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Posted Date :
April 28, 2010
Establishes session for data exchange between computers using TCP port 139.
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Where is window Service Entries located in the system
Differences between application and session.
The session object maintains state on a per client basis whereas the application object is on a per application basis and is consistent across all client requests.
Session state vs View state
In some cases, using view state is not feasible. The alternative for view state is session state. Session state is employed under the following situations:
. Large amounts of data - View state tends to increase the size of both the HTML page sent to the browser and the size of form posted back. Hence session state is used.
. Secure data - Though the view state data is encoded and may be encrypted, it is better and secure if no sensitive data is sent to the client. Thus, session state is a more secure option.
. Problems in serializing of objects into view state - View state is efficient for a small set of data. Other types like DataSet are slower and can generate a very large view state
what is different between session and application
session is a object that store information between http request for a paticular user.
->But application object are global for each user
What is the Transport Protocol you use to call a Web Service ?
SOAP (Simple Object Access Protocol) is the preferred protocol.
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.
What are the essential components of SQL Server Service broker?
Service Broker uses queues to provide loose coupling between the message sender and the message receiver. The sender can put a message in a queue and then continue on with the application, relying on Service Broker to ensure that the message reaches its destination. Queues permit a lot of scheduling flexibility.
Dialogs are bidirectional streams of messages between two endpoints. All messages in a dialog are ordered, and dialog messages are always delivered in the order they are sent. The order is maintained across transactions, across input threads, across output threads, and across crashes and restarts.
It's a way of grouping all the dialogs that are used for a particular task. All the dialogs associated with processing a particular order would be grouped into a single conversation group. The conversation group is implemented as a conversation group identifier, which is included with all messages in all dialogs contained in the conversation group. When a message is received from any of the dialogs in a conversation group, the conversation group is locked with a lock that is held by the receiving transaction. For the duration of the transaction, only the thread that holds the lock can receive messages from any of the dialogs in the conversation group. This makes our order entry application much easier to write because even though we use many threads for scalability, any particular order is only processed on one thread at a time. This means we don't have to make our application resilient to problems that are caused by the simultaneous processing of a single order on multiple threads.
You use the activation feature of Service Broker to specify a stored procedure that will handle messages destined for a particular service. When messages arrive for a service, Service Broker checks whether there is a stored procedure running that can process the messages. If there isn't a running message-processing stored procedure, Service Broker starts one. The stored procedure then processes messages until the queue is empty, after which it terminates. Moreover, if Service Broker determines that messages are arriving faster than the stored procedure can process them, it starts additional instances of the stored procedure until enough are running to keep up with the incoming messages (or until the configured maximum number is reached). This ensures that the right number of resources for processing incoming messages are always available.
Can a .NET web application consume Java web service?
Yes Offcourse.Actually Webservices are independent to language. it depends on WSDL and SOAP. so any one can develope the Webservices anddisclose the wsdl and users can consume the webservices.wsdl and soap both are xml based.. and all languages having xml parsing
capability and access to http protocol will be able to work with Webservices.
How to remove a Session variable?
How do you invoke a web method of web service in AJAX?
In order to use a webmethod of a webservice, we need to add the reference of webservice in the
section of ScriptManager. Under services you have to configure the servicepath.
< asp:ScriptManager ID="ScriptManager1" runat="server">
< asp:ServiceReference Path="..\service1.asmx" />
How do you explicitly kill a user session?
To kill Session you have to use Session.Abandon() with this method we can explicitly kill a user session.
Is the session Timeout attribute a sliding timeout value?
The session Timeout is a sliding expiration time, meaning whever your page access session state, the expiration time will be moved forward. Please note that as long as a page has NOT disabled session state, it will access the session automatically when requested.
What is the difference between Session.Abandon() and Session.Clear()?
The major practical difference is that if you call Session.Abandon(), Session_End will be fired (for InProc mode), and in the next request, Session_Start will be fired. Session.Clear( ) just clears the session data without killing it.
Which typically consumes more memory: application state or session state?
Session state tends to use much more memory than application state, because copies of all variables are stored for each user.
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