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									1. When was ASP.NET released?

      ASP.NET is a part of the .NET framework which was released as a software platform
   in 2002.

2. Is a new version coming up?

   ASP.NET 2.0, Visual Studio 2005 (Whidbey), Visual Web Developer 2005 Express
   Edition are the next releases of Microsoft's Web platform and tools. They have already
   been released as Beta versions. They are scheduled to be released in the week of
   November 7, 2005.

3. Explain Namespace.

   Namespaces are logical groupings of names used within a program. There may be
   multiple namespaces in a single application code, grouped based on the identifiers’ use.
   The name of any given identifier must appear only once in its namespace.

4. List the types of Authentication supported by ASP.NET.

                1) Windows (default), 2) Forms, 3) Passport, 4) None (Security disabled)

5. What is CLR?

   Common Language Runtime (CLR) is a run-time environment that manages the
   execution of .NET code and provides services like memory management, debugging,
   security, etc. The CLR is also known as Virtual Execution System (VES).

6. What is CLI?

   The CLI is a set of specifications for a runtime environment, including a common type
   system, base class library, and a machine-independent intermediate code known as the
   Common Intermediate Language (CIL).

   List the various stages of Page-Load lifecycle.

                  1) Init (), 2) Load (), 3) PreRender() 4) Unload()

7. Explain Assembly and Manifest.

   An assembly is a collection of one or more files and one of them (DLL or EXE) contains
   a special metadata called Assembly Manifest. The manifest is stored as binary data and
   contains details like versioning requirements for the assembly, the author, security
   permissions, and list of files forming the assembly. An assembly is created whenever a
   DLL is built. The manifest can be viewed programmatically by making use of classes
   from the System.Reflection namespace. The tool Intermediate Language Disassembler
   (ILDASM) can be used for this purpose. It can be launched from the command prompt or
   via Start> Run.
8. What is Shadow Copy?

   In order to replace a COM component on a live web server, it was necessary to stop the
   entire website, copy the new files and then restart the website. This is not feasible for the
   web servers that need to be always running. .NET components are different. They can be
   overwritten at any time using a mechanism called Shadow Copy. It prevents the Portable
   Executable (PE) files like DLLs and EXEs from being locked. Whenever new versions of
   the PEs are released, they are automatically detected by the CLR and the changed
   components will be automatically loaded. They will be used to process all new requests
   not currently executing, while the older version still runs the currently executing requests.
   By bleeding out the older version, the update is completed.

9. What is DLL Hell?

   DLL hell is the problem that occurs when an installation of a newer application might
   break or hinder other applications as newer DLLs are copied into the system and the
   older applications do not support or are not compatible with them. .NET overcomes this
   problem by supporting multiple versions of an assembly at any given time. This is also
   called side-by-side component versioning.

10. Explain Web Services.

   Web services are programmable business logic components that provide access to
   functionality through the Internet. Standard protocols like HTTP can be used to access
   them. Web services are based on the Simple Object Access Protocol (SOAP), which is an
   application of XML. Web services are given the .asmx extension.

11. Explain Windows Forms.

   Windows Forms is employed for developing Windows GUI applications. It is a class
   library that gives developers access to Windows Common Controls with rich
   functionality. It is a common GUI library for all the languages supported by the .NET

12. What is Post back?

   When an action occurs (like button click), the page containing all the controls within the
   <FORM... > tag performs an HTTP POST, while having itself as the target URL. This is
   called Post back.

13. Explain the differences between server-side and client-side code?

   Server side scripting means that all the script will be executed by the server and
   interpreted as needed. Client side scripting means that the script will be executed
   immediately in the browser such as form field validation, clock, email validation, etc.
   Client side scripting is usually done in VBScript or JavaScript. Since the code is included
   in the HTML page, anyone can see the code by viewing the page source. It also poses as
   a possible security hazard for the client computer.
14. Enumerate the types of Directives.

1) Page directive ,2) Import directive ,3) Implements directive ,4) Register directive ,5)
   Assembly directive

   6) Output Cache directive 7) Reference directive

15. What is Code-Behind?

   Code-Behind is a concept where the contents of a page are in one file and the server-side
   code is in another. This allows different people to work on the same page at the same
   time and also allows either part of the page to be easily redesigned, with no changes
   required in the other. An Inherits attribute is added to the @ Page directive to specify the
   location of the Code-Behind file to the ASP.NET page.

16. Describe the difference between inline and code behind.

   Inline code is written along side the HTML in a page. There is no separate distinction
   between design code and logic code. Code-behind is code written in a separate file and
   referenced by the .aspx page.

17. List the ASP.NET validation controls?

   1)RequiredFieldValidator 2)RangeValidator 3)CompareValidator

   5)CustomValidator 6)ValidationSummary

18. What is Data Binding?

   Data binding is a way used to connect values from a collection of data (e.g. DataSet) to
   the controls on a web form. The values from the dataset are automatically displayed in
   the controls without having to write separate code to display them.

19. Describe Paging in ASP.NET.

   The DataGrid control in ASP.NET enables easy paging of the data. The AllowPaging
   property of the DataGrid can be set to True to perform paging. ASP.NET automatically
   performs paging and provides the hyperlinks to the other pages in different styles, based
   on the property that has been set for PagerStyle.Mode.

20. Should user input data validation occur server-side or client-side? Why?

   All user input data validation should occur on the server and minimally on the client-side,
   though it is a good way to reduce server load and network traffic because we can ensure
   that only data of the appropriate type is submitted from the form. It is totally insecure.
   The user can view the code used for validation and create a workaround for it. Secondly,
   the URL of the page that handles the data is freely visible in the original form page. This
    will allow unscrupulous users to send data from their own forms to your application.
    Client-side validation can sometimes be performed where deemed appropriate and
    feasible to provide a richer, more responsive experience for the user.

21. What is the difference between Server.Transfer and Response.Redirect?

o   Response.Redirect: This tells the browser that the requested page can be found at a new
    location. The browser then initiates another request to the new page loading its contents
    in the browser. This results in two requests by the browser.

o   Server.Transfer: It transfers execution from the first page to the second page on the
    server. As far as the browser client is concerned, it made one request and the initial page
    is the one responding with content. The benefit of this approach is one less round trip to
    the server from the client browser. Also, any posted form variables and query string
    parameters are available to the second page as well.

22. What is an interface and what is an abstract class?

    In an interface, all methods must be abstract (must not be defined). In an abstract class,
    some methods can be defined. In an interface, no accessibility modifiers are allowed,
    whereas it is allowed in abstract classes.

23. 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.

24. Can two different programming languages be mixed in a single ASPX file?

    ASP.NET’s built-in parsers are used to remove code from ASPX files and create
    temporary files. Each parser understands only one language. Therefore mixing of
    languages in a single ASPX file is not possible.

25. Is it possible to see the code that ASP.NET generates from an ASPX file?

    By enabling debugging using a <%@ Page Debug="true" %> directive in the ASPX file
    or a <compilation debug="true"> statement in Web.config, the generated code can be
   viewed. The code is stored in a CS or VB file (usually in the
   \%SystemRoot%\Microsoft.NET\Framework\v1.0.nnnn\Temporary ASP.NET Files).

26. Can a custom .NET data type be used in a Web form?

   This can be achieved by placing the DLL containing the custom data type in the
   application root's bin directory and ASP.NET will automatically load the DLL when the
   type is referenced.

27. List the event handlers that can be included in Global.asax?

   1)Application start and end event handlers 2)Session start and end event handlers 3)Per-
   request event handlers

   4)Non-deterministic event handlers

28. Can the view state be protected from tampering?

   This can be achieved by including an @ Page directive with an
   EnableViewStateMac="true" attribute in each ASPX file that has to be protected.
   Another way is to include the <pages enableViewStateMac="true" /> statement in the
   Web.config file.

29. Can the view state be encrypted?

   The view state can be encrypted by setting EnableViewStateMac to true and either
   modifying the <machineKey> element in Machine.config to <machineKey
   validation="3DES” /> or by adding the above statement to Web.config.

30. When during the page processing cycle is ViewState available?

   The view state is available after the Init() and before the Render() methods are called
   during Page load.

31. Do Web controls support Cascading Style Sheets?

   All Web controls inherit a property named CssClass from the base class
   System.Web.UI.WebControls.WebControl which can be used to control the properties of
   the web control.

32. What classes are needed to send e-mail from an ASP.NET application?

   The classes MailMessage and SmtpMail have to be used to send email from an ASP.NET
   application. MailMessage and SmtpMail are classes defined in the .NET Framework
   Class Library's System.Web.Mail namespace.
33. Why do some web service classes derive from System.Web.WebServices while others do

   Those Web Service classes which employ objects like Application, Session, Context,
   Server, and User have to derive from System.Web.WebServices. If it does not use these
   objects, it is not necessary to be derived from it.

34. What are VSDISCO files?

   VSDISCO files are DISCO files that enable dynamic discovery of Web Services.
   ASP.NET links the VSDISCO to a HTTP handler that scans the host directory and
   subdirectories for ASMX and DISCO files and returns a dynamically generated DISCO
   document. A client who requests a VSDISCO file gets back what appears to be a static
   DISCO document.

35. How can files be uploaded to Web pages in ASP.NET?

   This can be done by using the HtmlInputFile class to declare an instance of an <input
   type="file" runat="server"/> tag. Then, a byte[] can be declared to read in the data from
   the input file. This can then be sent to the server.

36. How do I create an ASPX page that periodically refreshes itself?

   The following META tag can be used as a trigger to automatically refresh the page every
   n seconds:

   <meta http-equiv="Refresh" content="nn">
37. How do I initialize a TextBox whose TextMode is "password", with a password?

   The TextBox’s Text property cannot be used to assign a value to a password field.
   Instead, its Value field can be used for that purpose.

   <asp:TextBox Value="imbatman" TextMode="Password"
               ID="Password" RunAt="server" />
38. Why does the control's PostedFile property always show null when using HtmlInputFile
    control to upload files to a Web server?

   This occurs when an enctype="multipart/form-data" attribute is missing in the <form>

39. How can the focus be set to a specific control when a Web form loads?

   This can be achieved by using client-side script:

   document.forms[0].TextBox1.focus ()
   The above code will set the focus to a TextBox named TextBox1 when the page loads.
40. How does System.Web.UI.Page's IsPostBack property work?

   IsPostBack checks to see whether the HTTP request is accompanied by postback data
   containing a __VIEWSTATE or __EVENTTARGET parameter. If there are none, then it
   is not a postback.

41. What is WSDL?

   WSDL is an XML format for describing network services as a set of endpoints operating
   on messages containing either document-oriented or procedure-oriented information. The
   operations and messages are described abstractly, and then bound to a concrete network
   protocol and message format to define an endpoint. Related concrete endpoints are
   combined into abstract endpoints (services). (Source:

42. What is UDDI?

   UDDI stands for Universal Description, Discovery, and Integration. It is like an "Yellow
   Pages" for Web Services. It is maintained by Microsoft, IBM, and Ariba, and is designed
   to provide detailed information regarding registered Web Services for all vendors. The
   UDDI can be queried for specific Web Services.

43. Is it possible to generate the source code for an ASP.NET Web service from a WSDL?

   The Wsdl.exe tool (.NET Framework SDK) can be used to generate source code for an
   ASP.NET web service with its WSDL link.

   Example: wsdl /server

44. Why do uploads fail while using an ASP.NET file upload control to upload large files?

   ASP.NET limits the size of file uploads for security purposes. The default size is 4 MB.
   This can be changed by modifying the maxRequestLength attribute of Machine.config's
   <httpRuntime> element.

45. Describe the difference between inline and code behind.

   Inline code is written along side the HTML in a page. Code-behind is code written in a
   separate file and referenced by the .aspx page.

51. Describe the role of inetinfo.exe, aspnet_isapi.dll andaspnet_wp.exe in the page loading

   inetinfo.exe is theMicrosoft IIS server running, handling ASP.NET requests among other
   things.When an ASP.NET request is received (usually a file with .aspx extension), the
   ISAPI filter aspnet_isapi.dll takes care of it by passing the request tothe actual worker
   process aspnet_wp.exe.

52. Can you explain the difference between an ADO.NET Dataset and an ADO Recordset?
•   Valid answers are:

o A DataSet can represent an entire relational database in memory, complete with tables,
  relations, and views.

o A DataSet is designed to work without any continuing connection to the original data

o Data in a DataSet is bulk-loaded, rather than being loaded on demand.

o There's no concept of cursor types in a DataSet.

o DataSets have no current record pointer You can use For Each loops to move through the

o You can store many edits in a DataSet, and write them to the original data source in a
  single operation.

o Though the DataSet is universal, other objects in ADO.NET come in different versions
  for different data sources.

53. What’s a bubbled event?

    When you have a complex control, like DataGrid, writing an event processing routine for
    each object (cell, button, row, etc.) is quite tedious. The controls can bubble up their
    eventhandlers, allowing the main DataGrid event handler to take care of its constituents.

54. What data types do the RangeValidator control support?

    Integer, String, and Date.

55. Explain what a diffgram is, and a good use for one?

    The DiffGram is one of the two XML formats that you can use to render DataSet object
    contents to XML. A good use is reading database data to an XML file to be sent to a Web

56. What is the transport protocol you use to call a Web service?

    SOAP (Simple Object Access Protocol) is the preferred protocol.

57. What is ViewState?

    ViewState allows the state of objects (serializable) to be stored in a hidden field on the
    page. ViewState is transported to the client and back to the server, and is not stored on
   the server or any other external source. ViewState is used the retain the state of server-
   side objects between postabacks.

58. What does the "EnableViewState" property do? Why would I want it on or off?

   It allows the page to save the users input on a form across postbacks. It saves the server-
   side values for a given control into ViewState, which is stored as a hidden value on the
   page before sending the page to the clients browser. When the page is posted back to the
   server the server control is recreated with the state stored in viewstate.

59. What are the different types of Session state management options available with

   ASP.NET provides In-Process and Out-of-Process state management. In-Process stores
   the session in memory on the web server. This requires the a "sticky-server" (or no load-
   balancing) so that the user is always reconnected to the same web server. Out-of-Process
   Session state management stores data in an external data source. The external data source
   may be either a SQL Server or a State Server service. Out-of-Process state management
   requires that all objects stored in session are serializable.

60. Differences Between XML and HTML?

   Anyone with a fundamental grasp of XML should be able describe some of the main
   differences outlined in the table below

          XML                               HTML
          User definable tags               Defined set of tags designed for
                                            web display
          Content driven                    Format driven
          End tags required for well formed End tags not required
          Quotes required around attributes Quotes not required
          Slash required in empty tags      Slash not required
61. Give a few examples of types of applications that can benefit from using XML.

   There are literally thousands of applications that can benefit from XML technologies.
   The point of this question is not to have the candidate rattle off a laundry list of projects
   that they have worked on, but, rather, to allow the candidate to explain the rationale for
   choosing XML by citing a few real world examples. For instance, one appropriate answer
   is that XML allows content management systems to store documents independently of
   their format, which thereby reduces data redundancy. Another answer relates to B2B
   exchanges or supply chain management systems. In these instances, XML provides a
   mechanism for multiple companies to exchange data according to an agreed upon set of
   rules. A third common response involves wireless applications that require WML to
   render data on hand held devices.
62. What is DOM and how does it relate to XML?

   The Document Object Model (DOM) is an interface specification maintained by the W3C
   DOM Workgroup that defines an application independent mechanism to access, parse, or
   update XML data. In simple terms it is a hierarchical model that allows developers to
   manipulate XML documents easily Any developer that has worked extensively with
   XML should be able to discuss the concept and use of DOM objects freely. Additionally,
   it is not unreasonable to expect advanced candidates to thoroughly understand its internal
   workings and be able to explain how DOM differs from an event-based interface like

63. What is SOAP and how does it relate to XML?

   The Simple Object Access Protocol (SOAP) uses XML to define a protocol for the
   exchange of information in distributed computing environments. SOAP consists of three
   components: an envelope, a set of encoding rules, and a convention for representing
   remote procedure calls. Unless experience with SOAP is a direct requirement for the
   open position, knowing the specifics of the protocol, or how it can be used in conjunction
   with HTTP, is not as important as identifying it as a natural application of XML.

64. Can you walk us through the steps necessary to parse XML documents?

   Superficially, this is a fairly basic question. However, the point is not to determine
   whether candidates understand the concept of a parser but rather have them walk through
   the process of parsing XML documents step-by-step. Determining whether a non-
   validating or validating parser is needed, choosing the appropriate parser, and handling
   errors are all important aspects to this process that should be included in the candidate's

65. What are possible implementations of distributed applications in .NET?

   .NET Remoting and ASP.NET Web Services. If we talk about the Framework Class
   Library, noteworthy classes are in System.Runtime.Remoting and System.Web.Services.

66. What are the consideration in deciding to use .NET Remoting or ASP.NET Web

   Remoting is a more efficient communication exchange when you can control both ends
   of the application involved in the communication process. Web Services provide an
   open-protocol-based exchange of informaion. Web Services are best when you need to
   communicate with an external organization or another (non-.NET) technology.

67. What’s a proxy of the server object in .NET Remoting?

   It’s a fake copy of the server object that resides on the client side and behaves as if it was
   the server. It handles the communication between real server object and the client object.
   This process is also known as marshaling.
68. What are remotable objects in .NET Remoting?

   Remotable objects are the objects that can be marshaled across the application domains.
   You can marshal by value, where a deep copy of the object is created and then passed to
   the receiver. You can also marshal by reference, where just a reference to an existing
   object is passed.

69. What are channels in .NET Remoting?

   Channels represent the objects that transfer the other serialized objects from one
   application domain to another and from one computer to another, as well as one process
   to another on the same box. A channel must exist before an object can be transferred.

70. What security measures exist for .NET Remoting in System.Runtime.Remoting?

   None. Security should be taken care of at the application level. Cryptography and other
   security techniques can be applied at application or server level.

71. What is a formatter?

   A formatter is an object that is responsible for encoding and serializing data into
   messages on one end, and deserializing and decoding messages into data on the other

72. Choosing between HTTP and TCP for protocols and Binary and SOAP for formatters,
    what are the trade-offs?

   Binary over TCP is the most effiecient, SOAP over HTTP is the most interoperable.

73. What’s SingleCall activation mode used for?

   If the server object is instantiated for responding to just one single request, the request
   should be made in SingleCall mode.

74. What’s Singleton activation mode?

   A single object is instantiated regardless of the number of clients accessing it. Lifetime of
   this object is determined by lifetime lease.

75. How do you define the lease of the object?

   By implementing ILease interface when writing the class code.

76. Can you configure a .NET Remoting object via XML file?

   Yes, via machine.config and application level .config file (or web.config in ASP.NET).
   Application-level XML settings take precedence over machine.config.
77. How can you automatically generate interface for the remotable object in .NET with
    Microsoft tools?

   Use the Soapsuds tool.


   Create Query:
   create table country_master(id numeric,countryname varchar(40))

   Create Insert Query:
   create procedure Insert_into_country(@Insert_ID varchar(10), @Insert_Name
   varchar(20)) as insert into country_master(id, countryname) values (@Insert_ID,

   Create Update Query:
   create procedure update_into_country(@Update_ID varchar(10), @Update_Name
   varchar(20)) as update country_master set id=@Update_ID,
   countryname=@Update_Name where id=@Update_ID

   Create Delete Query:
   create procedure Delete_country(@Delete_ID varchar(10)) as delete from
   country_master where id=@Delete_ID

   Create Select Query:
   create procedure view_country as select * from country_master
   create procedure display_country as select countryname from country_master


             cmd = New OleDbCommand
             cmd.Connection = con
          cmd.CommandType = CommandType.StoredProcedure
          cmd.CommandText = "Insert_into_country"
          cmd.Parameters.Add("@Insert_ID", TextBox1.Text)
          cmd.Parameters.Add(" @Insert_Name", TextBox2.Text)


          cmd = New OleDbCommand
          cmd.Connection = con
          cmd.CommandType = CommandType.StoredProcedure
          cmd.CommandText = "update_into_country"
          cmd.Parameters.Add("@Update_ID", TextBox1.Text)
          cmd.Parameters.Add("@Update_Name", TextBox2.Text)


          cmd = New OleDbCommand
          cmd.Connection = con
          cmd.CommandType = CommandType.StoredProcedure
          cmd.CommandText = "Delete_country"
          cmd.Parameters.Add("@Delete_ID", TextBox1.Text)

Display in datagrid:

          cmd.Connection = con
          Dim adap As New OleDbDataAdapter
          Dim ds As New DataSet
          cmd.CommandType = CommandType.StoredProcedure
          cmd.CommandText = "view_country"
          adap.SelectCommand = cmd
          DataGrid1.DataSource = ds

Display in Countryname in combobox:

    Sub display_combo()
        cmd.Connection = con
        Dim adap As New OleDbDataAdapter
        Dim ds As New DataSet
        cmd.CommandType = CommandType.StoredProcedure
        cmd.CommandText = "display_country"
        adap.SelectCommand = cmd
        adap.Fill(ds, "country_master")
        ComboBox1.DataSource = ds.Tables("country_master")
            ComboBox1.ValueMember = "countryname"
        End Sub 2.0
1. What are the new Data Controls in 2.0?

   Data access in ASP.NET 2.0 can be accomplished completely declaratively (no code)
   using the new data-bound and data source controls. There are new data source controls to
   represent different data backends such as SQL database, business objects, and XML, and
   there are new data-bound controls for rendering common UI for data, such as gridview,
   detailsview, and formview.

2. What are the new Navigation Controls in 2.0?

   The navigation controls provide common UI for navigating between pages in your site,
   such as treeview, menu, and sitemappath. These controls use the site navigation service in
   ASP.NET 2.0 to retrieve the custom structure you have defined for your site.

3. What are the new Login Controlsin 2.0?

   The new login controls provide the building blocks to add authentication and
   authorization-based UI to your site, such as login forms, create user forms, password
   retrieval, and custom UI for logged in users or roles. These controls use the built-in
   membership and role services in ASP.NET 2.0 to interact with the user and role
   information defined for your site.

4. What are the new Web Part Controls in 2.0 ?

   Web parts are an exciting new family of controls that enable you to add rich, personalized
   content and layout to your site, as well as the ability to edit that content and layout
   directly from your application pages. These controls rely on the personalization services
   in ASP.NET 2.0 to provide a unique experience for each user in your application.

5. What are Master Pages?

   This feature provides the ability to define common structure and interface elements for
   your site, such as a page header, footer, or navigation bar, in a common location called a
   "master page", to be shared by many pages in your site. In one simple place you can
   control the look, feel, and much of functionality for an entire Web site. This improves the
   maintainability of your site and avoids unnecessary duplication of code for shared site
   structure or behavior.

6. What are Themes and Skins in 2.0, explain usgae scenario?

   The themes and skins features in ASP.NET 2.0 allow for easy customization of your
   site's look-and-feel. You can define style information in a common location called a
   "theme", and apply that style information globally to pages or controls in your site. Like
   Master Pages, this improves the maintainability of your site and avoid unnecessary
   duplication of code for shared styles.
7. What is a profile object, why is it used?

   Using the new personalization services in ASP.NET 2.0 you can easily create customized
   experiences within Web applications. The Profile object enables developers to easily
   build strongly-typed, sticky data stores for user accounts and build highly customized,
   relationship based experiences. At the same time, a developer can leverage Web Parts
   and the personalization service to enable Web site visitors to completely control the
   layout and behavior of the site, with the knowledge that the site is completely customized
   for them. Personalizaton scenarios are now easier to build than ever before and require
   significantly less code and effort to implement.

8. What is Configuration API?

   ASP.NET 2.0 contains new configuration management APIs, enabling users to
   programmatically build programs or scripts that create, read, and update Web.config and
   machine.config configuration files.

9. What is MMC Admin Tool?

   ASP.NET 2.0 provides a new comprehensive admin tool that plugs into the existing IIS
   Administration MMC, enabling an administrator to graphically read or change common
   settings within our XML configuration files.

10. Explain the use of Pre-compilation Tool?

   ASP.NET 2.0 delivers a new application deployment utility that enables both developers
   and administrators to precompile a dynamic ASP.NET application prior to deployment.
   This precompilation automatically identifies any compilation issues anywhere within the
   site, as well as enables ASP.NET applications to be deployed without any source being
   stored on the server (one can optionally remove the content of .aspx files as part of the
   compile phase), further protecting your intellectual property.

11. How is application management and maintenance improved in 2.0?

   ASP.NET 2.0 also provides new health-monitoring support to enable administrators to be
   automatically notified when an application on a server starts to experience problems.
   New tracing features will enable administrators to capture run-time and request data from
   a production server to better diagnose issues. ASP.NET 2.0 is delivering features that will
   enable developers and administrators to simplify the day-to-day management and
   maintenance of their Web applications.

12. What are Provider-driven Application Services? explain in detail?
    ASP.NET 2.0 now includes built-in support for membership (user name/password
    credential storage) and role management services out of the box. The new personalization
    service enables quick storage/retrieval of user settings and preferences, facilitating rich
    customization with minimal code. The new site navigation system enables developers to
    quickly build link structures consistently across a site. As all of these services are
    provider-driven, they can be easily swapped out and replaced with your own custom
   implementation. With this extensibility option, you have complete control over the data
   store and schema that drives these rich application services.

13. Explain Server Control Extensibility with reference to 2.0 ?
    ASP.NET 2.0 includes improved support for control extensibility, such as more base
    classes that encapsulate common behaviors, improved designer support, more APIs for
    interacting with client-side script, metadata-driven support for new features like themes
    and accessibility verification, better state management, and more.

14. What are the Data Source Controls?
    Data access in ASP.NET 2.0 is now performed declaratively using data source controls
    on a page. In this model, support for new data backend storage providers can be easily
    added by implementing custom data source controls. Additionally, the SqlDataSource
    control that ships in the box has built-in support for any ADO.NET managed provider
    that implements the new provider factory model in ADO.NET.

15. What are Compilation Build Providers?
    Dynamic compilation in ASP.NET 2.0 is now handled by extensible compilation build
    providers, which associate a particular file extension with a handler that knows how to
    compile that extension dynamically at runtime. For example, .resx files can be
    dynamically compiled to resources, .wsdl files to web service proxies, and .xsd files to
    typed DataSet objects. In addition to the built-in support, it is easy to add support for
    additional extensions by implementing a custom build provider and registering it in

16. What is Expression Builders, why would you use it?
    ASP.NET 2.0 introduces a declarative new syntax for referencing code to substitute
    values into the page, called Expression Builders. ASP.NET 2.0 includes expression
    builders for referencing string resources for localization, connection strings, application
    settings, and profile values. You can also write your own expression builders to create
    your own custom syntax to substitute values in a page rendering.

17. Is ASP.NET 64-Bit enabled? how?
    ASP.NET 2.0 is now 64-bit enabled, meaning it can take advantage of the full memory
    address space of new 64-bit processors and servers. Developers can simply copy existing
    32-bit ASP.NET applications onto a 64-bit ASP.NET 2.0 server and have them
    automatically be JIT compiled and executed as native 64-bit applications (no source code
    changes or manual re-compile are required).

18. Explain how Caching in 2.0 is different from Caching in 1.1?
    ASP.NET 2.0 also now includes automatic database server cache invalidation. This
    powerful and easy-to-use feature allows developers to aggressively output cache
    database-driven page and partial page content within a site and have ASP.NET
    automatically invalidate these cache entries and refresh the content whenever the back-
    end database changes. Developers can now safely cache time-critical content for long
    periods without worrying about serving visitors stale data.
     Java script interview question

1. what is the differene between java and java script...?

     Java Script is object based language it is used for front end validations
     java is object oriented language object oriented language supports OOP's Object based
     not suppoted inheritence.

2. What are JavaScript types?

     Number, String, Boolean, Function, Object, Null, Undefined.

3. How do you convert numbers between different bases in JavaScript?

     Use the parseInt() function, that takes a string as the first parameter, and the base as a
     second parameter. So to convert hexadecimal 3F to decimal, use parseInt ("3F", 16);

4. What does isNaN function do ?

     Return true if the argument is not a number.

5. What is negative infinity?

     It’s a number in JavaScript, derived by dividing negative number by zero.

6. What boolean operators does JavaScript support?

     &&, || and !

7.         What does "1"+2+4 evaluate to?

     Since 1 is a string, everything is a string, so the result is 124.

8. What looping structures are there in JavaScript?

     for, while, do-while loops, but no foreach.

9. How do you create a new object in JavaScript?

     var obj = new Object(); or var obj = {};

10. How do you assign object properties?

     obj["age"] = 17 or obj.age = 17

11. What’s a way to append a value to an array?

     arr[arr.length] = value;
12. What is this keyword?

   It refers to the current object.

13. What is the main difference between Client side JavaScript and and Server side Java
    Script. How actually they run on both side with Example?

   Clientside Javascript encompasses the core language plus extras such as the predefined
   objects, only relevant to running Javasript in a browser.The clientside javascript is
   embedded directly in the HTML pages and is interpreted by the browser completly at the
   run time. Serverside javascript also encompasses the core language plus extas as the
   predefined objects and functions only relevant to running Javasript in a server.The
   serverside javascripts are compiled before they are deployed

   1.1 Do I need IIS to run Web applications?

   If you are using Visual Studio, you can use the ASP.NET Development Server built into Visual
   Studio to test your pages. The server functions as a local Web server, running ASP.NET Web
   pages in a manner virtually identical to how they run in IIS. To deploy a Web application, you
   need to copy it to a computer running IIS version 5 or 6.

   1.2 How do I create pages for mobile devices?

   ASP.NET will automatically detect the type of browser making the request. This information is
   used by the page and by individual controls to render appropriate markup for that browser. You
   therefore do not need to use a special set of pages or controls for mobile devices. (Whether you
   can design a single page to work with all types of browsers will depend on the page, on the
   browsers you want to target, and on your own goals.)

   1.3 Are ASP.NET pages XHTML compatible?

   Yes. Individual controls render markup that is compatible with the XHTML 1.1 standard. It is up
   to you, however, to include the appropriate document type declaration and other XHTML
   document elements. ASP.NET does not insert elements for you to ensure XHTML compatibility.
   For details, see ASP.NET and XHTML Compliance.

   1.4 Can I hide the source code for my page?
Server-side code is processed on the server and is not sent to the browser, so users cannot see it.
However, client script is not protected; any client script that you add to your page, or that is
injected into the page by server processing, is visible to users. If you are concerned about
protecting your source code on the server, you can precompile your site and deploy the compiled
version. For details, see Publishing Web Sites.

1.5 When I run a page, I get the error "The page cannot be displayed"
and an HTTP 502 Proxy Error. Why?

This error can occur if you are running ASP.NET Web pages using the Visual Web Developer
Web server, because the URL includes a randomly selected port number. Proxy servers do not
recognize the URL and return this error. To get around the problem, change your settings in
Internet Explorer to bypass the proxy server for local addresses, so that the request is not sent to
the proxy. In Internet Explorer, you can make this change in Tools > Internet Options. In the
Connections tab, click LAN Settings and then select Bypass proxy server for local addresses.

1.6 Which page code model is preferable, single-file or code-behind?

Both models function the same and have the same performance. The choice of using single-file
pages versus code-behind pages is one of personal preference and convenience. For details, see
ASP.NET Web Page Code Model.

The QuickStart examples and examples in the API reference seem to use single-file pages
frequently. Does this mean that single-file is the preferred model for pages?

No. Single-file pages are frequently used in examples because they are easier to illustrate — the
writer does not have to create a separate file to show the code.

1.7 Is it better to write code in C# or Visual Basic?

You can write code for your Web application in any language supported by the .NET Framework.
That includes Visual Basic, C#, J#, JScript, and others. Although the languages have different
syntax, they all compile to the same object code. The languages have small differences in how
they support different features. For example, C# provides access to unmanaged code, while
Visual Basic supports implicit event binding via the Handles clause. However, the differences are
minor, and unless your requirements involve one of these small differences, the choice of
programming language is one of personal preference. Once programs are compiled, they all
perform identically; that is, Visual Basic programs run just as fast as C# programs, since they
both produce the same object code.

1.8 Do I have to use one programming language for all my Web pages?

No. Each page can be written in a different programming language if you want, even in the same
application. If you are creating source code files and putting them in the \App_Code folder to be
compiled at run time, all the code in must be in the same language. However, you can create
subfolders in the \App_Code folder and use the subfolders to store components written in
different programming languages.

1.9 Is the code in single-file and code-behind pages identical?

Almost. A code-behind file contains an explicit class declaration, which is not required for single-
file pages.

1.10 Is the old code-behind model still supported?

Old projects will continue to run without change. In Visual Studio 2005, if you open a project
created in Visual Studio .NET 2002 or 2003, by default, the project is converted to the new
project layout used in Visual Studio 2005. As part of the conversion, pages that use the old code-
behind model are converted to use the new code-behind model. Visual Studio 2005 Web
Application Projects provide an alternative web project model that uses the same project, build
and compilation semantics as the Visual Studio .NET 2003 code-behind model. For details, see
Visual Studio 2005 Web Application Projects.

2.1 Why is there no DataGrid control on the Toolbox?

The DataGrid control has been superseded by the GridView control, which can do everything the
DataGrid control does and more. The GridView control features automatic data binding; auto-
generation of buttons for selecting, editing, and deleting; automatic sorting; and automatic paging.
There is full backward compatibility for the DataGrid control, and pages that use the DataGrid
will continue to work as they did in version 1.0 of ASP.NET.

2.2 Can I still use the DataList and Repeater controls?
Absolutely. You can use them the way you always have. But note that the controls have been
enhanced to be able to interact with data source controls and to use automatic data binding. For
example, you can bind a DataList or Repeater control to a SqlDataSource control instead of
writing ADO.NET code to access the database.

2.3 What's the difference between login controls and Forms

Login controls are an easy way to implement Forms authentication without having to write any
code. For example, the Login control performs the same functions you would normally perform
when using the FormsAuthentication class—prompt for user credentials, validate them, and issue
the authentication ticket—but with all the functionality wrapped in a control that you can just drag
from the Toolbox in Visual Studio. Under the covers, the login control uses the
FormsAuthentication class (for example, to issue the authentication ticket) and ASP.NET
membership (to validate the user credentials). Naturally, you can still use Forms authentication
yourself, and applications you have that currently use it will continue to run.

3.1 Can I run Web pages on a remote computer using ASP.NET
Development Server?

Yes, you can create a file system Web application and specify a UNC pointing to another
computer as the location for the files. When you run a page in Visual Web Developer, it starts up
the ASP.NET Development Server locally, which in turn can read files from a remote computer.

3.2 When I try to run pages on a remote computer using the ASP.NET
Development Server, I get an error that says the BIOS limit has been
exceeded. What is the problem?

You might see this error if the remote computer is running Windows 2000 or Windows XP. If the
remote computer is running Windows 2000, you can follow the instructions in Microsoft
KnowledgeBase article 810886 to set the maximum number of concurrent connections to a higher
number. If you are running Windows XP, you might be able to avoid this error by closing existing
shared resources, including terminal server sessions, on the remote computer. (Windows XP is
configured with a fixed number of maximum concurrent network requests.)

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