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What are server controls?
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Posted Date :
September 07, 2008
ASP.NET server controls are components that run on the server and encapsulate user-interface and other related functionality. They are used in ASP.NET pages and in ASP.NET code-behind classes.
You can also find related Interview Question to
What are server controls?
Database Concurrency in Sql Server.
When two or more user try to update same type of data in a table then Database Concurrency helps in this situation.
There are 2 types of Database Concurrency
Pessimistic: When one user try to change the data with pessimistic concurrency then a lock is placed on the data in a table so that another user cannot change data. when one user finishes then other user can able to change.
Optimistic: When two user works on the same data in a table and one change that data first then second user cannot change that same data becasue the which he have using is allready changed so he cannot do the change becasue change apply to another data that is changed by first user.
Is it true that COM objects no longer need to be registered on the server?
Yes and No. Legacy COM objects still need to be registered on the server before they can be used. COM developed using the new .NET Framework will not need to be registered. Developers will be able to auto-register these objects just by placing them in the 'bin' folder of the application.
The context menu can be applied for the following controls ?
Which index option causes SQL Server to create an index with empty space on
the leaf level of the index?
What do you need to specify to create a linked server?
OLE DB Data Source
When do you need to specify an external data source by using a linked server?
When you need to access a different instance.
Which authentication mode lets you use both SQL Server logins and Windows logins?
Mixed Mode authentication mode lets you use both SQL Server logins and Windows logins?
What are the types of indexes available with SQL Server?
There are basically two types of indexes that we use with the SQL Server. Clustered and the Non-Clustered.
What is the difference between Server. Transfer and Response. Redirect?
The Transfer method allows you to transfer from inside one ASP page to another ASP page. All of the state information that has been created for the first (calling) ASP page will be transferred to the second (called) ASP page. This transferred information includes all objects and variables that have been given a value in an Application or Session scope, and all items in the Request collections. For example, the second ASP page will have the same SessionID as the first ASP page.
When the second (called) ASP page completes its tasks, you do not return to the first (calling) ASP page. All these happen on the server side browser is not aware of this.
The redirect message issue HTTP 304 to the browser and causes browser to got the specified page. Hence there is round trip between client and server. Unlike transfer, redirect doesn't pass context information to the called page.
What is the difference between login controls and Forms authentication?
Login controls are an easy way to implement Forms authentication without having to write any code. For example, the Login control performs the same functions you would normally perform when using the FormsAuthentication classÃÂ¢Ã¢âÂ¬Ã¢â¬Âprompt for user credentials, validate them, and issue the authentication ticketÃÂ¢Ã¢âÂ¬Ã¢â¬Âbut with all the functionality wrapped in a control that you can just drag from the Toolbox in Visual Studio. Under the covers, the login control uses the FormsAuthentication class (for example, to issue the authentication ticket) and ASP.NET membership (to validate the user credentials). Naturally, you can still use Forms authentication yourself, and applications you have that currently use it will continue to run.
How many types of tables are present in SQL SERVER?
There are 2 types of temporary tables, local and global in sql server.
Local temporary tables are created using a single pound (#) sign and are visible to a single connection and automatically dropped when that connection ends.
Global temporary tables are created using a double pound (##) sign and are visible across multiple connections and users and are automatically dropped when all SQL sessions stop referencing the global temporary table.
Difference between Server.Transfer & Response.Redierect ?
1)Server.Transfer transfers page processing from one page directly to the next page without making a round-trip back to the client's browser. This provides a faster response with a little less overhead on the server.
2) Server.Transfer does not update the clients url history list or current url.
1)Response.Redirect is used to redirect the user's browser to another page or site. This performas a trip back to the client where the client's browser is redirected to the new page.
2) The user's browser history list is updated to reflect the new address.
How many types of validation controls are provided by ASP.NET ?
There are six main types of validation controls:-
RequiredFieldValidator: It checks whether the control have any value. It's used when you want the control should not be empty.
RangeValidator: It checks if the value in validated control is in that specific range.
CompareValidator: It checks that the value in controls should match the value in other control.
RegularExpressionValidator: When we want the control value should match with a specific regular expression.
CustomValidator: It is used to define UserDefined validation.
ValidationSummary: It displays summary of all current validation errors.
What is SQL Server Service broker?
Service Broker is a unique feature in Microsoft SQL Server 2005 which is used to by internal or external processes to send and receive guaranteed, asynchronous messages by using extensions to Transact-SQL Data Manipulation Language (DML).
It's a platform for building a new class of loosely coupled services for database applications. Service Broker not only brings asynchronous, queued messaging to database applications but significantly expands the state of the art for reliable messaging.
The key components of SQL Server Service broker are
.Queue stores the messages for a particular service.
.Dialog is a conversation between two services.
.Conversation group is a group of related conversations. Every conversation belongs to exactly one conversation group.
.Activation specifies a stored procedure that will handle messages destined for a particular service.
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