#dotnetcoreinterviewquestions

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Most Frequently Asked .Net Core Interview Questions:

I have listed out the most frequently asked .Net Core Interview Questions in this article.

Please walk-through the questions and revise your skills here :)

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Dot Net Core Interview Questions and Answers List Summary:

Here you can find all the .Net Core Interview Questions and Answers at one place and the link of the particular article post as well.

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Dot Net Core Interview Questions and Answers - Part 21:

Q204. What are the different ways of the Session and State management in ASP .NET Core? Q205. What are cookies? How can you enable cookies in ASP .Net Core? Q206. What is Session State? How can you enable the session state in ASP .Net Core? Q207. What is caching or response caching? How can you enable caching in ASP .Net Core? Q208. What is an In-Memory cache? How can you use the in-memory cache in ASP .NET Core? Q209. What is Cache busting? How Cache busting is handled in ASP .NET Core? Q210. What is Query String? Q211. What are Hidden Fields? Q212. What is TempData? Q213. What are the different ways to pass data from controller to view in ASP .Net Core?

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ASP .Net Core Interview Questions and Answers - Part 20:

Q194. What is XSRF and CSRF attack? Q195. What is an Antiforgery Token? How does ASP .Net Core prevent XSRF/CSRF attacks? Q196. What is Tag Helpers (TagHelpers) in ASP .Net Core? Q197. What is FormTagHelper in ASP .NET Core? Q198. What are self-closing tag helpers in ASP .Net Core? Q199. What is API Documentation in ASP .Net Core? What are the different ways to generate API Documentation? Q200. What is Swagger? How can you integrate it into ASP .Net Core? Q201. What is OpenAPI Specification? Q202. What is the difference between OpenAPI and Swagger? Q203. What is the @page directive?

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Dot Net Core Interview Questions and Answers - Part 17:

Q166. What is Entity Framework Core? How can you use Entity Framework Core in ASP .Net Core? Q167. What is Database or EF Core Migration in ASP .Net Core? Why do we need the DB Migration? Q168. What is CORS? How to enable CORS in ASP .NET Core? Q169. How can you enable CORS by using middleware in ASP .NET Core? What is the use of UseCors() middleware? Q170. How can you enable CORS by Endpoint Routing in ASP .NET Core? Q171. How can you enable CORS by Attributes in ASP .NET Core? Q172. How can you specify the CORS for multiple subdomains in the ASP .Net Core app? - OR - What is SetIsOriginAllowedToAllowWildcardSubdomains method? Q173. How can you specify the CORS only for the GET type method in the ASP .Net core? Q174. How can you disable the CORS in ASP .Net Core app?

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Dot Net Core Interview Questions and Answers - Part 16:

Q156. What is dependency injection? What problems does Dependency Injection solve? Q157. How to implement Dependency Injection in .NET Core? How dependency injection works in ASP .NET Core? Q158. What is the built-in IoC Container in ASP .Net Core? Q159. What are service lifetimes in .NET Core? Q160. What is the difference between AddTransient(), AddScoped(), and AddSingleton in .Net Core? Q161. What are the different ways to inject and access the registered services in the DI container? Q162. How can you register and use the Entity Framework Context in the ASP .Net Core? Q163. How do the services disposed from the built-in IoC container of the .Net Core? Q164. How to register a service with multiple interfaces in ASP .NET Core DI? Q165. How to implement the Repository Pattern in the ASP .Net Core project?

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Dot Net Core Interview Questions and Answers - Part 15:

Q145. What are the different built-in validation attributes available in ASP .Net MVC Core? Q146. How can you display validation errors in ASP .Net Core applications? What is the difference between asp-validation-summary and asp-validation-for tag helpers? Q147. What is the difference between Client-Side and Server-Side Validation? Q148. What is Remote Validation in ASP .Net Core? Q149. What is the behavioral difference of [Required] attribute from ClientSide to Server Side validation? Q150. How to assign a null value to the DateTime object? Q151. What is the use of the Nullable Required attribute? Why do we need this? Q152. How can you disable client-side validation in ASP .Net Core MVC? Q153. What is Razor Page in .Net Core? Q154. What is the @page directive in ASP .Net Core MVC? Q155. What is the use of the Pages folder in ASP .Net Core MVC?

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Dot Net Core Interview Questions and Answers - Part 14:

Q135. How does logging work in .Net Core? What are the different log providers in .Net Core? Q136. What are log levels? What are the different log levels available in .Net Core? Q137. How can you configure logging in ASP .Net Core applications? Q138. How can you write the log files in the text file in ASP .Net Core applications using logger? Q139. What is LoggerMessage in ASP .Net Core? How it is different from Logger? Q140. What is the model state? What is the difference between model binding and model validation in ASP .Net MVC Core? Q141. What is model validation in ASP .Net Core? Q142. What is Model Level Error Message in ASP .Net Core? How can you add a custom model error? Q143. How can you create a Custom Model Validation Attribute in ASP .Net Core? Q144. What is the Validation attribute? What are Data Annotations?

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Dot Net Core Interview Questions and Answers - Part 13:

Q124. What are the different ways to handle Errors and Exceptions in .Net Core applications? Q125. What is the use of app.UseDeveloperExceptionPage() middleware in .Net Core applications? Q126. What is the difference between UseDeveloperExceptionPage and UseExceptionHandler? Q127. What is the app.UseStatusCodePages() middleware in ASP .NET Core? Q128. What is UseStatusCodePagesWithRedirects middleware? What is the difference between UseStatusCodePages and UseStatusCodePagesWithRedirects? Q129. What is UseStatusCodePagesWithReExecute middleware? What is the difference between UseStatusCodePagesWithReExecute and UseStatusCodePagesWithRedirects? Q130. What is the SkipStatusCodePages attribute in ASP .Net MVC Core? Q131. What is AddDatabaseDeveloperPageExceptionFilter() in ASP .Net Core Application? Q132. What is the difference between Exception filters and built-in UseExceptionHandler middlewares in ASP .Net Core? Q133. How can you handle model validation errors and exceptions in ASP .Net Core applications? Q134. How can you handle client responses for the user-defined custom exceptions? What is ProblemDetailsFactory middleware?

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Dot Net Core Interview Questions and Answers - Part 11:

Q104. What is Forwarded Headers Middleware in .Net Core? What should be their order in the middleware? Q105. What is the difference between MapGet() and Map() methods? Q106. What are the different built-in middlewares in ASP .Net Core? Q107. How can you create your own custom middleware and register it in the middleware in .Net Core? Q108. What is the difference between IMiddleware and IMiddlewareFactory Interface? When we should use Factory-Based Middleware in the .Net Core? Q109. What is the difference between synchronous and asynchronous middleware? Q110. How can you configure multiple middlewares in .Net Core? Q111. How can you configure the default file in the .Net Core Application? Q112. What is the difference between Httphandler, Httpmodules, and ASP .NET Core Middleware? Q113. How can you disable middleware in ASP .NET Core?

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Dot Net Core Interview Questions and Answers - Part 10:

Q094. What is Middleware in ASP.NET Core? How it is different from HttpHandlers and HttpModules of classic ASP.Net? Q095. What is the use of the Middleware in the ASP.Net Core App? Q096. Where the Middlewares are registered in the .Net Core Application? Q097. What is the order of Middlewares in the .Net Core App? Why ExceptionHandler middleware is placed very first in ASP.NET Core? Q098. How can you configure the Middleware Component in ASP.Net Core? What is the use of Configure() method? Q099. What is Request Delegate in .Net Core? Q100. What is the difference between app.Use() and app.Run() methods in .Net Core? Q101. How to Configure Middleware Components using the Use() extension method? Q102. How to Configure Middleware Components using the Run() extension method? Q103. What is the use of next.Invoke() method in .Net Core? What are the limitations of using this?

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Dot Net Core Interview Questions and Answers - Part 09:

Q084. How can you read values from JSON configuration files? Q085. What is the difference between GetSection(), GetValue(), and Value in ASP .NET Core? Q086. What is the Options Pattern in ASP .NET Core? What is Option Class? Q087. What is the Bind() method in ASP .NET Core? How you can read an array configuration file in .Net Core? Q088. How you can read an XML configuration file in .Net Core? What is XMLConfiguration Provider in .Net Core? Q089. How you can read the JSON configuration file in .Net Core? What is JSON Configuration Provider in .Net Core? Q090. How can you use the configuration in MVC View in .Net Core? Q091. What is an In-Memory configuration provider in .Net Core? Q092. How can you read the config values from CLI in .Net Core? Q093. What is the difference between Host and App Configuration in ASP .NET Core?

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Dot Net Core Interview Questions and Answers - Part 08:

Q073. What is the use of the launchSettings.json file in ASP.NET Core? Q074. What is the use of a global.json file in ASP.NET Core? Q075. What is the use of the appsettings.json file in ASP.NET Core? Q076. What is the use of the bundleconfig.json file in ASP.NET Core? Q077. What is the use of the project.json file in ASP.NET Core? How it is different from the project.lock.json file? Q078. What is the use of the bower.json file in ASP.NET Core? Q079. What is the use of package.json in ASP.NET Core? Q080. What is the appsettings.Environment.json file in .Net Core? Q081. What is the Environment Variable in ASP.NET Core? How can you read the Environment Variables? Q082. How to use multiple startup files based on environments in ASP.NET Core? Q083. What is DbContext in .Net Core? How can you define the database connection string in ASP.Net Core?

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Dot Net Core Interview Questions and Answers - Part 07:

Q063. What is ConfigureServices() method in .NET Core? Is it mandatory to define the ConfigureServices method? Where does the ConfigureServices() method defined in the .Net Core application? Q064. What is Configure() method in .NET Core? Where does the Configure() method defined in the .Net Core application? Q065. What is the difference between the ConfigureServices() and Configure() methods of the Startup.cs class? Q066. What is the use of the .csproj file in .Net Core? How it is different from the traditional ASP.Net's .csproj file? Q067. What is wwwroot folder in ASP.NET Core? Why it is required? Q068. How does ASP.NET Core serve static files? What is FileServer middleware in ASP.Net Core? Q069. What are Configuration files? How does Application Configuration work in ASP.NET Core? Q070. What is the default Configuration Files loading order in.Net Core? Q071. What are configuration JSON files in ASP.Net Core? Why the web.config files are removed from the .Net Core? Q072. What are the different JSON Configuration files available in the ASP.Net Core project?

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Dot Net Core Interview Questions and Answers - Part 06:

Q053. What is WebListener? When you should use WebListner? Q054. What is a Self-Hosting or Self-hosted Web Application? Q055. What is Host in .NET Core? What is the difference between Host and WebHost? Q056. What is a Generic Host in .NET Core? Q057. What is IWebHost interface in ASP .NET Core? Q058. What is WebHostBuilder() method in .Net Core? What is the difference between HostBuilder vs WebHostBuilder? Q059. What is the use of IWebHostEnvironment? What is the difference between IWebHostEnvironment and IHostingEnvironment in .Net Core? Why Server.MapPath() not working in ASP .Net Core? Q060. What is HttpContext? How to access HttpContext in ASP .NET Core? Q061. What is the Application Startup Process in Asp .Net Core? What is the use of startup.cs file in ASP .Net Core? Q062. What is the use of Program.cs class in MVC.Net core?

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Dot Net Core Interview Questions and Answers - Part 05:

Q043. What is a Web Server? Which WebServer is used in ASP.NET Core? Q044. What is IIS? What is the difference between IIS and IIS Express? Q045. What is the application pool? What is Worker Process? Q046. What is the difference between Web Form and Web Garden? Q047. What is Kestrel in .Net Core? Q048. Why Kestrel is required in .Net Core? What is the difference between InProc and OutProc Hosting? Q049. What are the advantages of using the Kestrel web server in .Net Core? Q050. What is the difference between IIS and Kestrel? Why do we need two web servers in .Net Core? Q051. How can you install the Kestrel Server in .Net Core? Q052. What is the difference between UseIISIntegration and UseIIS in .Net Core? What is their use?