Deep dive into the .NET interview Questions

🚀 Deep dive into the .NET interview Questions 🚀 Are you preparing for a Senior #.NET Developer role at a Top MNC, Fintech, or Product-based company? In this comprehensive deep dive, we break down the most critical .NET #Microservices, EF Core, and System Design questions that interviewers at Microsoft partners and tech giants are asking right now. Understanding the "How" is easy—mastering the "Why" is what gets you hired. We cover everything from the Saga Pattern and CQRS to EF Core performance tuning and Distributed Systems. 📌 What You Will Learn: Microservices Mastery: API Gateways, Service Discovery, and Circuit Breakers. Database Excellence: EF Core optimization, N+1 problem, and Bulk Operations. High-Performance Coding: Async/Await, Thread Pool management, and Garbage Collection. System Design: CAP Theorem, Eventual Consistency, and Event Sourcing. DevOps & Scaling: Docker, Kubernetes (AKS), and Horizontal vs. Vertical scaling. Shutterstock ⏲️ Timestamps (Chapters): 00:00 - Intro: Advanced .NET Interviews 2026 00:31 - Microservices vs. Monolith: The Real Difference 01:01 - Why Monoliths Fail at Scale 01:20 - Real World Example: Netflix Microservices 01:44 - When NOT to use Microservices (Modular Monoliths) 02:08 - Key Components: API Gateway, RabbitMQ, Docker 02:34 - Deep Dive: The Role of API Gateways 02:58 - Handling Transactions: The Saga Pattern 03:24 - CQRS: Command Query Responsibility Segregation 03:47 - API Reliability: Idempotency Keys 04:07 - Sync vs. Async Communication (Kafka & HTTP) 04:34 - Resiliency: The Circuit Breaker Pattern (Polly) 04:53 - Event-Driven Architecture Explained 05:12 - Entity Framework Core (EF Core) Essentials 05:31 - Internal Mechanics: Change Tracking 05:50 - Performance Hack: AsNoTracking() 06:09 - Fixing the N+1 Query Problem 06:27 - Loading Strategies: Eager, Lazy, & Explicit 06:46 - Caching SQL: Compiled Queries 07:04 - Transactions & Consistency in EF Core 07:22 - Database Indexing for High-Traffic APIs 07:40 - Bulk Operations (Dapper vs. EFCore.BulkExtensions) 07:57 - EF Core Best Practices Summary 08:16 - Async/Await & Thread Starvation 08:34 - How the .NET Thread Pool Works 08:50 - Garbage Collection (GC) & Memory Management 09:08 - Identifying Memory Leaks in .NET 09:25 - Response Caching vs. Distributed Caching (Redis) 10:02 - Output Caching for High-Frequency Endpoints 10:19 - Top 6 Performance Optimization Tips 10:36 - Load Balancing Strategies (Round Robin vs. IP Hash) 10:53 - Vertical vs. Horizontal Scaling 11:11 - Fundamentals of Distributed Systems 11:28 - The CAP Theorem: Consistency vs. Availability 11:46 - Eventual Consistency & DynamoDB 12:03 - Message Queues: RabbitMQ, Kafka, Azure Service Bus 12:20 - Event Sourcing & Audit Trails 12:37 - API Rate Limiting (HTTP 429) 12:54 - Observability: Distributed Tracing & OpenTelemetry 13:10 - Service Mesh: Istio & Linkerd 13:27 - Containerization with Docker 13:42 - Orchestration with Kubernetes (K8s) 13:58 - Dependency Injection & Service Lifetimes 14:15 - Transient vs. Scoped vs. Singleton 14:31 - Middleware Pipeline Explained 14:47 - Authentication vs. Authorization 15:04 - Stateless Security: JWT (JSON Web Tokens) 15:21 - Clean Architecture: Domain-Driven Design 15:38 - Is the Repository Pattern Dead? 15:56 - EF Core vs. Dapper: Which to Choose? 16:11 - IEnumerable vs. IQueryable vs. List 16:28 - Common Mistakes Senior Devs Make 16:45 - Conclusion & Next Steps 🛠️ Resources & Tools Mentioned: Frameworks: .NET 8/9/10, EF Core, ASP.NET Core Message Brokers: RabbitMQ, Apache Kafka, Azure Service Bus Caching: Redis, Memcached DevOps: Docker, Kubernetes, Helm Monitoring: OpenTelemetry, Jaeger, ELK Stack 💡 Key Interview Keywords (SEO): #Advanced.NET Interview Questions 2026, C# Microservices Tutorial, System Design for .NET Developers, #EntityFramework Core Performance, Senior Web Developer Interview, Distributed Systems .NET, #CQRS and Saga Pattern C#, #ASP.NET Core Middleware, .NET Garbage Collection Explained. 📢 Follow Me on Social Media: 🔗 Facebook ➤ [Easy Learning Channel]( / easylearningchannel ) 🔗 StackOverflow ➤ [Tahir Alvi on StackExchange](https://beta.stackoverflow.com/users/355191/tahir-alvi) Thanks for Watching