.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
 
Sign In
Register
 
Win Surprise Gifts!!!
Congratulations!!!


Top 5 Contributors of the Month
david stephan

Home >> Interview Question >> .NET Framework >> Post New Question Subscribe to Interview Questions

What are the different compiler generated methods when a .NET delegate is compiled?

Posted By :Abhisek Panda     Posted Date :December 19, 2009    Points :10   Category :.NET Framework 
Compilation of a .NET delegate results in a sealed class with three compiler generated methods whose parameters and return values are dependent on the delegate declaration. The methods are,
Invoke()
BeginInvoke() and
EndInvoke().

You can also find related Interview Question to What are the different compiler generated methods when a .NET delegate is compiled?  below: 

What is DML Compiler?

  
It translates DML statements in a query language into low-level instruction that the query evaluation engine can understand. (More...)

Difference Between GET and POST methods in HTML

  
Difference Between GET and POST methods

GET:
1) Data is appended to the URL.
2) Data is not secret.
3) It is a single call system
4) Maximum data that can be sent is 256.
5) Data transmission is faster
6) This is the default method for many browsers

POST:
1) Data is appended to the URL.
2) Data is Secret
3) It is a two call system.
4) There is no Limit on the amount of data.That is characters any amount of data can be sent.
5) Data transmission is comparatively slow.
6) No default and should be Explicitly specified. (More...)

the difference between a delegate and an event

  
the difference between a delegate and an event

Hi


Here is the difference between a delegate and an event.

Delegate:

public class VikramDel

{

public delegate void VikramExampleDelegate(int num1,string str1);

public VikramExampleDelegate VikramDeleageteCallback;

}

Event:

public class VikramEvent

{

public delegate void VikramExampleEvent(int num1,string str2);

public event VikramExampleEvent VikramEventCallback;

}

So syntax wise there is only one difference that we have to use the event keyword with the event.

So the question comes why do we have a keyword when the same work can be done without using it. But there is a reason for the existence of the keyword event. Lets take an example how would a client work with this class

VikramDel V = new VikramDel();

V.VikramDeleageteCallback +=new

VikramDel.VikramExampleDelegate (this.VikDelegate);

Here we are adding a new target to the invocation list of the delegate. The same code will work with the other class also without any problem

VikramEvent V = new VikramEvent();

V.VikramEventCallback + =new

VikramEvent.VikramExampleEvent(this.VikDelegate);

But consider a case where by instead of adding a new target to the invocation list of the delegate if I simply set a delegate to a new delegate (The difference is with the + sign being not there).

VikramDel V = new VikramDel();

V.VikramDeleageteCallback =new

VikramDel.VikramExampleDelegate (this.VikDelegate);

This code will work fine here but the same will not work with an event.

So what it means is that if we use the event keyword no client class can set it to null. This is very important. Multiple clients can use the same delegate. After multiple client have added a function to listen to the callback of the delegate. But now one of the client sets the delegate to null or uses the = sign to add a new call back. This means that the previous invocation list will not be used any more. Hence all the previous client will not get any of the callback even if they have registered for the call back.

Hence we can say that the even keyword adds a layer of protection on the instance of the delegate. The protection prevents any client to reset the delegate invocation list. They can only add or remove the target from the invocation list. (More...)

What Are the Generic Methods of System.Array?

  
The System.Array type is extended with many generic static methods. The generic static methods are designed to automate and streamline common tasks of working with arrays, such as iterating over the array and performing an action on each element, scanning the array looking for a value that matches a certain criteria (a predicate), converting and sorting the array, and so on. Below is a partial listing of these static methods (More...)

In ASP.NET page framework an automatic way to associate page events and methods is

  
AutoEventWireup attribute of the Page directive is set to true (More...)

What optimizations does the C# compiler perform when you use the /optimize+ compiler option?

  
The following is a response from a developer on the C# compiler team: We get rid of unused locals (i.e., locals that are never read, even if assigned). We get rid of unreachable code. We get rid of try-catch with an empty try. We get rid of try-finally with an empty try. We get rid of try-finally with an empty finally. We optimize branches over branches: gotoif A, lab1 goto lab2: lab1: turns into: gotoif !A, lab2 lab1: We optimize branches to ret, branches to next instruction, and branches to branches. (More...)

Can you override private virtual methods in .NET Framework?

  
No, moreover, you cannot access private methods in inherited classes, have to be protected in the base class to allow any sort of access. (More...)

What's a multicast delegate?

  
It's a delegate that points to and eventually fires off several methods. (More...)

What is the role of compiler?

  
Compiler translates a high level language into machine language. (More...)

Quick Links For Interview Questions Categories:
ASP.Net Windows Application   .NET Framework   C#   VB.Net   ADO.Net  
Sql Server   SharePoint   Silverlight   OOPs   JQuery   JavaScript/VBScript
Biztalk Patten/Practices .IIS WCF WPF WWF
Networking Aptitude Others   All      

Find questions, FAQ's and their answers related to .NET, C#, Vb.Net, Sql Server and many more.

 
Now you can find lots of .NET, C#, Vb.Net, SQL Server,Windows, ASP.Net related Questions and their Answers here at www.dotnetspark.com. Our aim is to help you pass your certification Exams (MCP, MCSD, MCAD etc.,) with flying scores and get good name in your company.

So, Start looking our Interview Question section daily and improve your .NET Skills. You can also help others by posting Interview Questions and their Answers in this section.


Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend