Interview Prep - Senior .NET Azure Lead/Architect | 100+ Topics

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C# Fundamentals

CLR (Common Language Runtime) Value vs Reference Types Boxing & Unboxing var, dynamic, object Access Modifiers Properties Delegates, Events & Lambda Generics Extension Methods Exception Handling Constructors Nullable Types & Null Handling String vs StringBuilder Attributes & Reflection Records (C# 9.0+) Tuples & Deconstruction Collections & LINQ LINQ Fundamentals Entity Framework Core Advanced C# Features Design Patterns Type System & Casting Pattern Matching (C# 7-12) Init-only Setters & Required Members File-scoped Namespaces (C# 10) Primary Constructors (C# 12) IEnumerable vs IQueryable Iterators & yield Equality & GetHashCode IComparable & IComparer C# Interview Questions

Object-Oriented Programming

Encapsulation Inheritance Polymorphism Abstraction SOLID Principles

Memory Management

Stack vs Heap Garbage Collection & IDisposable Span<T> & Memory<T> Dispose Pattern & using

Threading & Async Programming

Threading & Multithreading Async & Await Async Streams (IAsyncEnumerable) Channels (Producer/Consumer) Async Best Practices Concurrency Primitives (lock, Semaphore) Concurrent Collections CancellationToken

.NET Core

ASP.NET Core Fundamentals Dependency Injection Middleware Pipeline Configuration & Options Pattern Hosted Services & Background Jobs Health Checks gRPC Minimal APIs (.NET 6+) Web API Development REST API & Microservices Authentication & Authorization Exception Handling Levels Performance Optimization Unit Testing (xUnit, NUnit, MS Test) Logging & Monitoring SignalR & Real-Time Communication Enterprise Architecture Patterns Clean Architecture Output & Response Caching Rate Limiting API Versioning Background Jobs (Hangfire/Quartz) FluentValidation & AutoMapper OpenTelemetry & Tracing Docker & Kubernetes .NET 8 & 9 Features .NET Aspire Action & Endpoint Filters Model Binding & Validation HttpClientFactory & Resilience OpenAPI & Swagger CORS Integration Testing (WebApplicationFactory)

Database & SQL

SQL Fundamentals Joins Indexes & Performance Stored Procedures & Functions Transactions & Locks Common Table Expressions (CTE) Keys & Constraints Window Functions Views Triggers Normalization SQL Interview Questions Query Optimization Isolation Levels & Deadlocks EF Core Performance SQL vs NoSQL

Azure Cloud

Azure Functions & App Service CI/CD & DevOps Azure Storage & Data Services Messaging (Service Bus, Event Grid/Hubs) Key Vault & Managed Identity Entra ID (Azure AD) Cosmos DB Container Apps & AKS API Management Monitor & App Insights Azure Cache for Redis Well-Architected Framework Event Hubs & Event Grid Durable Functions Infrastructure as Code (Bicep/Terraform)

System Design & Architecture

Microservices vs Monolith CQRS & Event Sourcing Saga Pattern Caching Strategies Resilience Patterns (Polly) Scalability & Load Balancing API Gateway & BFF Domain-Driven Design (DDD) Event-Driven Architecture Idempotency CAP & Consistency Models Observability

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