Introduction to WCF

Windows Communication Foundation (Code named Indigo) is a programming platform and runtime system for building, configuring and deploying network-distributed services. It is the latest service oriented technology; Interoperability is the fundamental characteristics of WCF. It is unified programming model provided in .Net Framework 3.0. WCF is a combined features of Web Service, Remoting, MSMQ and COM+. WCF provides a common platform for all .NET communication.

Below figures shows the different technology combined to form WCF.

Extension Methods

Extension Methods:
------------------------
-It is one of the best approach to extend the functionalities of a class other than inheritance.

-Using this approach u can add new methods under an existing class even if u dont have permission to make changes on the class or the source code of the class is not available.

Exceptions & Exception Handling

Exceptions & Exception Handling:
--------------------------------------------
-Generally under every program we will be comming across errors which are of 2 types:
     -Compile Time Errors
     -Run Time Errors

-A compile time error occurs due to the syntactical mistake that occurs in a program, these are not considered to be dangerous.

Assemblies in C#.net

Assemblies:
----------------
-An Assembly is a unit of file that contains the IL Code corresponding to a project when it was compiled.

-The name of an assembly will be same as the project from which it was created.

-Assemblies are known as units of deployment because once the application development is completed what we install on the clients machines is the assemblies only.

Abstract Classes in c#.net

Abstract Classes:
----------------------
-A class which contains any abstract methods in it is known as an abstract class.

What is an Abstract Method ?
---------------------------------------
Ans: A method which doesn't contain any method body to it is known as an abstract method.
-An abstract method should be declared with the "abstract" modifier.

eg: public abstract void Add();

LINQ

1. Creates a class DataContext referring to the Database under which the table is present.
eg: CSharp7DataContext

2. Creates a seperate class referring to each table that is placed on the OR-Designer. The name of the class will be same as the table name.
eg: Emp or Students

NESS TECHNOLOGIES INTERVIEW QUESTIONS

NESS TECHNOLOGIES INTERVIEW QUESTIONS

·         Difference between private, public and protected fields.

·         Restrict setting a property in another assembly.

·         Is it mandatory to override a virtual method?

·         Overriding scenario

SECOND HEIGHEST SAL IN SQL

select name,sal
from(
            select name,sal,ROW_NUMBER() over (order by sal desc) as rowid from sal
      )A
where rowid=2second heighest sal in sql

string manipulation in c#.net

using System.Text;
namespace string_function
{
    class Program
    {
        static void Main(string[] args)
        {
            string firstname;
            string lastname;

ASP.NET CONTROL EVENTS

Control events

1.     This event is fired when IsPostBack is true.

2.     Use these events to handle specific control events, such as a Button control's Click event or a TextBox control's TextChanged event.

ASP.NET PAGE LIFE CYCLE

1.) What is asp.net life cycle ? 
Life Cycle Events

PreInit

The properties like IsPostBack have been set at this time.

This event will be used when we want to: 

1.     Set master page dynamically.