Microsoft Most Frequently Asked Latest ASP.NET Interview Questions Answers
What Is Configuration Api?
ASP.NET 2.0 contains new configuration management API's, enabling users to programmatically build programs or scripts that create, read, and update Web.config and machine.config configuration files.
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.
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.
How Is Application Management And Maintenance Improved In Asp.net 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.
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.
Explain Server Control Extensibility With Reference To Asp.net 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.
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.
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 Web.config.
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.
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).
Explain How Caching In Asp.net 2.0 Is Different From Caching In Asp.net 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 state data.
Can We Bind Data To A Server Control Without Writing Code In .net?
Yes, that is possible. ASP.NET 2.0 has the feature of declarative solution for data binding which requires no code at all for the most common data scenarios, such as
Selecting and displaying
Data Sorting
Paging and Caching
Data Updating
Inserting and Deleting Data
What Is A Nested Masterpage In Asp.net 2.0? Can There Be A Master Page Inside A Masterpage?
When a master page is placed inside the contentplaceholder of a masterpage, then the masterpage is said to be nested. In other words, there is one parent masterpage, and the child masterpage is inside the content placeholder of the parent masterpage.
How To Sort The Contents Of A Gridview Control?
The ASP.NET 2.0 GridView control is a powerful control, the enables sorting of the rows based on a column, all this possible, without writing code. Well thats what we call power.
The GridView control relies on the underlying data source control to whom this is bound for the sorting capability. The GridView needs to have an AccessDataSource or an SQlDataSource or an ObjectDataSource (if the SortParameterName property is set to a value allowed.
The AllowSorting property of the GridView control, when set to true, enables sorting of the GridView. A sortable GridView has the Header column represented as a LinkButton control. When this Link Button is clicked, the Sorting event of the GridView is raised server-side, which causes a postback and in turn, sorts the GridView control's records.
What Does The Hotspot Class In .net Do? What Is An Imagemap In Asp.net?
An ImageMap is an ASP.NET control that allows clicks inside a polygon like (called Hotspot) region in a webpage. Well, that actually means you may create a star-shaped or diamond shaped button.
There are several pre-defined shapes allowed inside an ImageMap for which templates may be used. For example, for a rectangle, an asp:RectangularHotSpot may be used. For a circle, an asp:CircleHotSpot may be used. And for creating stars & diamonds, an asp:PolygonHotSpot may be used. An image may also be put in an ImageMap which may be specified by its ImageUrl property.
In order to invoke an event, the HotSpotMode property needs to be set to PostBack. Further, if several HotSpots are placed inside an ImageMap, the event of the ImageMap may be passed a value using the PostBackValue property.
Code below shows how to create a Polygon HotSpot using an ImageMap.
<asp:ImageMap ID="ImageMap1" Runat="Server"
ImageUrl="Photo.gif" OnClick="SomeEvent"
AlternateText="Click Here"
HotSpotMode="Navigate">
<asp:PolygonHotSpot
AlternateText="Click Here Too!"
Coordinates="100,150, 250,350, 210,290, 90,350, 60,240"
NavigateUrl="http://www.asp.net"
Target="_blank"/>
</asp:ImageMap>
How Do We Update And Delete Data In A Gridview? Datakeynames Property In .net?
The best way to Update or Delete a record in a GridView control is to include a CheckBox column and a Submit Button.
The GridView has its own Delete and Edit functionality. If the GridView is populated with data using an SqlDataSource, checkout the wizard that comes along with the SqlDataSource. It may be used to automatically create an SQL Delete command and specify the delete parameters.
The DataKeyNames property of the GridView is set to a field name of the Table.
What Is Asp.net?
ASP.NET is a programming framework built on the common language runtime that can be used on a server to build powerful Web applications.
Why Does My Asp.net File Have Multiple Tag With Runat=server?
This means that ASP.Net is not properly registered with IIS. .Net framework provides an Administration utility that manages the installation and uninstallation of multiple versions of ASP.NET on a single machine. You can find the file in C:\WINNT\Microsoft.NET \Framework\v**\aspnet_regiis.exe
use the command: aspnet_regiis.exe -u ---> to uninstall current asp.net version.
use the command: aspnet_regiis.exe -i ---> to install current asp.net version.
For Windows Server 2003, you must use aspnet_regiis -i -enable This is because of the "Web Service Extensions" feature in IIS 6 (if you install VS.NET or the framework without IIS installed, and then go back in and install IIS afterwards, you have to re-register so that ASP.NET 'hooks' into IIS properly."
How To Find Out What Version Of Asp.net I Am Using On My Machine?
VB.NET
Response.Write(System.Environment.Version.ToString())
C#
Response.Write(System.Environment.Version.ToString());
Is It Possible To Pass A Querystring From An .asp Page To Aspx Page?
Yes you can pass querystring from .asp to ASP.NET page.asp <%response.redirect "webform1.aspx?id=11 " %> .aspx
VB.NET
Response.Write (Request("id").ToString())
C#
Response.Write (Request["id"].ToString());
How To Comment Out Asp.net Tags?
<%--<asp:Label id="Label1" style="Z-INDEX: 101; LEFT: 8px; POSITION: absolute; TOP: 48px" runat="server"> Label</asp: Label>--%>
What Is A Viewstate?
In classic ASP, when a form is submitted the form values are cleared. In some cases the form is submitted with huge information. In such cases if the server comes back with error, one has to re-enter correct information in the form. But submitting clears up all form values. This happens as the site does not maintain any state (ViewState).
In ASP.NET, when the form is submitted the form reappears in the browser with all form values. This is because ASP.NET maintains your ViewState. ViewState is a state management technique built in ASP.NET. Its purpose is to keep the state of controls during subsequent postbacks by the same user. The ViewState indicates the status of the page when submitted to the server. The status is defined through a hidden field placed on each page with a <form runat="server"> control.
<input type="hidden" name= "_VIEWSTATE" value="dDwyNTA 3OTU0NDM7Oz 7t5Tntzk OUeB0QVV6FT2hvQwtp" Pw =="/>
If you want to NOT maintain the ViewState, include the directive <%@ Page Enable View State="false"%> at the top of an .aspx page If you do not want to maintain Viewstate for any control add the attribute Enable View State="false" to any control.
What Are The New Data Controls In Asp.net 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.
What Are The New Navigation Controls In Asp.net 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.
What Are The New Login Controls In Asp.net 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.
Can You Inherit Multiple Interfaces?
Yes,
And If They Have Conflicting Method Names?
It’s up to you to implement the method inside your own class, so implementation is left entirely up to you. This might cause a problem on a higher-level scale if similarly named methods from different interfaces expect different data.
What Is The Difference Between An Interface And Abstract Class?
In the interface all methods must be abstract; in the abstract class some methods can be concrete. In the interface no accessibility modifiers are allowed, which is ok in abstract classes.
What Is Configuration Api?
ASP.NET 2.0 contains new configuration management API's, enabling users to programmatically build programs or scripts that create, read, and update Web.config and machine.config configuration files.
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.
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.
How Is Application Management And Maintenance Improved In Asp.net 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.
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.
Explain Server Control Extensibility With Reference To Asp.net 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.
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.
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| Microsoft Most Frequently Asked Latest ASP.NET Interview Questions Answers |
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 Web.config.
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.
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).
Explain How Caching In Asp.net 2.0 Is Different From Caching In Asp.net 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 state data.
Can We Bind Data To A Server Control Without Writing Code In .net?
Yes, that is possible. ASP.NET 2.0 has the feature of declarative solution for data binding which requires no code at all for the most common data scenarios, such as
Selecting and displaying
Data Sorting
Paging and Caching
Data Updating
Inserting and Deleting Data
What Is A Nested Masterpage In Asp.net 2.0? Can There Be A Master Page Inside A Masterpage?
When a master page is placed inside the contentplaceholder of a masterpage, then the masterpage is said to be nested. In other words, there is one parent masterpage, and the child masterpage is inside the content placeholder of the parent masterpage.
How To Sort The Contents Of A Gridview Control?
The ASP.NET 2.0 GridView control is a powerful control, the enables sorting of the rows based on a column, all this possible, without writing code. Well thats what we call power.
The GridView control relies on the underlying data source control to whom this is bound for the sorting capability. The GridView needs to have an AccessDataSource or an SQlDataSource or an ObjectDataSource (if the SortParameterName property is set to a value allowed.
The AllowSorting property of the GridView control, when set to true, enables sorting of the GridView. A sortable GridView has the Header column represented as a LinkButton control. When this Link Button is clicked, the Sorting event of the GridView is raised server-side, which causes a postback and in turn, sorts the GridView control's records.
What Does The Hotspot Class In .net Do? What Is An Imagemap In Asp.net?
An ImageMap is an ASP.NET control that allows clicks inside a polygon like (called Hotspot) region in a webpage. Well, that actually means you may create a star-shaped or diamond shaped button.
There are several pre-defined shapes allowed inside an ImageMap for which templates may be used. For example, for a rectangle, an asp:RectangularHotSpot may be used. For a circle, an asp:CircleHotSpot may be used. And for creating stars & diamonds, an asp:PolygonHotSpot may be used. An image may also be put in an ImageMap which may be specified by its ImageUrl property.
In order to invoke an event, the HotSpotMode property needs to be set to PostBack. Further, if several HotSpots are placed inside an ImageMap, the event of the ImageMap may be passed a value using the PostBackValue property.
Code below shows how to create a Polygon HotSpot using an ImageMap.
<asp:ImageMap ID="ImageMap1" Runat="Server"
ImageUrl="Photo.gif" OnClick="SomeEvent"
AlternateText="Click Here"
HotSpotMode="Navigate">
<asp:PolygonHotSpot
AlternateText="Click Here Too!"
Coordinates="100,150, 250,350, 210,290, 90,350, 60,240"
NavigateUrl="http://www.asp.net"
Target="_blank"/>
</asp:ImageMap>
How Do We Update And Delete Data In A Gridview? Datakeynames Property In .net?
The best way to Update or Delete a record in a GridView control is to include a CheckBox column and a Submit Button.
The GridView has its own Delete and Edit functionality. If the GridView is populated with data using an SqlDataSource, checkout the wizard that comes along with the SqlDataSource. It may be used to automatically create an SQL Delete command and specify the delete parameters.
The DataKeyNames property of the GridView is set to a field name of the Table.
What Is Asp.net?
ASP.NET is a programming framework built on the common language runtime that can be used on a server to build powerful Web applications.
Why Does My Asp.net File Have Multiple Tag With Runat=server?
This means that ASP.Net is not properly registered with IIS. .Net framework provides an Administration utility that manages the installation and uninstallation of multiple versions of ASP.NET on a single machine. You can find the file in C:\WINNT\Microsoft.NET \Framework\v**\aspnet_regiis.exe
use the command: aspnet_regiis.exe -u ---> to uninstall current asp.net version.
use the command: aspnet_regiis.exe -i ---> to install current asp.net version.
For Windows Server 2003, you must use aspnet_regiis -i -enable This is because of the "Web Service Extensions" feature in IIS 6 (if you install VS.NET or the framework without IIS installed, and then go back in and install IIS afterwards, you have to re-register so that ASP.NET 'hooks' into IIS properly."
How To Find Out What Version Of Asp.net I Am Using On My Machine?
VB.NET
Response.Write(System.Environment.Version.ToString())
C#
Response.Write(System.Environment.Version.ToString());
Is It Possible To Pass A Querystring From An .asp Page To Aspx Page?
Yes you can pass querystring from .asp to ASP.NET page.asp <%response.redirect "webform1.aspx?id=11 " %> .aspx
VB.NET
Response.Write (Request("id").ToString())
C#
Response.Write (Request["id"].ToString());
How To Comment Out Asp.net Tags?
<%--<asp:Label id="Label1" style="Z-INDEX: 101; LEFT: 8px; POSITION: absolute; TOP: 48px" runat="server"> Label</asp: Label>--%>
What Is A Viewstate?
In classic ASP, when a form is submitted the form values are cleared. In some cases the form is submitted with huge information. In such cases if the server comes back with error, one has to re-enter correct information in the form. But submitting clears up all form values. This happens as the site does not maintain any state (ViewState).
In ASP.NET, when the form is submitted the form reappears in the browser with all form values. This is because ASP.NET maintains your ViewState. ViewState is a state management technique built in ASP.NET. Its purpose is to keep the state of controls during subsequent postbacks by the same user. The ViewState indicates the status of the page when submitted to the server. The status is defined through a hidden field placed on each page with a <form runat="server"> control.
<input type="hidden" name= "_VIEWSTATE" value="dDwyNTA 3OTU0NDM7Oz 7t5Tntzk OUeB0QVV6FT2hvQwtp" Pw =="/>
If you want to NOT maintain the ViewState, include the directive <%@ Page Enable View State="false"%> at the top of an .aspx page If you do not want to maintain Viewstate for any control add the attribute Enable View State="false" to any control.
What Are The New Data Controls In Asp.net 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.
What Are The New Navigation Controls In Asp.net 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.
What Are The New Login Controls In Asp.net 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.
Can You Inherit Multiple Interfaces?
Yes,
And If They Have Conflicting Method Names?
It’s up to you to implement the method inside your own class, so implementation is left entirely up to you. This might cause a problem on a higher-level scale if similarly named methods from different interfaces expect different data.
What Is The Difference Between An Interface And Abstract Class?
In the interface all methods must be abstract; in the abstract class some methods can be concrete. In the interface no accessibility modifiers are allowed, which is ok in abstract classes.
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