern | | DSA Pattern #2

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Unlock the power of the Fast and Slow Pointers Pattern — one of the smartest and most frequently tested techniques in coding interviews for FAANG, product-based companies, and top startups.

In this video, we break down the 3 most popular and high-impact interview problems that brilliantly use the Hare & Tortoise algorithm. With crystal-clear intuition, diagrams, and code walkthroughs, you'll learn how to use pointer speeds to detect structures, split circular lists, and identify duplicates — all in O(n) time and O(1) space.

🚀 What You’ll Learn

We will cover these 3 MUST-DO Fast & Slow Pointer problems:

1. Split a Circular Linked List Into Two Halves

Use fast and slow pointers to find the midpoint of a circular linked list and divide it into two equal (or nearly equal) halves — a common question in linked list rounds.

2. Palindrome Linked List

Check whether a linked list is a palindrome by finding the middle, reversing the second half, and comparing both halves efficiently.

3. Find the Duplicate Number

Understand how Floyd’s Cycle Detection algorithm applies to arrays by treating index → value transitions as pointers. Fast and slow pointers reveal the duplicate without modifying the array.

🔥 Why This Video Is Important

These 3 problems cover all major applications of the Fast & Slow Pointer pattern:

Midpoint discovery

Cycle detection in arrays

Structural analysis of linked lists

Efficient O(1) space techniques

Real FAANG-style insights

Mastering them will greatly boost your chances in interview rounds at:

You will understand:

How Hare & Tortoise logic exposes hidden patterns

How cycle detection works on arrays

How to split circular linked lists correctly

How to verify palindromes in linked lists without extra space

🎯 Who Should Watch?

Students preparing for coding interviews

Engineers revising core DSA

Learners following the Babua DSA Patterns Course 2025

Anyone who wants deep intuition on linked list & array pointer tricks

Hashtags:
#FastAndSlowPointers
#FloydCycleDetection
#HareAndTortoise
#SplitCircularLinkedList
#PalindromeLinkedList
#FindDuplicateNumber
#DSAPatterns
#BabuaDSAPatterns
#CodingInterviewPrep
#FAANGInterviews
#LinkedListProblems
#LeetCodeDSA
#TwoPointers
#PointerAlgorithms
#CTOBhaiya
#NextGenCTO
#DSAin90Days
#CrackCodingInterviews
#Striver
#TakeUForward
#ApnaCollege
#LoveBabbar
#NamasteDev
#CompetitiveProgramming
#DataStructuresAndAlgorithms

Your Queries
Fast and Slow Pointer
Hare and Tortoise algorithm
Happy Number explained
Middle of linked list
Linked list cycle detection
Linked list cycle II
Detect cycle in linked list
Cycle length linked list
Floyd cycle detection
Fast slow pointer problems
DSA patterns
Babua DSA Patterns
CTO Bhaiya
Two pointers
LeetCode fast slow pointer
Striver
Take U Forward
Apna College
Love Babbar
Namaste Dev
Coding interview prep
DSA playlist
FAANG interview preparation

CHAPTERS
00:00 Introduction
01:01 Split a Linked List into Two Halves - Theory
12:22 Split a Linked List into Two Halves - Code
19:09 287. Find the duplicate Number - Approach 1 - Theory
23:00 287. Find the duplicate Number - Approach 1 - Code
24:57 287. Find the duplicate Number - Approach 2 - Theory
32:00 287. Find the duplicate Number - Approach 2 - Code
41:17 234. Palindrome Linked List - Approach 1 - Theory
43:48 234. Palindrome Linked List - Approach 1 - Code
45:40 234. Palindrome Linked List - Approach 2 - Theory
53:26 234. Palindrome Linked List - Approach 2 - Code
58:10 Conclusion

#DSAPatterns2025 #DSAin90Days #CodingInterviewPreparation #FAANGPreparation #LeetCodePatterns #CTOBhaiya #DSAMastery #DataStructuresAndAlgorithms #CodingInterviewBootcamp #LearnDSA #CodingChallenge #ProblemSolvingPatterns #ZeroToHeroDSA #ThinkInPatterns #90DayDSAChallenge #DSAPlaybook #CrackFAANG #JavaDSA #PythonDSA #CodingJourney #FAANGInterviewPrep #IITianDSACourse #DSACourse2025 #LearnCodeCrack #DSAPlaylist #CrackCodingInterviews #ProgrammingLogic #DSACompleteCourse #DSARevision #DSAStudyPlan

Your Queries:
Fast and slow pointers
Hare and Tortoise algorithm
Floyd cycle detection
Split circular linked list
Palindrome linked list
Find duplicate number
Cycle detection array
Linked list midpoint
DSA patterns
Babua DSA Patterns
CTO Bhaiya
LeetCode problems
Coding interview preparation
FAANG interview prep
Striver
Take U Forward
Apna College
Love Babbar
Namaste Dev
DSA playlist
Linked list cycle logic
Two pointer technique

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