C# interview question

Question

I am .Net core web api developer having 1 year of experience. I have an interview next week. What should I mainly focus on?

Abhishek Chadha · Answer

For your upcoming interview as a .NET Core Web API developer, here are some key areas you should focus on: Understanding of .NET Core : Make sure you have a solid understanding of the .NET Core framework, including its architecture, features, and benefits compared to previous versions of .NET. Web API Concepts : Understand the fundamentals of RESTful APIs, including HTTP methods (GET, POST, PUT, DELETE), status codes, request/response headers, and URI conventions. Be prepared to discuss how Web APIs differ from traditional web applications. ASP.NET Core Web API : Have a strong understanding of ASP.NET Core Web API framework, including routing, controllers, action methods, model binding, filters, and middleware. Be ready to explain how to create, configure, and customize Web API endpoints. Data Access : Know how to integrate data access into your Web API using Entity Framework Core or other ORMs. Understand concepts such as data models, repositories, LINQ queries, and migrations. Dependency Injection : Understand the importance of dependency injection in ASP.NET Core and how to use it to manage dependencies and promote modularity and testability in your application. Authentication and Authorization : Be familiar with authentication and authorization mechanisms in ASP.NET Core, such as JWT (JSON Web Tokens), OAuth, and Identity. Know how to implement authentication and authorization in your Web API to secure endpoints and restrict access to authorized users. Testing : Understand the importance of testing in software development and be familiar with unit testing frameworks like xUnit or NUnit. Be prepared to discuss how to write unit tests for Web API controllers and services. Performance Optimization : Have an understanding of techniques for optimizing the performance of your Web API, including caching, asynchronous programming, minimizing database round trips, and using HTTP caching mechanisms. Error Handling : Be prepared to discuss strategies for handling errors and exceptions in your Web API, including global error handling, status code mapping, and logging. RESTful Design Principles : Understand the principles of RESTful API design, including resource naming, resource representations (JSON/XML), HATEOAS (Hypermedia as the Engine of Application State), versioning, and content negotiation. Security Best Practices : Be familiar with security best practices for Web APIs, including input validation, parameter binding, SQL injection prevention, cross-site scripting (XSS) prevention, and secure communication (HTTPS). Real-world Experience : Be ready to discuss any projects or experiences you have working with .NET Core Web APIs, including challenges you faced, solutions you implemented, and lessons you learned. By focusing on these areas, you'll be well-prepared to demonstrate your skills and knowledge as a .NET Core Web API developer during your interview. Good luck!