.NET Full Stack Developer: Free Skill Evaluation

variables data types .NET CLR types Important C# concept VALUE VS REFERENCE TYPES parameters optional parameters CLASSES & OBJECTS CLASSES & OBJECTS Fundamentals OOP OOP Fundamentals Critical for dependency injection and architecture INTERFACES ABSTRACT CLASSES ABSTRACT CLASSES Fundamentals ACCESS MODIFIERS ACCESS MODIFIERS Fundamentals DTOs immutable models STRUCTS STRUCTS Fundamentals ENUMS ENUMS Fundamentals GENERICS GENERICS Fundamentals List Dictionary IEnumerable IEnumerable Fundamentals Where Select GroupJoin SelectMany Important for LINQ/EF behavior DEFERRED EXECUTION try catch DELEGATES DELEGATES Fundamentals EVENTS EVENTS Fundamentals LAMBDAS LAMBDAS Fundamentals EXTENSION METHODS EXTENSION METHODS Fundamentals ATTRIBUTES ATTRIBUTES Fundamentals REFLECTION Concepts REFLECTION AWARENESS Fundamentals Use nullable reference-type analysis NULLABILITY Modern C# PATTERN MATCHING Critical production skill ASYNC / AWAIT Understand asynchronous operations TASK Production APIs should support cancellation where appropriate CANCELLATIONTOKEN PARALLELISM PARALLELISM Fundamentals THREAD SAFETY THREAD SAFETY Fundamentals CONCURRENT COLLECTIONS Concepts CONCURRENT COLLECTIONS AWARENESS Fundamentals arrays strings SRP OCP Factory Strategy naming small methods clone branch packages dependencies SOLUTION STRUCTURE SOLUTION STRUCTURE Fundamentals SELECT INSERT SQL FILTERING SQL FILTERING Fundamentals INNER LEFT GROUP BY / HAVING GROUP BY / HAVING Fundamentals SUBQUERIES SUBQUERIES Fundamentals CTE CTE Fundamentals WINDOW FUNCTIONS WINDOW FUNCTIONS Fundamentals clustered concepts non-clustered concepts Understand ACID TRANSACTIONS ISOLATION LEVELS ISOLATION LEVELS Fundamentals Understand diagnosis and prevention DEADLOCKS execution plans indexes Primary Microsoft database SQL SERVER Useful for cross-platform/cloud .NET systems POSTGRESQL Concepts DbContext DbSet CODE FIRST CODE FIRST Fundamentals MIGRATIONS MIGRATIONS Fundamentals one-to-one one-to-many FLUENT API FLUENT API Fundamentals LINQ TO ENTITIES LINQ TO ENTITIES Fundamentals tracking no-tracking EAGER LOADING EAGER LOADING Fundamentals EXPLICIT LOADING EXPLICIT LOADING Fundamentals Discuss performance trade-offs LAZY LOADING Concepts Prefer fetching only required data PROJECTIONS N+1 queries projections TRANSACTIONS WITH EF CORE TRANSACTIONS WITH EF CORE Fundamentals Optimistic concurrency concepts CONCURRENCY Current EF Core 10 feature awareness NAMED QUERY FILTERS SQL Server EF Core request response resources URLs Teach application structure ASP.NET CORE Built-in DI container DEPENDENCY INJECTION appsettings environment variables Development Staging Use structured logging patterns LOGGING CONTROLLERS CONTROLLERS Fundamentals Teach modern .NET API style MINIMAL APIs ROUTING ROUTING Fundamentals MODEL BINDING MODEL BINDING Fundamentals VALIDATION VALIDATION Fundamentals Do not expose database entities directly Implement consistent error format API ERROR HANDLING Use standardized API errors PROBLEM DETAILS Generate API documentation OPENAPI SWAGGER UI SWAGGER UI Fundamentals API VERSIONING API VERSIONING Fundamentals PAGINATION PAGINATION Fundamentals FILTERING FILTERING Fundamentals SORTING SORTING Fundamentals SEARCH SEARCH Fundamentals RATE LIMITING RATE LIMITING Fundamentals OUTPUT CACHING OUTPUT CACHING Fundamentals COMPRESSION COMPRESSION Fundamentals FILE APIs FILE APIs Fundamentals LARGE FILE STREAMING LARGE FILE STREAMING Fundamentals WEBHOOKS WEBHOOKS Fundamentals payments orders identity authentication users roles access token claims REFRESH TOKENS REFRESH TOKENS Fundamentals ROLE-BASED AUTHORIZATION ROLE-BASED AUTHORIZATION Fundamentals Powerful ASP.NET feature POLICY-BASED AUTHORIZATION RESOURCE-BASED AUTHORIZATION RESOURCE-BASED AUTHORIZATION Fundamentals OAUTH2 OAUTH2 Fundamentals OPENID CONNECT OPENID CONNECT Fundamentals Enterprise authentication Current hiring explicitly asks for Entra/AuthN/AuthZ skills authorization validation CORS CORS Fundamentals CSRF Concepts CSRF AWARENESS Fundamentals local development secrets Azure Key Vault in cloud DATA PROTECTION DATA PROTECTION Fundamentals JWT HTML HTML Fundamentals CSS CSS Fundamentals RESPONSIVE UI RESPONSIVE UI Fundamentals JAVASCRIPT FUNDAMENTALS JAVASCRIPT FUNDAMENTALS Fundamentals promises async/await Primary frontend language TYPESCRIPT TYPE SYSTEM TYPE SYSTEM Fundamentals INTERFACES Fundamentals components JSX useState useEffect COMPONENT DESIGN COMPONENT DESIGN Fundamentals FORMS FORMS Fundamentals local state Context Use TanStack Query-style concepts SERVER STATE Connect to ASP.NET Core backend API INTEGRATION login token lifecycle ERROR HANDLING ERROR HANDLING Fundamentals LOADING/EMPTY STATES LOADING/EMPTY STATES Fundamentals XSS storage risk ACCESSIBILITY ACCESSIBILITY Fundamentals code splitting memoization services FULL STACK INTEGRATION FULL STACK INTEGRATION Fundamentals base URL auth headers Avoid silent contract mismatch FRONTEND/BACKEND CONTRACT chat notifications SIGNALR HUBS SIGNALR HUBS Fundamentals ASP.NET Core + SignalR + React RECONNECTION in-memory cache distributed cache caching session concepts CACHE-ASIDE Hard problem INVALIDATION BackgroundService BACKGROUND SERVICES HOSTED SERVICES Hangfire/Quartz awareness SCHEDULED JOBS producer consumer Primary Azure messaging Current job demand supports it Event routing concepts EVENT GRID Useful in cross-platform enterprise systems KAFKA Concepts Service A Message Broker Critical IDEMPOTENT CONSUMERS Avoid DB/event inconsistency OUTBOX PATTERN boundaries autonomy Do not teach microservices as default MODULAR MONOLITH FIRST SERVICE DECOMPOSITION REST SYNCHRONOUS COMMUNICATION Service Bus/events ASYNCHRONOUS COMMUNICATION TIMEOUTS RETRIES Use Polly/resilience concepts CIRCUIT BREAKER retry timeout Explain why local DB transaction does not span services safely DISTRIBUTED TRANSACTIONS SAGA OUTBOX Catalog Order unit integration Primary modern .NET testing framework XUNIT Current enterprise jobs may use any NUNIT/MSTEST Concepts Moq/NSubstitute-style concepts MOCKING UNIT TESTING SERVICES CONTROLLER/API TESTING ASP.NET Core integration testing WEBAPPLICATIONFACTORY DATABASE INTEGRATION TESTS Use real disposable dependencies TESTCONTAINERS Concepts Useful in microservices CONTRACT TESTING component tests Jest/Vitest ecosystem awareness Playwright awareness E2E TESTING image container For ASP.NET Core MULTI-STAGE BUILD API React CONTAINER SECURITY Pod Deployment Microsoft Azure Kubernetes Service AKS Concepts subscription resource group Deploy ASP.NET applications AZURE APP SERVICE AZURE SQL AZURE STORAGE Serverless .NET AZURE FUNCTIONS Secure secrets/certificates KEY VAULT ENTRA ID AZURE SERVICE BUS AZURE CONTAINER REGISTRY Critical observability tool APPLICATION INSIGHTS ASP.NET Core App Service ↔ ECS/EC2 concepts Azure SQL ↔ RDS Commit Build Current .NET jobs increasingly request it GITHUB ACTIONS Important Microsoft enterprise tooling AZURE DEVOPS PIPELINES PIPELINE SECRETS Dev QA rolling blue/green Terraform Bicep TERRAFORM Concepts Azure-native IaC BICEP Concepts logs metrics Use Serilog-style concepts STRUCTURED LOGGING CORRELATION IDs DISTRIBUTED TRACING OPENTELEMETRY HEALTH CHECKS PRODUCTION DIAGNOSTICS latency throughput async EF CORE PERFORMANCE CONNECTION POOLING Use k6/JMeter concepts LOAD TESTING Concepts GC allocations Awareness of modern JIT/AOT improvements .NET RUNTIME PERFORMANCE fast startup small services dependency updates secrets NuGet package review dependency scanning availability scalability Order Service Notification Service layered clean architecture Use where justified CLEAN ARCHITECTURE Modern .NET architecture awareness VERTICAL SLICE ARCHITECTURE Use selectively CQRS MEDIATOR PATTERN entities value objects E-COMMERCE SYSTEM DESIGN PAYMENT SYSTEM BOOKING PLATFORM NOTIFICATION SYSTEM tenant isolation data strategy DB LLM APIs structured output Teach Microsoft-oriented AI integration patterns MICROSOFT AI SDK / SEMANTIC KERNEL Concepts User VECTOR SEARCH Concepts prompt injection