Your comprehensive resource for mastering C#, .NET Core, Angular, Entity Framework, SQL, System Design, and related technologies with a focus on interview preparation.
Welcome to the .NET & Angular Interview Questions Repository — your ultimate guide for technical interview preparation. This comprehensive collection covers 78+ carefully curated markdown files containing interview questions, answers, and practical examples across multiple technology stacks.
This repository is designed to help you:
- ✅ Strengthen your understanding of core .NET and Angular concepts
- ✅ Prepare efficiently for technical interviews at all levels
- ✅ Revise key C#, ASP.NET Core, Angular, and backend development topics
- ✅ Access structured study material with detailed Q&A format
- ✅ Master system design patterns and architectural best practices
- ✅ Practice SQL database concepts and complex queries
- ✅ Learn Azure cloud services and deployment strategies
| 📁 Category | 📄 Files | 🎯 Focus Areas |
|---|---|---|
| .NET / C# | 30+ | Core concepts, advanced features, best practices |
| Angular | 12 | Framework fundamentals, components, services |
| SQL | 11 | Database design, queries, optimization |
| System Design | 6 | Architecture patterns, microservices |
| MVC | 2 | ASP.NET MVC, filters, key concepts |
| Azure | 1 | Cloud services, deployment strategies |
| JavaScript | 1 | ES6+, fundamentals |
| General | 2 | Programming concepts, coding questions |
Total: 78+ Markdown Files
- Basics Q&A - Core C# concepts and general questions
- .NET vs .NET Core - Framework comparison and evolution
- Class & Struct - Value types vs reference types
- Constructors - Constructor types and best practices
- OOPs Concepts - Main OOP concepts overview
- Abstraction - Abstract classes and interfaces
- Encapsulation - Data hiding and access modifiers
- Inheritance - Class hierarchies and inheritance patterns
- Polymorphism - Compile-time and runtime polymorphism
- Abstract Class & Interfaces - Abstract vs interface differences
- Delegates - Delegate types and lambda expressions
- Extension Methods - Extension method patterns
- Partial Class - Partial class usage and benefits
- Static Class - Static members and singleton pattern
- Sealed Class - Sealed classes and methods
- Private Class - Private class declarations
- Protected Class - Protected access modifiers
- Managed vs Unmanaged Code - Memory management differences
- Memory Management - Garbage collection and optimization
- string vs stringBuilder - String manipulation performance
- throw vs throw ex - Exception handling best practices
- Async Programming - async/await patterns
- Async vs Multithreading - Concurrency models comparison
- Dependency Injection - DI container and service lifecycle
- Service Lifecycle - Singleton, Scoped, Transient services
- Middleware - Middleware pipeline and custom middleware
- Entity Framework - EF Core concepts and migrations
- Lifecycle of .NET Core application - Application startup and configuration
- HTTP Verbs - RESTful API methods
- API Versioning - API version management strategies
- CORS Policy - Cross-origin resource sharing
- Authentication and Authorization - Security implementation
- JWT - JSON Web Token authentication
- ConfigureServices & ConfigureMethods - Startup configuration
- Caching - In-memory and distributed caching
- Performance Optimizing - Performance best practices
- LINQ - Language Integrated Query operations
- Unit Testing - Testing strategies and frameworks
- SOLID Principles - Object-oriented design principles
- Exception Handling - Error handling patterns
- Basics - Angular fundamentals and CLI commands
- Components - Component architecture and communication
- Data Binding - Property, event, and two-way binding
- Directives - Structural and attribute directives
- Services - Service creation and dependency injection
- Routing - Route configuration and navigation guards
- Lifecycle Hooks - Component lifecycle methods
- Lazy Loading - Module lazy loading strategies
- Caching - Caching strategies in Angular
- Promise and Observable - RxJS and async programming
- General Q&A - Common SQL interview questions
- Normalization - Database normalization forms
- Index - Index types and optimization strategies
- Joins - INNER, LEFT, RIGHT, FULL OUTER joins
- 🟥 Joins - Advanced join patterns
- 🟩 Views & Temp Tables - View creation and temporary tables
- Stored Procedure & Functions - SP creation and functions
- 🟥 Stored Procedure & Functions - Advanced stored procedures
- 🟧 Magic Tables - INSERTED and DELETED tables
- 🟩 CTE & Subquery - Common Table Expressions
- Queries - Complex query examples and patterns
- Ranking - ROW_NUMBER, RANK, DENSE_RANK functions
- Design Pattern - Creational, structural, behavioral patterns
- Repository Pattern - Data access abstraction
- Singleton - Singleton implementation patterns
- CQRS - Command Query Responsibility Segregation
- Microservices - Microservices architecture
- MVC - Model-View-Controller pattern
- KeyConcepts MVC - MVC architecture and routing
- Filters - Action, authorization, and exception filters
- General Questions - Azure services and cloud concepts
- Basic Q&A - JavaScript fundamentals and ES6+ features
- Basic Q&A - General programming interview questions
- Coding Questions - Algorithm and coding problems
.NET-Interview-QUestions/
│
├── 📄 Readme.md # This comprehensive guide
├── 📁 .github/ # GitHub configurations
│ └── copilot-instructions.md
│
├── 📁 Angular/ # Angular framework (12 files)
│ ├── Basics.md
│ ├── Components.md
│ ├── Services.md
│ ├── Routing.md
│ ├── Forms.md
│ ├── Data Binding.md
│ ├── Directives.md
│ ├── Pipe.md
│ ├── Lifecycle Hooks.md
│ ├── Lazy Loading.md
│ ├── Caching.md
│ └── Promise and Observable.md
│
├── 📁 Dot Net/ # .NET and C# (30+ files)
│ ├── Basics_QA.md
│ ├── OOPs Concept/
│ │ ├── Abstraction.md
│ │ ├── Encapsulation.md
│ │ ├── Inheritance.md
│ │ ├── Polymorphism.md
│ │ └── OOPs Question.md
│ ├── Dependency Injection.md
│ ├── Entity Framework.md
│ ├── Middleware.md
│ ├── LINQ.md
│ ├── SOLID Principles.md
│ ├── Async Programming.md
│ ├── Exception Handling.md
│ ├── Authentication and Authorization.md
│ ├── JWT.md
│ ├── CORS Policy.md
│ ├── HTTP Verbs.md
│ ├── API Versioning.md
│ ├── Caching.md
│ ├── Memory Management.md
│ ├── Managed vs Unmanaged Code.md
│ ├── Class & Struct.md
│ ├── string vs stringBuilder.md
│ ├── throw vs throw ex.md
│ ├── Abstract Class & Interfaces.md
│ ├── Delegates.md
│ ├── Extension Methods.md
│ ├── Partial Class.md
│ ├── Static Class.md
│ ├── Sealed Class.md
│ ├── Private Class.md
│ ├── Protected Class.md
│ ├── Constructors.md
│ ├── Async vs Multithreading.md
│ ├── .NET vs .NET Core.md
│ ├── Lifecycle of .NET Core application.md
│ ├── ConfigureServices & ConfigureMethods.md
│ ├── Service Lifecycle.md
│ ├── Unit Testing.md
│ └── Performance Optimizing.md
│
├── 📁 SQL/ # SQL database (11 files)
│ ├── General Q&A.md
│ ├── Joins.md
│ ├── Stored Procedure & Functions.md
│ ├── Index.md
│ ├── Normalization.md
│ ├── Queries.md
│ ├── Ranking.md
│ ├── 🟥 Joins.md
│ ├── 🟥 Stored Procedure & Functions.md
│ ├── 🟧 Magic Tables.md
│ ├── 🟩 CTE & Subquery.md
│ └── 🟩 Views & Temp Tables.md
│
├── 📁 System Design/ # System design (6 files)
│ ├── Design Pattern.md
│ ├── Repository Pattern.md
│ ├── Singleton.md
│ ├── CQRS.md
│ ├── Microservices.md
│ └── MVC.md
│
├── 📁 MVC/ # ASP.NET MVC (2 files)
│ └── Filters/
│ ├── KeyConcepts_MVC.md
│ └── Filters.md
│
├── 📁 Azure/ # Azure cloud (1 file)
│ └── General Questions.md
│
├── 📁 JavaScript/ # JavaScript (1 file)
│ └── Basic_QA.md
│
└── 📁 General/ # General programming (2 files)
├── Basic_QA.md
└── Coding Questions.md
- 🗺️ Browse by Topic: Navigate to the relevant folder for your study focus
- 📝 Review Q&A Format: Each file contains structured questions and detailed answers
- 💪 Practice: Use the questions to test your knowledge and identify gaps
- 🎯 Interview Prep: Review topics relevant to your upcoming interviews
- 📚 Reference: Use as a quick reference guide during development
- Begin with Basics_QA.md for fundamental concepts
- Master OOPs Concepts for object-oriented understanding
- Study Dependency Injection for modern .NET practices
- Review Entity Framework for data access
- Practice SOLID Principles for clean code
- Start with Basics.md for framework fundamentals
- Learn Components.md for component architecture
- Master Services.md for dependency injection
- Study Routing.md for navigation
- Practice Forms.md for user input handling
- Cover both .NET and Angular sections systematically
- Review SQL Topics for database knowledge
- Study System Design patterns
- Practice General Coding Questions
- Start with General Q&A
- Master Joins for data relationships
- Practice **Stored Procedures