1. What is the purpose of the web.config file in ASP.NET?
The web.config file in ASP.NET is used to store configuration settings for a web application, such as connection strings, authentication settings, and custom application settings.
2. How can you secure sensitive information in the web.config file?
Sensitive information in the web.config file can be secured by using the <appSettings> section with encryption or by storing sensitive data in a separate configuration file with restricted access.
3. What is the difference between <appSettings> and <connectionStrings> in the web.config file?
The <appSettings> section is used to store key-value pairs of custom application settings, while the <connectionStrings> section is used to store database connection strings.
4. How can you handle errors in the web.config file?
Errors in an ASP.NET application can be handled by configuring the <customErrors> section in the web.config file to redirect users to a custom error page or display detailed error messages.
5. What is the purpose of the <authentication> section in the web.config file?
The <authentication> section in the web.config file is used to configure authentication settings for the web application, such as forms authentication, Windows authentication, or Passport authentication.
6. How can you enable debugging in the web.config file?
Debugging can be enabled in the web.config file by setting the <compilation debug="true"> attribute in the <system.web> section to allow debugging information to be displayed in the browser.
7. What is the role of the <httpHandlers> and <httpModules> sections in the web.config file?
The <httpHandlers> section is used to define custom HTTP handlers for processing specific types of requests, while the <httpModules> section is used to define custom HTTP modules for intercepting and processing requests.
8. How can you configure session state in the web.config file?
Session state can be configured in the web.config file by setting the <sessionState> section with options such as in-process, SQL Server, or State Server mode, and specifying session timeout values.
9. What is the purpose of the <globalization> section in the web.config file?
The <globalization> section in the web.config file is used to configure globalization settings for the web application, such as specifying the default culture and UI culture for the application.
10. How can you restrict access to specific directories in the web.config file?
Access to specific directories can be restricted in the web.config file by using the <authorization> section to define access rules based on user roles or deny access to certain users.
11. How can you configure custom error pages in the web.config file?
Custom error pages can be configured in the web.config file by setting the <customErrors> section with options to redirect users to specific error pages based on different HTTP status codes.
12. What is the purpose of the <compilation> section in the web.config file?
The <compilation> section in the web.config file is used to configure compilation settings for the web application, such as specifying debug mode, target framework version, and batch compilation.
13. How can you configure URL rewriting in the web.config file?
URL rewriting can be configured in the web.config file by using the <rewrite> section with rules to redirect or rewrite URLs based on specific patterns or conditions.
14. How can you configure caching settings in the web.config file?
Caching settings can be configured in the web.config file by setting the <caching> section with options to enable output caching, fragment caching, or data caching for improved performance.
15. How can you set custom HTTP headers in the web.config file?
Custom HTTP headers can be set in the web.config file by using the <httpProtocol> section with options to add custom headers, set cache control directives, or configure content compression.