Dot Int Ques Lates

8/8/2019 Dot Int Ques Lates

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ASP.NET Web Forms and How is this technology different

than what is available though ASP

Web Forms are the one of best feature of ASP.NET. Web Forms are the User Interface (UI)

elements that give your Web applications their look and feel. Web Forms are similar to WindowsForms in that they provide properties, methods,and events for the controls that are placed ontothem.However these UI elements render themselves in the appropriate markup language required

by the request, e.g. HTML. If you use Microsoft Visual Studio .NET, you will also get thefamiliar drag-and-drop interface used to create your UI for your Web application.

Describe session handling in a webform

State Server is used for handling sessions in a web farm. In a web farm, make sure you have the

same in all your webservers.Also, make sure your objects are serializable. For session state to be

maintained across different web servers in the web farm, the Application Path of the website (For

example \LM\W3SVC\2) in the IIS Metabase should be identical in all the web servers in the

web farm

Web.config file in ASP.NET

Web.config file, as it sounds like is a configuration file for the Asp .net web application. An Asp

.net application has one web.config file which keeps the configurations required for thecorresponding application. Web.config file is written in XML with specific tags having specific

meanings.

We have Machine.config file also. As web.config file is used to configure one asp .net web

application, same way Machine.config file is used to configure

the application according to a particular machine. That is, configuration done in machine.config

file is affected on any application that runs on a particular machine. Usually, this file is not

altered and only web.config is used which configuring applications.

What is Web Application

Web application consists of document and code pages in various formats. The simplest kind of

document is a static HTML page, which contains information that will be formatted and

displayed by a Web browser. An HTML page may also contain hyperlinks to other HTML

pages.A hyperlink(or just link) contains an address,or a Uniform Resource Locator (URL),

specifying where the target document is located. The resulting combination of content and links


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is so metimes called hypertext and provides easy navigation to a vast amount of information on

the World Wide Web.

How to Create Virtual Directory

1. ClickStartsettingscontrol Panel Administrative Toolsinternet information services

2. Expand Internet Information Server.

3. Expand the server name.

4. In the left pane, right-click Default Web Site, point to New, and then click Virtual Directory.

5. In the first screen of the New Virtual Directory Wizard, type an alias, or name, for the virtual

directory (SiteName), and then click Next.

6. In the second screen, click Browse. Locate the content folder that you created to hold the Web

content. Click Next.

7. In the third screen, click to select Read and Run scripts (such as ASP). Make sure that the

other check boxes are cleared. Click Finish to complete the wizard.

Diffrence between Viewstate and SessionView State are valid mainly during postbacks and information is stored in client only. Viewstate

are valid for serializable data only. Moreover Viewstate are not secured as data is exposed to

client. although we can configure page directive and machine key to make view state encrypted.

Where in case of session this is user specific data that is stored in server memory . Session state

is valid for any type of objects. We can take help of session through different web pages also.

Is it possible to get vale of viewstate value on next page

View state is page specific; it contains information about controls embedded on the particular

page. ASP.NET 2.0 resolves this by embedding a hidden input field name,__POSTBACK . Thisfield is embedded only when there is an IButtonControl on the page and its PostBackUrl

property is set to a non-null value. This field contains the view state information of the posterpage. To access the view state of the poster page, you can use the new PreviousPage property of the page: Page poster = this.PreviousPage;


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How to create and removethat cookies in asp.net

This is the syntax for creating a cookies.

HttpCookie SiteCookies = new HttpCookie("UserInfo");

SiteCookies["UserName"] = "Pervej";

SiteCookies["sitename"] = "dotnetRed";

SiteCookies["Expire"] = "5 Days";

SiteCookies= DateTime.Now.AddDays(5);

Response.Cookies.Add(SiteCookies);

Now syntax to remove this cookie:-

HttpCookie SiteCookies= new HttpCookie("UserInfo");

siteCookies= DateTime.Now.A

ddDays(-1);

Response.Cookies.AddSiteCookies

How to handle two language in a single application

if we have two diffrent language class in asp.net 2.0 then simply we have to make a two folder in

asp.net one for vb and another for csharp.one another think to do entry in web.config for this.

How many space varchar 50 taken in Sql

varchar(50) means 50 bytes = 50*8 = 400 bits

1 bytes = 8 bits

each character use 1 bytes

so "dotnet" use 5 bytes = 5*8 = 40 bits in memory

Server Control and User Control


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An ASP.NET control (sometimes called a server control) is a server-side component that isshipped with .NET Framework.A server control is a compiled DLL file and cannot be edited. It

can, however, be manipulated through its public properties at design-time or runtime. It ispossible to build a custom server control (sometimes called a customcontrol or composite

control). (We will build these in part 2 of this article).

In contrast, a user cotrol will consist of previously built server controls (called constituent

controls when used within a user control). It has an interface that can be completely edited and

changed. It can be manipulated at design-time and runtime via properties that you are responsiblefor creating. While there will be a multitude of controls for every possible function built by third-

party vendors for ASP.NET, they will exist in the form of compiled server controls, asmentioned above. Custom server controls may be the .NET answer to ActiveX Web controls.

Can we update table from View that we are using

No view are only virtual table so cannot update table.

Define three test cases you should go through in unit testing

1)Positive test cases (correct data, correct output).

2)Negative test cases (broken or missing data,proper handling).

3)Exception test cases (exceptions are thrown and caught properly).

How to change the Page Title dynamically

/Declare

protected System.Web.UI.HtmlControls.HtmlGenericControl Title1 ;

//In Page_Load

Title1.InnerText ="Page 1" ;

How To work with TimeSpan Class

DateTime date1 = DateTime.Parse("11/24/2003");


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DateTime date2 = DateTime.Parse("06/28/2003"); TimeSpan ts = new TimeSpan (date1.Ticks -date2.Ticks);

Response.Write(ts.TotalDays.ToString () + "

");

Response.Write(ts.TotalHours.ToString() + ":" + ts.TotalMinutes.ToString() + ":" +

ts.TotalSeconds.ToString() + ":" + ts.TotalMilliseconds.ToString() );

What is Thread define it

A thread is just a unit for that unit processor time is being allocated by operating system. It isalso possible that there may be more then one thread in single App domain.Every App domain

starts with single thread but can do to multiple domain.There are mainly two types of thread one

is pre-emptive,Non-preemptive thread.

pre-emptive:-In this thread all things done by operating system which to run and which to not.

Non-preemptive:- Here is s equence is quite opposite after one thread is done thread then call to

other thread.

What is difference between System.String and

System.StringBuilder classes

System.String is immutable; System.StringBuilder was designed with the purpose of having a

mutable string where a variety of operations can be performed.

Can it is possible see SQL plan in textual format

Yes we can saw the textual plan in SQL by just "set showplan_text on" after doing this we will

saw the textual plan in past we will use "SHOWPLAN" the syntax is quite simple

set showplan_text on

select * from tablename

What is singlecall and singleton


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Differneces between Single Call & Singleton. Single Call objects service one and only one

request coming in. Single Callobjects are useful in scenarios where the objects are required to do

afinite amount of work. Single Call objects are usually not required tostore state information, and

they cannot hold state information betweenmethod calls. However, Single Call objects can be

configured in aload-balanced fashion.Singleton objects are those objects that service multiple

clients and henceshare data by storing state information between client invocations. Theyare

useful in cases in which data needs to be shared explicitly betweenclients and also in which the

overhead of creating and maintaining objectsis substantial.

Diffrence between Showding and overriding

. Purpose :

Shadowing : Protecting against a subsequent base class modification introducing a member youhave already defined in your derived class

Overriding : Achieving polymorphism by defining a different implementation of a procedure orproperty with the same calling sequence

2.Redefined element :

Shadowing : Any declared element type

Overriding : Only a procedure (Function or Sub) or property

3.Redefining element :

Shadowing : Any declared element type

Overriding : Only a procedure or property with the identical calling sequence

4.Accessibility :

Shadowing : Any accessibility

Overriding : Cannot expand the accessibility of overridden element (for example, cannotoverride Protected with Public)

5.Readability and writability : Shadowing : Any combination

Overriding : Cannot change readability or writability of overridden property

6.Keyword usage :


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Shadowing : Shadows recommended in derived class;Shadows assumed neither Shadows norOverrides specified

Overriding : Overridable required in base class; Overrides required in derived class 7.Inheritance

of redefining element by classes deriving from your derived class : Shadowing : Shadowing

element inherited by further derived classes; shadowed element still hidden Overriding :Overriding element inherited by further derived classes; overridden element still overridden

Diffrence between Shadowing and Hiding

Shadowing :-This is VB.Net Concept by which you can provide a new implementation for baseclass member without overriding the member. You can shadow a base class member in thederived class by using the keyword "Shadows". The method signature, access level and return

type of the shadowed member can be completely different than the base class member.

Hiding : - This is a C# Concept by which you can provide a new implementation for the base

class membe

r without overriding the member. You can hide a base class member in the derived class by using

the keyword "new". The method signature,access level and return type of the hidden member hasto be same as the base class member.Comparing the three :- 1) The access level , signature and

the return type can only be changed when you are shadowing with VB.NET. Hiding andoverriding demands the these parameters as same.

2) The difference lies when you call derived class object with a base class variable.In class ofoverriding although you assign a derived class object to base class variable it will call derived

class function. In case of shadowing or hiding the base class function will be called

Something about Session or Session Management and

Application

sessions can stored in cookies . cookieless session is also available.for cookie less session it wilcreate unique session id for each session. it wil be automatically retrieved in URL.state

management can be like, user sessions can be stored in 3 ways .

Inproc - stored in asp.net worker process

stateserver- stored in window service .


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sqlserver- user sessions can be stored in sqlserver also.Application Start This Event is fired whent he server which holding application starts whereas Session Start event is fired when any User

has access that page or Session has been created. Suppose we want to track that how many usershave accessed our sites today then Application Start is the best place to do so or we want to give

some personalised view to User than Session is the best place.

Explain session and its type

Sessions can be managed by two ways in case of webfarms:

1. Using SQL server or any other database for storing sessions regarding current logged in user.

2. Using State Server, as one dedicated server for managing sessions. State Server will run asservice on web server having dotnet installed.

In ASP.NET there is three ways to manage session objects. one support the in-proc mechanism

and other two's support the out-proc machanism.

1) In-Proc (By Default)

2) SQL-Server (Out-proc)

3) State-Server (Out-Proc)

Which file is taken by compiler when we have both file

Application and Server Configguration file

Application Configuration File Values will over ride the values of server configuration file. But

only when we allow override set as True, if we does not allow override then ApplicationConfiguration file variables cannot override the values of server configuration file.

What is serialization in .NET and What are the ways to

control serialization

Serialization is the process of converting an object into a stream of bytes. Deserialization is theopposite process of creating an object from a stream of bytes. Serialization/Deserialization is

mostly used to transport objects (e.g. during remoting), or to persist objects (e.g. to a file or


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database)Serialization can be defined as the process of storing the state of an object to a storagemedium. During this process, the public and private fields of the object and the name of the

class,including the assembly containing the class, are converted to a stream of bytes, which isthen written to a data stream. When the object is subsequently deserialized, an exact clone of the

original object is created. Binary serialization preserves type fidelity, which is useful for

preserving the state of an object between different invocations of an application. For example,you can share an object between different applications by serializing it to the clipboard. You canserialize an object to a stream,disk,memory,over the network,and so forth.Remoting uses

serializatn.to pass objects "by value" from one computer or application domain to another. XMLserialization serializes only public properties and fields and does not preserve type fidelity. This

is useful when you want to provide or consume data without restricting the application that usesthe data.Because XML is an open standard,it is an attractive choice for sharing data across the

Web. SOAP is an open standard,which makes it an attractive choice. There are two separatemechanisms provided by the .NET class library-XmlSerializer and

SoapFormatter/BinaryFormatter.Microsoft uses XmlSerializer for Web Services, and usesSoapFormatter/BinaryFormatter for remoting. Both are available for use in your own code.

How Server control handle events

ASP.NET server controls can optionally expose and raise server events, which can be handled bydevelopers.Developer may accomplish this by declaratively wiring an event to a control (where

the attribute name of an event wireup indicates the event name and the attribute value indicatesthe name of a method to call).

Private Sub Btn_Click(Sender As Object, E As EventArgs)

Message.Text = "http://www.dotnetquestion.info"

End Sub

Diffrence Between ServerSide and ClientSideCode

server side code is responsible to execute and provide the executed code to the browser at the

client side. the executed code may be either in XML or Plain HTML. the executed code onlyhave the values or the results that are executed on the server. The clients browser executes the

HTML code and displays the result.

where as the client side code executes at client side and displays the result in its browser. it the

client side core consist of certain functions that are to be executed on server then it places requestto the server and the server responses as the result in form of HTML.


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What is Server.Transfer and Response.Redirect

Server.Transfer transfers page processing from one page directly to the next page withoutmaking a round-trip back to the client's browser. This provides a faster response with a little less

overhead on the server. Server.Transfer does not update the clients url history list or current url.

Response.Redirect is used to redirect the user's browser to another page or site. This performas atrip back to the client where the client's browser is redirected to the new page. The user's browserhistory list is updated to reflect the new address.

.

What is Remoting

The process of communication between different operating system processes, regardless of

whether they are on the same computer. The .NET remoting system is an architecture designed

to simplify communication between objects living in different application domains, whether onthe same computer or not, and between different contexts, whether in the same applicationdomain or not.

How do I make a reference type parameter as a readonly

parameter

Assuming that it is, and that all the data fields are only accessible via parameters, then you can

create an interface for the class that only allows access to the parameters via a get. Add thisinterface to the class definition, then where you need the instance of the class to be read only,access it through the interface.

What is Reflection in .NET

All .NET compilers produce metadata about the types defined in the modules they produce.This

metadata is packaged along with the module (modules in turn are packaged together inassemblies), and can be accessed by a mechanism called reflection. The System.Reflection

namespace contains classes that can be used to interrogate the types for a module/assembly.

What is Code Refactoring

Its a feature of Visual Web Express & Visual Studio 2005. Code Refactoring Code Refactoring enables you

to easily and systematically make changes to your code. Code Refactoring is supported everywhere that


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you can write code including both code-behind and single-file ASP.NET pages. For example, you can use

Code Refactoring to automatically promote a public field to a full property

How to read transaction Log in Sql

DBCC LOG([,{0|1|2|3|4}])

0 - Basic Log Information (default)

1 - Lengthy Info

2 - Very Length Info

3 - Detailed

4 - Full Example

and syntax is as follows

DBCC log(db,4)

What is read only and its example

A read only member is like a constant in that it represents an unchanging value. The difference isthat a readonly member can be initialized at runtime, in a constructor as well being able to be

initialized as they are declared. For example

public class MyClass

{

public readonly double PI = 3.14159;

}

Because a readonly field can be initialized either at the declaration or in a constructor, readonlyfields can have different

values depending on the constructor used. A readonly field can also be used for runtime

constants as in the following example public static readonly uint l1 = (uint)DateTime.Now.Ticks

Define what the function RANK function do and how it

different from ROW NUMBER


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The RANK() function have same as ROW_NUMBER but the diffrence is on its ouput its displayduplicate values are treated as diffrent with this

syntax:- select firstcol,secondcol,rank() over(order by secondcol) as rownumber from tablename

What is RAD

Rapid application development (RAD), is a software development process developed initially by

James Martin in the 1980s.The methodology involves iterative development, the construction of

prototypes, and the use of Computer-aided software engineering (CASE) tools. Traditionally the

rapid application development approach involves compromises in usability,features,& /or

execution speed.Increased speed of development through methods including rapid

prototyping,virtualization of system related routines, the use of CASE tools, and other

techniques. Increased end-user utility Larger emphasis on simplicity and usability of GUI

design.Reduced Scalability, and reduced features when a RAD developed application starts as

prototype and evolves into a finished application Reduced features occur due to time boxing

when features are pushed to later versions in order to finish a release in a short amount of time

How to check querystring is null or not

string queryStringVal = Request.QueryString["field"];

if (string.IsNullOrEmpty(queryStringValue))

{

}

else

{

}

How to encode query string in ASP.NET

ere is syntax in vb.net for encodeing:-

code on first page from where you are using querysting

Dim firstfield As String = "firstfieldval"


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Dim secondfield As String = "secondval"

Dim url As String = String.Format("secondpage.aspx?{0}&{1}", Server.UrlEncode(firstfield),Server.UrlEncode(secondfield))

Response.Redirect(url)

code on the second page to get querystring value

Dim firstf

ield As String =Server.UrlDecode(Request.QueryString"firstfieldval")) Dim secondfield As

String = Server.UrlDecode(Request.QueryString("secondval")

Some Popular SQL Queries

(1)Write a SQL Query to find first Week Day of month?

SELECT DATENAME(dw, DATEADD(dd, - DATEPART(dd, GETDATE()) + 1,GETDATE())) AS FirstDay

(2)How to find 6th highest salary from Employee table

SELECT TOP 1 salary FROM (SELECT DISTINCT TOP 6 salary FROM employee ORDERBY salary DESC) a ORDER BY salary

(3)How to get number of column in table:--

select * from information_schema.columns where table_name='t able_name'

sp_columns 'table_name'

(4)Delete duplicate row from table

INSERT INTO #temp SELECT DISTINCT * FROM yourtable

select * into #temp select distinct * from yourtable

truncate table yourtable

insert into yourtable select * from #temp

(5)display all undeleted rows.

SELECT * FROM Table WHERE isnull(Is_deleted,0) = 0


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(6)How to Select top 3 salry from tables

SELECT TOP 3 emp_id, emp_name, salary , dept_id FROM employee WHERE dept_id =training dept ORDER BY salary DESC

(7)How to know how many tables contains empno as a column in a database?

SELECT COUNT(*) AS Counter FROM syscolumns WHERE (name = 'empno')

(8)Write a query to round up the values of a number. For example even if the user enters 7.1 it

should be rounded up to 8.

SELECT CEILING (7.1)

(9)Write a query to convert all the letters in a word to upper case

SELECT UPPER('test')

(10)How to get duplicate row in a table

select name from emp group by name having count(name)>1

(11)How to rename a table from query

exec sp_rename 'oldTableName' , 'newTableName'

What is Pull and Push Model in ado.net

Answer:- Pull model is used to pick out the element or we can also say objects from Database

tabel.

Push model is used to insert the element only at the top position in table to database with the help

of object. But when we have to delete the top most record pull method is used over push. Similarto stack operation

What are publisher and distributor and subscriber in

Replication

Publisher is main source of data and we can say its the owner of the database.And its takes

decision how to distribute data accross.

Distributor is a bridge between publisher and the subscriber.Distributor is one who gathers all the

data which is published by publisher and take it before send it to subscriber. So it is clear that itis bridge between publisher and subscriber and its supports multiple publisher and subscriber

concepts.


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Subscri ber is end source or the final place where data has to be transmitted.

What is Property

A property is a thing that describes the features of an object. A property is a piece of data

contained within class that has an exposed interface for reading/writing. Looking at thatdefinition, you might think you could declare a public variable in a class and call it a property.

While this assumption is somewhat valid, the true technical term for a public variable in a classis a field. The key difference between a field and a property is in the inclus ion of an interface.

We make use of Get and Set keywords while working with properties. We prefix the variablesused within this code block with an underscore. Value is a keyword, that holds the value which is

being retrieved or set.

Private _Color As String

Public Property Color()

Get

Return _Color

End Get

Set(ByVal Value)

_Color = Value

End Set

End Property

Relationship between a ProcessApplication

DomainApplication

A process is only a instance of running application. An application is an executable on the hard

drive or network.There can be numerous processes launched of the same application (5 copies of

Word running), but 1 process can run just 1 application.


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What the difference between a primary key and a unique

key

Both primary key and unique enforce uniqueness of the column on which they are defined.But

by default primary key creates a clustered index on the column, where are unique creates anonclustered index by default. Another major difference is that, primary key doesnt allow

NULLs, but unique key allows one NULL only.

How to prevent .NET DLL to be decompiled

Answer:-ILDASM help us to decompile the .net dll similarly there are third party tool that can

decompile the dll and easily get the source code.The process that help to stop this is called

"obfuscation" it is technique which not allow tool to decompile there are many third party tool

also available.

What is PostBack and Callback

One technique that current ASP.NET 1.0/1.1 developers use to overcome this postback problemis to use the Microsoft XMLHTTP ActiveX object to send requests to server-side methods from

client-side JavaScript. In ASP.NET 2.0, this process has been simplified and encapsulated withinthe function known as the Callback Manager.

The ASP.NET 2.0 Callback Manager uses XMLHTTP behind the scenes to encapsulate the

complexities in sending data to and from

the servers and clients. And so, in order for the Callback Manager to work, you need a web

browser that supports XMLHTTP. Microsoft Internet Explorer is, obviously, one of them.

What is the diffrence between Pivot an Unpivot

These tow are th opertor in Sql Server 2005 these are used to manupulate a expression from one

table into another table but bothe are opposite of each other Pivot take rows and put them into the

column but on the other hand Unpivot take column and put them into the row.Pivots helps in

rotating unique in one column from mutliple columns.

What is a parser error

Its basically a syntax error in your ASPX page. It happens when your page is unreadable for the

part of ASP.NET that transforms your code into an executa


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Display the number of users sessions currently active your

website

Using the Session_Start and Session_End Events

Sub Session_Start(ByVal sender As Object, ByVal e As EventArgs)

' Fires when the session is started

Application("UserCount") = Application("UserCount") + 1

End Sub

Sub Session_End(ByVal sender As Object, ByVal e As EventArgs)

' Fires when the session ends

Application("UserCount") = Application("UserCount") - 1

End Sub

To Display UserCount, add a Label Control to the We

bForm, name it lblUserCount Private Sub Page_Load(ByVal sender As System.Object, ByVal e

As System.EventArgs) Handles MyBase.Load

'Put user code to initialize the page here

Me.lblUserCount.Text = "User(s) online " & Application("UserCount")

End Sub

can you explain difference between .Net framework and .Net

Compact Framework

Answer:-As the name suggest to us that .Net compact framework has been created with enabling

managed code on devices just like PDAs,mobiles etc. These are compact devices for which a.NET compact framework is used.This is main diffrence between these two.

How can we load multiple tables in to Dataset

Write the select queries required in fill statement.

e.g.


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Adp.Fill("Select * from Table1;Select * from Table2;Select * from Table3",DS)

This statement wil generate Dataset with 3 datatables.

Why multiple Inheritance not work in C sharp

When we use the Multiple inherutance we use more than one class. Lets one condition class A and class

B are base classes and class c is is multiple inherting it.And where class c is inheriting a function .It may

be possible that this function with same name and same signature can present in both class A and Class

B . That time how the compiler will know that which function it should take wherether from class A or

class B.So Multiple inheritance show's an error.

How do you write the multiple class in one tag

Using the following way you can set two classes.

it will apply two css class named first and second

What is MSIL

MSIL supports OO programming, so we can have a class which has public and private methods.

The entry point of the program needs to be specified. In fact it doesn't really matter whether the

method is called Mam or Dad. The only thing that matters here is that .entrypoint is specified

inside method. MSIL programs are compiled with ilasm compiler. Since we are writing a

managed assembly code, we have to make sure that no variables are allocated in memory when

the program goes out of scope. Here is a more complicated program that, once again, does not do

anything but has some dataThe sample MSIL program.method static void main(){ .entrypoint

.maxstack 1 ldstr "Hello world!" call void [mscorlib]System.Console::WriteLine(string) ret}.

Different ways of moving data from databases

There are different methods of moving data

(1)BACKUP and RESTORE


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(3)In Visual Studio 2008 we can build game there is a library kits

for games developers. currently this game development kits are available for C++ and also2D/3D Dark Matter one image and sounds sets. (4)One of most useful feature of .net3.5 is we

can able to create,run,debug .NET 2.0, .NET 3.0, .NET 3.5 application. We can also deploy

.NET 2.0 application in machine where .NET 2.0 is not installed.

(5)In previous version we have to make a seprate setup of AJAx Control library but in Visual

2008 there is a built-in AJAX Contrl library.

(6)One of most good feature is that now we can debug Javascript we can set a break point in

javascript.

(7)In VS 2008 you can even edit the nested master pages.

(8)Visual Studio 2008 contains intellisense support for javascript.

(9)VS 205 has a feature show both design and source code in single window. but both the

windows tiles horizontally.

(10)In VS 2008 we can create, debug and deploy the silverlight applications.

(11)In VS 2008 there is Inbuilt C++ SDK

There are several other reasons why you might want to use interfaces instead of class

inheritance:

y

Interfaces are better suited to situations in which your applications require many possiblyunrelated object types to provide certain functionality.

y Interfaces are more flexible than base classes because you can define a singleimplementation that can implement multiple interfaces.

y Interfaces are better in situations in which you do not need to inherit implementationfrom a base class.

y Interfaces are useful in cases where you cannot use class inheritance. For example,structures cannot inherit from classes, but they can implement interfaces.

How to diplay alert on post back from javascript

string strScript = "";

if ((!Page.IsStartupScriptRegistered("clientScript")))

{


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Page.RegisterStartupScript("clientScript", strScript);

}In ADO.NET a metadata is created what information it

contains

Metadata collections contains information about items whose schema can be retrieved. These

collections are as follows:

Tables : Provides information of tables in database

Views : Provides information of views in the database

Columns : Provides information about column in tables

ViewColumns : Provides information about views created for columns

Procedures : Provides information about stored procedures in database

ProcedureParame ters : Provides information about stored procedure parameters

Indexes : Provides information about indexes in database

IndexColumns : Provides information about columns of the indexes in database

DataTypes : Provides information about datatypes

Users : Provides information about database users

What is Managed Heap

The .NET framework includes a managed heap that all .NET languages use when allocating

reference type objects. Lightweight objects known as value types are always allocated on the

stack, but all instances of classes and arrays are created from a pool of memory known as the

managed heap.

What is the managed and unmanaged code in .net

The .NET Framework provides a run-time environment called the Common Language

Runtime,which manages the execution of code and provides services that make the development

process easier. Compilers and tools expose the runtime's functionality and enable you to write

code that benefits from this managed execution environment. Code that you develop with a


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language compiler that targets the runtime is called managed code; it benefits from features such

as cross-language integration, cross-language exception handling,enhanced security, versioning

and deployment support, a simplified model for component interaction, and debugging and

profiling services

What is Machine.config File

As web.config file is used to configure one asp .net web application, same way Machine.config

file is used to configure application according to a particular machine. That is, configuration

done in machine.config file is affected on any application that runs on a particular machine.

Usually, this file is not altered and only web.config is used which configuring applications.

What is a LiveLock

A livelock is one, where a request for an exclusive lock is repeatedly denied because a series of

overlapping shared locks keeps interfering. SQL Server detects the situation after four denials

and refuses further shared locks. A livelock also occurs when read transactions monopolize a

table or page, forcing a write transaction to wait indefinitely.

What are the ASP.NET List Control

ASP.NET List controls ==> There are 3 . 1. DropDownList, 2. ListBox and 3.HTMLSelect.

1. System.Web.UI.WebControls. DropDownList this control renders a drop-down list in the page

at runtime. Only the selected item is visible when the user is not interacting with the list, and the

other items become visible when the user clicks the control to see items that can be selected.Only one item can be selected in this control. This control must be inserd into a server side form

(runat="server") applied. 2. System.Web.UI.WebControls.ListBoxthis control renders a list ofitems within a scrolling box, multiple items can be selected in this control if required. This

control must be inserted into a server side form (runat="server") applied.

3. System.Web.UI.HTMLControls.HTMLSelectthis control can be used to render a drop-down

list or a scrolling list of items. This control has less built in functionality when compared withcontrols above (It lacks many of the properties that can be used to influence the display style

such as ForeColor and BackColor to name a couple),but it is still capable of performing mostcommon uses of a list control. This control can be inserted anywhere, and does not require a

server side form.


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What is LDAP

LDAP is a networking protocol for querying and modifying directory services running overTCP/IP.To explain LDAP we take a example of telephone directory, which consists of a series of

names organized alphabetically, with an address and phone number attached.To start LDAP on

client it should be connect with server at TCP/IP port 389.The client can send multiple request tothe server.The basic operations are:-

Start TLS - protect the connection with T

ransport Layer Security (TLS), to have a more secure connection Bind - authenticate and specify

LDAP protocol version

Search - search for and/or retrieve directory entries

Compare - test if a named entry contains a given attribute value

Add a new entry

Delete an entry

Modify an entry

Modify DN - move or rename an entry

Abandon - abort a previous request

Extended Operation - generic operation used to define other operations

Unbind - close the connection (not the inverse of Bind)

How does a 3tier architecture work

There r three Layers:-

The GUI layer

The GUI is the "top layer".It contains all things that are visible to user, the 'outside' of thesystem, such as screen layout and navigation. The GUI layer has techniques like HTML, CSS,Applet, Servlet, JSP, JHTML.

The Object layer

This is the core of the system, the linking pin between the other layers. The object layer hasknowledge, in two different ways: runtime values, like the custome r name "Oxford &


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Associates" or the invoice number "OAA2000w36".Structural knowledge, about data andprocessing.

Data example

A customer can receive many invoices, and an invoice always goes to just one customer. Procesexample :- Know who does what. Every objects knows his own methods, and those of hisneighbours. In a pure OO model an object talks to his neighbours, and nobody but his

neighbours. In the object layer you'll find things like Classes,objects, instance variables, vectors,primitives, methods, polymorphism, encapsulation and inheritance. The objects mostly have a

temporary nature. They "live" just in memory for the duration of a transaction or session.

Database Layer

The database layer takes care of persistency. An object from the object layer can write itself to

one or more tables. In the database layer you'll find things like database, connection, table, SQL

and result set.

What do you mean by Late Binding

In LateBinding compiler not have any knowledge about COM's methods and properties and it

get at runtime. Actually program learns the addresses of methods and properties at execution

time.When those methods and properties are invoked. Late bound code typically refers client

objects through generic data types like 'object' and relies heavily on runtime to dynamically

locate method addresses. We do late binding in C# through reflection. Reflection is a way to

determine the type or information about the classes or interfaces.

what is a jitter and how many types of jitters are there

JIT is just in time complier.it categorized into three:-

1 Standard JIT : prefered in webApp-----on diamand

2 Pre JIT : only one time------only use for window App

3 Economic JIT : use in mobile App

What are the different IIS level

There are mainly three level of ISS these are as follows.

(1)Low


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(2)Medium

(3)High

(1)Low(IIS Process):-In this all the main process of IIS and ASP.NET application runs in the

same process . But here is some disadvantage of this if one of process is failed whole the processfailed.Its required low resources as compare to other.

(2)Medium(Pooled):-In this IIS process and application runs in different process.Let there are

two proces

s process1 and process2 then in process one IIS process is running and in process2 application isrun.

(3)High(Isolated):-In this all the process running in there own process. One process for one

application.But it is one costly things because too much memory needed for this.

What is Isolation Level

An isolation level determines the degree of isolation of data between concurrent transactions.

The default SQL Server isolation level is Read Committed. A lower isolation level increasesconcurrency, but at the expense of data correctness. Conversely, a higher isolation level ensures

that data is correct, but can affect concurrency negatively. The isolation level required by anapplication determines the locking behavior SQL Server uses. SQL-92 defines the followingisolation levels, all of which are supported by SQL Server:

Read uncommitted (the lowest level where transactions are isolated only enough to ensure that

physically corrupt data is not read).

Read committed (SQL Server default level).

Repeatable read.

Serializable (the highest level, where transactions are completely isolated from one another).

What are the constraintsTable Constraints define rules regarding the values allowed in columns and are the standard

mechanism for enforcing integrity.SQL Server 2000 supports five classes of constraints. NOT

NULL,CHECK, UNIQUE, PRIMARY KEY, FOREIGN KEY.

Isolation levels in SQL SERVER


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Isolation level get the condition to which data is isolated for use by one process and securedagainst interference from other processes.

Read Committed -

SQL Server applied a share lock while reading a row into a cursor but frees the lock immediatelyafter reading the row. Because a shared lock request is blocked by an exclusive lock, a cursor isprevented from reading a row that another task has updated but not yet committed. Read commi

tted is the default isolation level setting for both SQL Server and ODBC.

Read Uncommitted -

When no locks while reading a row into a cursor and honors no exclusive locks. Cursors can be

populated with values that have already been updated but not yet committed. The user isbypassing all of SQL Servers locking transaction control mechanisms.

Repeatable Read or Serializable -

SQL Server requests a shared lock on each row as it is read into the cursor as in READ

COMMITTED, but if the cursor is opened within a transaction, the shared locks are held until

the end of the transaction instead of being freed after the row is read. This has the same effect as

specifying HOLDLOCK on a SELECT statement.

Can You explain the syntax of ISNULL in SQL SERVER

Returns a Boolean value that indicates whether

an expression contains no valid data we can alsouse this as conditional operator and also as if

else loop.

syntax:-

isNull("dotnet","SQL")

if condition is true then its return dotnet

if not then SQL

How to get the hostname or IP address of the server

Diffrence between instance and object and Abstract class


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instance means just creating a reference(copy) .

object :means when memory location is associated with the object( is a runtime entity of the

class) by using the new operator

interface is a set of abstract methods, all of which have to be overriden by the class whicheverimplements the interface

abstract class is a collection of data and methods which are abstact (not all of them)

What are the valid parameter types we can pass in an

Indexer

IN,OUT,INOUT are the valid parameter types that we can pass in a Indexer.

What does the term immutable mean

It means to create a view of data that is not modifiable and is temporary of data that is

modifiable.Immutable means you can't change the currrent data,but if you perform someoperation on that data, a new copy is created. The operation doesn't change the data itself. Like

let's say you have a string object having "hello" value. Now if you say

temp = temp + "new value"

a new object is created, and values is saved in that. The temp object is im mutable, and can't be

changed. An object qualifies as being called immutable if its value cannot be modified once it

has been created. For example, methods that appear to modify a String actually return a new

String containing the modification. Developers are modifying strings all the time in their code.

This may appear to the developer as mutable - but it is not. What actually happens is your string

variable/object has been changed to reference a new string value containing the results of your

new string value. For this very reason .NET has the System.Text.StringBuilder class. If you find

it necessary to modify the actual contents of a string-like object heavily, such as in a for or

foreach loop, use the System.Text.StringBuilder class.

How to display hyperlink without underline

A:link { text-decoration: none } ----- for normal, unvisited links, no underline;

A:active { text-decoration: none } --- active is for link appearance while you're clicking

A:visited { text-decoration: none } --- visited is for previously visited links


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what is Hot Backup

An online backup or hot backup is also referred to as ARCHIVE LOG backup. An online backup can only

be done when the database is running in ARCHIVELOG mode and the database is open. When the

database is running in ARCHIVELOG mode, the archiver (ARCH) background process will make a copy of

the online redo log file to archive backup location.

How frame helps to get client data

Here is the syntax of frame:-

here is syntax only first frame is display and left two are hidden.With the help of frame we can

get data of more then one field.

Date post:	10-Apr-2018
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