Asp.net interview questions.

 What are the different kinds of assemblies?

There can be two types of assemblies.

i.) Static assemblies -

- They are stored on disk in portable executable files.
- It includes .NET Framework types like interfaces and classes, resources for the assembly (bitmaps, JPEG files, resource files etc.).

ii.) Dynamic assemblies -

- They are not saved on disk before execution rather they run directly from memory.
- They can be saved to disk after they have been executed.

Explain the steps to be followed to use Passport authentication.

1. Install the Passport SDK.
2. Set the application’s authentication mode to Passport in Web.config.
3. Set authorization to deny unauthenticated users.
3. Use the PassportAuthentication_OnAuthenticate event to access the user’s Passport profile to identify and authorize the user.
4. Implement a sign-out procedure to remove Passport cookies from the user’s machine.

Explain the advantages of Passport authentication.

User doesn’t have to remember separate user names and passwords for various Web sites
User can maintain his or her profile information in a single location.
Passport authentication also avail access to various Microsoft services, such as Passport Express Purchase.

What is caching?

Caching is the technique of storing frequently used items in memory so that they can be accessed more quickly.
By caching the response, the request is served from the response already stored in memory.
It’s important to choose the items to cache wisely as Caching incurs overhead.
A Web form that is frequently used and does not contain data that frequently changes is good for caching.
A cached web form freezes form’s server-side content and changes to that content do not appear until the cache is refreshed.