Add General Back-End Topics you should understand before choose your Stack

backend/general/generalTopics.md

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+# General Topics  
+
+#### Before choosing a specific stack, master these fundamentals:  
+
+* **Programming Concepts**  
+  *Converting Programming Code to Binary Code Process ,Compilers,Interpreters ,Variables ,Loops, Functions ,OOP, error handling,Etc..*  
+
+* **Basic Data Structures**  
+  *Array, Linked List, Stack, Queue, Hash Map/Dictionary, Tree, Graph*  
+
+* **Basic Algorithms**  
+  *Sorting, searching, hashing, mapping, graph algorithms (BFS/DFS)*  
+
+* **Problem Solving**  
+  *Practice on LeetCode, HackerRank*  
+
+* **Database Concepts**  
+  *Tables, Keys, Relationships, Normalization, Indexing, Transactions*  
+
+* **Back-End Fundamentals**  
+  *HTTP Request/Response lifecycle, Web/Application Servers, Client-Server Model, DNS, Latency, Hosting, Proxy, Caching, Authentication/Authorization,First Byte*  
+
+* **MVC (Model-View-Controller)**  
+  *Used by most backend frameworks to organize projects*  
+
+* **APIs (REST/GraphQL)**  
+  *Critical for frontend-backend integration*  
+
+---
+
+#### **Choose a Backend Stack** (Examples):  
+* C# & ASP.NET Core  
+* Java & Spring Boot  
+* JavaScript & Node.js  
+* PHP & Laravel  
+* Python & Django  
+* Ruby on Rails  
+* others
+
+#### **Notes**:  
+1. **Selection Criteria**:  
+   - Pick a stack you’re comfortable with and that aligns with job markets in your target region or a specific company.  
+2. **Learn the Framework First**:  
+   - Understand its workflow, features, and request lifecycle *before* coding to be aware what happen behind the seen.  
+