ASP.NET Core Interview Questions and Answers

Here are some common interview questions and answers for ASP.NET Core:

1.    What is ASP.NET Core and how is it different from ASP.NET?

ASP.NET Core is a cross-platform, open-source framework for building modern, cloud-based web applications. It is a re-imagining of ASP.NET, with a focus on performance, modularity, and flexibility. Unlike ASP.NET, ASP.NET Core can run on Windows, Linux, and macOS, and it includes a number of features and improvements over its predecessor.


2. What are some key features of ASP.NET Core?

Some key features of ASP.NET Core include:

Cross-platform compatibility

Improved performance and scalability

Modular architecture

Dependency injection support

Cloud-ready configuration

Built-in support for Web API and MVC

Improved tooling and debugging experience


3. How does ASP.NET Core handle dependency injection?

ASP.NET Core includes built-in support for dependency injection. This allows developers to manage dependencies between objects in their application, leading to increased modularity, testability, and maintainability.


4. How do you deploy an ASP.NET Core application?

ASP.NET Core applications can be deployed in a variety of ways, including:

Publish to a web server or hosting service

Docker containerization

Azure App Service or AWS Elastic Beanstalk

Self-hosting within a Windows Service or Console application


5. How do you configure an ASP.NET Core application?

ASP.NET Core applications can be configured using a variety of sources, including JSON or XML configuration files, environment variables, or command-line arguments. Configuration can be accessed through the IConfiguration interface, which provides a centralized location for managing configuration settings in your application.


6. What is Middleware in ASP.NET Core and how is it used?

Middleware is a component in ASP.NET Core that handles incoming HTTP requests and performs processing, such as authentication, logging, or routing. Middleware can be thought of as a pipeline of components that handle incoming requests and pass them along to the next component in the pipeline.


7. How do you secure an ASP.NET Core application?

ASP.NET Core provides a number of options for securing your application, including:

Authentication using cookies, JWT tokens, or other methods

Authorization using role-based or policy-based authorization

HTTPS encryption for sensitive data

Cross-Site Request Forgery (CSRF) protection

Input validation to prevent malicious data input.


This is just a sample of the potential questions you might be asked during an ASP.NET Core interview. Be sure to familiarize yourself with the framework and its key concepts to increase your chances of success.

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