Session Management Interview questions in asp.net

Session Management Interview questions in asp.net

Q) What is session state? (Session Management Interview questions -1)

  Since HTTP is a stateless protocol , the server treat each request as a new request that is ,it will not hold any previous request state . In order to hold values like user details , browser data etc we have session .

Q) What are the alternatives of session states ? (Session Management Interview questions -2)

• Application state : Stores data in memory which is accessible to all users.
• Profile Properties : It persists user data without expiring it.
• ASP.Net Caching : Stored data in memory which is available to all Web Applications.
• view state : Keeps values in web page.
• Cookies : Keeps data in browser cache.
• The query string and fields on html That are available on request

Q) What is application state ? (Session Management Interview questions -3)

    Application state is the data-storage space which is available for all classes in ASP.NET application . Application state is stored in memory on server and is faster than the data stored in databases. Application state is available for all users where as the session state is specific for a given user. We can store small amount of information which is applicable to all users in your .net application .

Application state stored data in a instance of “HttpApplicationState” class.It is a keyvalue dictionary objects .Instance is created firs-time a user access any page in your application .

Q) What are the modes of session state available in asp.net ? (Session Management Interview questions -4)

 Inproc Mode : Thuis is the default mode of session storage .The data is stored on the server .

State server Mode: Stores session state in separate services called ASP.NET State service. The session state preserves even if the application is restarted or application pool recycled .We can also available session state in multiple state servers or web farms

SQL Server Mode : The session state is saved in SQL server database.

Custom Mode : Enables you to points a custom storage provider .

Off Mode : Which dissables session state.

Q) What is state server mode and how will it works? (Session Management Interview questions -5)

In State server mode the session state is stored in a process called ASP.NET state service.It is separate from ASP.NET worker process or IIS application pools . The session state is stored in multiple web servers in a web farm.To use the state server mode , we need to configure it in Web config file.

Q) What is the default session time out ? (Session Management Interview questions -6)

The default session timeout is 20 minutes. That is if a user is idle for mor than 20 minutes then the session will be expires . How ever we can modify the session time out time up to a maximum of 526601 minutes (1 year ) for In-Process and state server mode.

Q) What are Session variables ? (Session Management Interview questions -7)

 Session variables are stored in a “sessionstaeItemCollection” object . That is exposed through the HttpContext.Session property. The session variables can be any valid datatype. The session variable collections are indexed by name or its integer index. Can be accedes by referring its name. 

Session[“FirstName”]=”test”

Q) What are Session identifiers? (Session Management Interview questions -8)

Sessions are identified by a unique identifier that can be get by using the “SessionID” Property. For a session state enabled application , each request is send from browser will be cheched for a sessionid. If the sessionid is not there then , ASP.Net creates a new session and pass the sessionid to the browser along with response. The sessionid saved in cookie by default , we can also configure the application to store sessionid in querystring in case of “cookieless” session .

Q) What is coockieless session ? (Session Management Interview questions -9)

The sessionids are stored in cookies in the browser . But we can also configure that the sessionid should not be saved in cookie in the browser by setting the “Cookieless” attribute to “true” in the session-state section of the Web.config file. ASP.Net manages the sessionid in cookie-less session state by inserting the sessionid with in the URL .