3 Secrets About C# Dictionaries You're Not Aware скачать в хорошем качестве

3 Secrets About C# Dictionaries You're Not Aware

C# Dictionary Internals Explained – In this video, we break down how C# Dictionary works using hashing, buckets, collision handling and real interview scenarios. If you're preparing for product-based company interviews, this deep dive gives you the clarity interviewers actually expect — beyond just solving the “character occurrence” question. Most developers memorize syntax. Few truly understand how Dictionary works internally. In this session, we cover: • List vs Dictionary lookup complexity • Why List lookup is O(n) • Why Dictionary average lookup is O(1) • How hash codes are generated • Internal bucket structure explained • Collision handling mechanism • When to use Dictionary in real-world .NET applications • When NOT to use Dictionary • Dictionary vs HashSet difference This video is designed especially for 3–8 years experienced .NET developers preparing for C# and .NET Core interviews. If you want to confidently answer follow-up questions about hashing, buckets, and collision — this video aligns your preparation with what actually gets evaluated. --- 📌 Chapters 0:00 Why Dictionary Is So Misunderstood 1:15 The Interview Trap: Character Occurrence Question 2:40 List vs Dictionary – Employee Example Setup 5:10 Why List Lookup Is O(n) 7:05 Dictionary Implementation – O(1) Lookup 9:30 Duplicate Key Runtime Error Explained 11:00 What Is Hashing? (Core Concept) 13:20 What Are Buckets in a Dictionary? 16:10 How Lookup Works Internally 18:40 What is a collision? 21:15 How Dictionary Handles Collision 23:40 When You Should Use a Dictionary 26:00 When NOT to Use a Dictionary 27:30 Real-World .NET Examples (JSON, HttpContext, AppSettings) 29:00 Dictionary vs HashSet 30:30 Interview Strategy & Final Advice --- #csharp #dotnet #dotnetcore #datastructures #codinginterview #productbasedcompany