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- Can you explain the difference between ASP.NET Web Forms and ASP.NET MVC?
Answer: ASP.NET Web Forms is a page-based programming model that uses an event-driven architecture, where the developer works with controls on pages and the framework manages the state and events of the controls. ASP.NET MVC, on the other hand, is a pattern-based programming model that uses a Model-View-Controller architecture, where the developer has more control over the HTML and can easily create reusable and testable code.
- How do you handle browser compatibility issues in your ASP.NET web applications?
Answer: To handle browser compatibility issues, I test my web applications on different browsers and versions and use feature detection and fallback methods as needed.
I also use browser-specific CSS and JavaScript code to target specific browsers when necessary.
- Can you walk me through how you would implement form authentication in an ASP.NET web application?
Answer: To implement forms authentication in an ASP.NET web application, I would first set up a login page for users to enter their credentials. I would then use the FormsAuthentication class to authenticate the user by validating their credentials against a database or other external source. Once the user is authenticated, I will use the FormsAuthentication.RedirectFromLoginPage method to redirect the user to the originally requested page.
- How do you optimize the performance of an ASP.NET web application?
Answer: To optimize the performance of an ASP.NET web application, I would use caching techniques, such as output caching and data caching, to reduce the number of database queries and the amount of processing required. I would also use techniques such as minification and bundling to reduce the size of the HTML, CSS, and JavaScript files sent to the browser. I would also use Gzip compression to compress the files before sending them to the browser.
- Have you worked with any front-end JavaScript frameworks in conjunction with ASP.NET? If so, which ones and for what purpose?
Answer: Yes, I have experience working with front-end JavaScript frameworks such as AngularJS (React and Vue). I have used AngularJS for building complex and rich web applications, React for building reusable UI components and Vue for building interactive user interfaces.
- Can you explain the role of a routing engine in an ASP.NET web application?
Answer: The routing engine in an ASP.NET web application is responsible for mapping incoming URLs to specific controllers and actions. This allows for clean, SEO-friendly URLs that do not include file extensions or query strings. The routing engine uses a set of rules to determine which controller and action should handle the request, and it can also extract values from the URL and pass them as parameters to the action.
- Can you explain the differences between client-side and server-side validation in ASP.NET?
Answer: Client-side validation is the process of validating user input on the client's browser, using JavaScript or similar technologies before the form is submitted to the server. This can improve the user experience by providing immediate feedback on invalid input and can reduce the number of round-trips to the server. Server-side validation is the process of validating user input on the server, after the form is submitted, using server-side code such as C# or VB.Net. Server-side validation is necessary to ensure that invalid data is not saved to the database and to protect the application from malicious input.