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Looking something up in an array? O(n). Looking it up in a hash table? O(1). Hash tables use a hash function to transform ...

Keywords / Topics Covered hashing explained why hashing cannot be reversed hashing vs encryption one way hash function ...

SQL Superstar in 50 Days by Sumit Mittal To know about my Ultimate Data Engineering Program - https://www.trendytech.in ...

What turns a file into a fixed-size “fingerprint”? In this video we unpack cryptographic hash functions — what they are, why ...

The Rabin–Karp algorithm is one of the most elegant approaches to string matching, built on the power of hashing. Explore stydy ...

Arrays and HashMaps are some of the most important topics in coding interviews — and once you understand them, many ...

In this video, I solve LeetCode Problem 1 – Two Sum with a clear and beginner-friendly explanation. You'll learn: • Problem ...

Most people memorize the Prefix Sum + Hash Map solution for Subarray Sum Equals K — but don't truly understand why it works.

Struggling with thread-safe Java Sets? Choosing the wrong Set implementation can lead to performance bottlenecks, race ...

In this video, I explained the Two Sum problem completely from scratch, using it as a transition from hashing-based approaches to ...

Learn how to solve the famous "Insert Delete GetRandom O(1)" coding interview problem with a constant time complexity solution!

In this video, we will learn load factor and performance analysis in hashing, which is an important topic of Unit 5 – Data Structures ...

TwoSumProblem #DSA #CodingInterview Leetcode #2 | Two Sum Problem Explained in Java | Brute Force vs O(n) Hash Map ...

What exactly is Bitcoin Mining and why does it consume energy? It's not just about solving math problems—it's about solving the ...

In this video, we solve the classic LeetCode problem: Two Sum using C++. Given an array of integers and a target value, we need ...

Learn the fundamentals of the Trie Data Structure (Prefix Tree) in this beginner-friendly guide! We break down how Tries work, ...

In this video, we solve the "Contains Duplicate" problem from LeetCode as part of the ThinkDSA Series, where the focus is not just ...

Ever wondered how websites can store millions of passwords without actually knowing any of them? And why even after a ...

Did we get the number zero wrong? A Google Gemini AI Interview Unpacks the Secret Architecture of Web4! Get ready to have ...

Group Anagrams – LeetCode Explained | Easy & Optimal Approach In this video, we solve the Group Anagrams problem from ...

In this video, we will learn applications of hashing in data structures, which is an important topic of Unit 5 – Hashing as per the ...

Unlock the complete guide to DBMS File Organization, Indexing, B+ Trees & Hashing — explained in easy English with real ...

In this video, we explain how hackers steal passwords and how passwords are converted into hashes for storage. This content is ...

What if I told you that some of the fastest systems on the internet rely on being wrong? #systemdesign #datastructures ...

In this video, I explained the 3 Sum problem using the two pointers pattern, building directly on the Two Sum concept covered ...