Answer / zafar mohammed ameem

Callbacks are usually the methods which should be invoked
after execution of some method.
Asynchronous Call back is a way of invoking a method
Asynchronously (on a different thread). But before
invocation of method we provide a callback delegate which
refers to the method which should be called after execution
of async method. This method is called call back method.
AsyncCall backs are useful when user intends to execute any
method asynchronously and notify some thing after method is
finshed, without modifying the signature of the method
being called.

Answer / uma`

client has to wait untill the method that completes current
process.by using delegates we call the asynchronous calls

Answer / hrdiya

Page processing begins on a thread-pool thread, but that
thread is returned to the thread pool once an asynchronous
I/O operation begins in response to a signal from ASP.NET.
When the operation completes, ASP.NET grabs another thread
from the thread pool and finishes processing the request.
Scalability increases because thread-pool threads are used
more efficiently. Threads that would otherwise be stuck
waiting for I/O to complete can now be used to service
other requests. The direct beneficiaries are requests that
don't perform lengthy I/O operations and can therefore get
in and out of the pipeline quickly. Long waits to get into
the pipeline have a disproportionately negative impact on
the performance of such requests.

Answer / rakesh

call multiple threads at a time

Answer / saami solutions

when a synchronous call is made, the calling thread is
blocked until the method completes whereas an asynchronous
call is made on a different thread, and this allows the
original thread to continue its work while the asynchronous
call is in progress.

Answer / neeta

* Asynchronous callbacks means that a call is made from a Main Program to a .net class's method and the program continues execution.
* when the callback is made (Means the method has finished it work and returns value) ,the Main Program handles it.

WHT IS DIFFERENCES BETWEEN HTML CONTROLS AND SERVER CONTROLS.

11 Answers   HCL, Microsoft,

Is sql backend or frontend?

0 Answers  

What are skins?

1 Answers  

Can master pages be nested?

0 Answers  

what is CLR?

3 Answers   PrimeLine,

Explain server-side scripting and client-side scripting.

0 Answers  

is gateway for sms continue connected for sending sms.how?

0 Answers  

I have an excel file with data, i am importing this excel file data into Sqlserver 2005 database. while importing i am getting wrong data(ie, special characters) in one column(description column), upto some limit the data in that column is coming fine,after that data is coming like below. The "Walter" leather storage bench is one of our most popular styles. The top with the tufting and double stitching finish a very impressive piece. The size is perfect in front of beds and the storage adds another functional bonus. Open it up and sneak al���Ƴ�Â��ƴ�Ã��ƶ�Å�� al���Ƴ�Â��ƴ�Ã��ƶ�Å�� Is there anywhy to resolve this? (I am using recordset in coding for developing import process.) please help me soon.

0 Answers  

What are the types of authentications in ASP.NET?

2 Answers   Accenture, BirlaSoft,

Advantage of data Reader?

2 Answers  

What is the difference between Classic ASP and ASP.Net?

0 Answers  

What is custom control. What is the difference between custom control and user control?

2 Answers   Microsoft,