Below are the list of top 150 asp.net Multiple objective type questions and answers pdf free download for experienced & freshers.
difference between ExecuteScalar and ExecuteNonQuery?
ANS:- ExecuteScalar returns output value where as ExecuteNonQuery does not return any value but the number of rows affected by the query. ExecuteScalar used for fetching a single value and ExecuteNonQuery used to execute Insert and Update statements.
What are the components of ADO.NET?
ANS:- The components of ADO.Net are Dataset, Data Reader, Data Adaptor, Command, connection.
What are the different types of cookies in ASP.NET?
ANS:- Session Cookie – Resides on the client machine for a single session until the user does not log out.
Persistent Cookie – Resides on a user’s machine for a period specified for its expiry, such as 10 days, one month, and never.
Persistent Cookie – Resides on a user’s machine for a period specified for its expiry, such as 10 days, one month, and never.
Which namespaces are necessary to create a localized application?
ANS:- System.Globalization
System.Resources.
System.Resources.
difference between an HtmlInputCheckBox control and an HtmlInputRadioButton control?
ANS:- In HtmlInputCheckBoxcontrol, multiple item selection is possible whereas in HtmlInputRadioButton controls, we can select only single item from the group of items.
Which data type does the RangeValidator control support?
ANS:- The data types supported by the RangeValidator control are Integer, Double, String, Currency, and Date.
What is the appSettings Section in the web.config file
ANS:- The appSettings block in web config file sets the user-defined values for the whole application.
For example, in the following code snippet, the specified ConnectionString section is used throughout the project for database connection:
<em><configuration>
<appSettings>
<add key="ConnectionString" value="server=local; pwd=password; database=default" />
</appSettings></em>
For example, in the following code snippet, the specified ConnectionString section is used throughout the project for database connection:
<em><configuration>
<appSettings>
<add key="ConnectionString" value="server=local; pwd=password; database=default" />
</appSettings></em>
List the major built-in objects in ASP.NET
ANS:-
Application
Request
Response
Server
Session
Context
Trace
Application
Request
Response
Server
Session
Context
Trace
List all templates of the Repeater control.
ANS:- ItemTemplate
AlternatingltemTemplate
SeparatorTemplate
HeaderTemplate
FooterTemplate
AlternatingltemTemplate
SeparatorTemplate
HeaderTemplate
FooterTemplate
How we can force all the validation controls to run?
ANS:- The Page.Validate() method is used to force all the validation controls to run and to perform validation.
Differentiate strong typing and weak typing
ANS:- In strong typing, the data types of variable are checked at compile time. On the other hand, in case of weak typing the variable data types are checked at runtime. In case of strong typing, there is no chance of compilation error. Scripts use weak typing and hence issues arises at runtime.
what is boxing and unboxing
ANS:- Boxing is assigning a value type to reference type variable.
Unboxing is reverse of boxing ie. Assigning reference type variable to value type variable.
Unboxing is reverse of boxing ie. Assigning reference type variable to value type variable.
How do you register JavaScript for webcontrols
ANS:- We can register javascript for controls using <CONTROL -name>Attribtues.Add(scriptname,scripttext) method.
What are the asp.net Security Controls
ANS:- <asp:Login>: Provides a standard login capability that allows the users to enter their credentials
<asp:LoginName>: Allows you to display the name of the logged-in user
<asp:LoginStatus>: Displays whether the user is authenticated or not
<asp:LoginView>: Provides various login views depending on the selected template
<asp:PasswordRecovery>: email the users their lost password
<asp:LoginName>: Allows you to display the name of the logged-in user
<asp:LoginStatus>: Displays whether the user is authenticated or not
<asp:LoginView>: Provides various login views depending on the selected template
<asp:PasswordRecovery>: email the users their lost password
What are the advantages of Passport authentication
ANS:- All the websites can be accessed using single login credentials. So no need to remember login credentials for each web site.
Users can maintain his/ her information in a single location.
Users can maintain his/ her information in a single location.
Explain the working of passport authentication?
ANS:- First of all it checks passport authentication cookie. If the cookie is not available then the application redirects the user to Passport Sign on page. Passport service authenticates the user details on sign on page and if valid then stores the authenticated cookie on client machine and then redirect the user to requested page
What is MVC?
ANS:- MVC is a framework used to create web applications. The web application base builds on Model-View-Controller pattern which separates the application logic from UI, and the input and events from the user will be controlled by the Controller.
What is RedirectPermanent in ASP.Net?
ANS:- RedirectPermanent Performs a permanent redirection from the requested URL to the specified URL. Once the redirection is done, it also returns 301 Moved Permanently responses.
How can we apply Themes to an asp.net application?
ANS:- We can specify the theme in web.config file. Below is the code example to apply theme:
<configuration>
<system.web>
<pages theme="Windows7" />
</system.web>
</configuration>ed.
<configuration>
<system.web>
<pages theme="Windows7" />
</system.web>
</configuration>ed.
What is Cross Page Posting?
ANS:- When we click submit button on a web page, the page post the data to the same page. The technique in which we post the data to different pages is called Cross Page posting. This can be achieved by setting POSTBACKURL property of the button that causes the postback. Findcontrol method of PreviousPage can be used to get the posted values on the page to which the page has been posted.
Explain role based security ?
ANS:- Role Based Security used to implement security based on roles assigned to user groups in the organization.
Then we can allow or deny users based on their role in the organization. Windows defines several built-in groups, including Administrators, Users, and Guests.
<AUTHORIZATION>< authorization >
< allow roles="Domain_Name\Administrators" / > < !-- Allow Administrators in domain. -- >
< deny users="*" / > < !-- Deny anyone else. -- >
< /authorization >
Then we can allow or deny users based on their role in the organization. Windows defines several built-in groups, including Administrators, Users, and Guests.
<AUTHORIZATION>< authorization >
< allow roles="Domain_Name\Administrators" / > < !-- Allow Administrators in domain. -- >
< deny users="*" / > < !-- Deny anyone else. -- >
< /authorization >
What is the difference between web config and machine config?
ANS:- Web config file is specific to a web application where as machine config is specific to a machine or server. There can be multiple web config files into an application where as we can have only one machine config file on a server.
What are the event handlers that we can have in Global.asax file?
ANS:- Application Events: Application_Start , Application_End, Application_AcquireRequestState, Application_AuthenticateRequest, Application_AuthorizeRequest, Application_BeginRequest, Application_Disposed, Application_EndRequest, Application_Error, Application_PostRequestHandlerExecute, Application_PreRequestHandlerExecute,
Application_PreSendRequestContent, Application_PreSendRequestHeaders, Application_ReleaseRequestState, Application_ResolveRequestCache, Application_UpdateRequestCache
Session Events: Session_Start,Session_End
Application_PreSendRequestContent, Application_PreSendRequestHeaders, Application_ReleaseRequestState, Application_ResolveRequestCache, Application_UpdateRequestCache
Session Events: Session_Start,Session_End
What is the good practice to implement validations in aspx page?
ANS:- Client-side validation is the best way to validate data of a web page. It reduces the network traffic and saves server resources.
How can we prevent browser from caching an ASPX page?
ANS:- We can SetNoStore on HttpCachePolicy object exposed by the Response object’s Cache property:
Response.Cache.SetNoStore ();
Response.Write (DateTime.Now.ToLongTimeString ());
Response.Cache.SetNoStore ();
Response.Write (DateTime.Now.ToLongTimeString ());
Write code to send e-mail from an ASP.NET application?
ANS:- MailMessage mailMess = new MailMessage ();
mailMess.From = "abc@gmail.com";
mailMess.To = "xyz@gmail.com";
mailMess.Subject = "Test email";
mailMess.Body = "Hi This is a test mail.";
SmtpMail.SmtpServer = "localhost";
SmtpMail.Send (mailMess);
MailMessage and SmtpMail are classes defined System.Web.Mail namespace.
mailMess.From = "abc@gmail.com";
mailMess.To = "xyz@gmail.com";
mailMess.Subject = "Test email";
mailMess.Body = "Hi This is a test mail.";
SmtpMail.SmtpServer = "localhost";
SmtpMail.Send (mailMess);
MailMessage and SmtpMail are classes defined System.Web.Mail namespace.
What is Protected Configuration?
ANS:- It is a feature used to secure connection string information.
Can we add code files of different languages in App_Code folder?
ANS:- No. The code files must be in same language to be kept in App_code folder.
Is it possible to create web application with both webforms and mvc?
ANS:- Yes. We have to include below mvc assembly references in the web forms application to create hybrid application.
System.Web.Mvc
System.Web.Razor
System.ComponentModel.DataAnnotations
System.Web.Mvc
System.Web.Razor
System.ComponentModel.DataAnnotations
List the events in page life cycle.
ANS:-
1) Page_PreInit
2) Page_Init
3) Page_InitComplete
4) Page_PreLoad
5) Page_Load
6) Page_LoadComplete
7) Page_PreRender
8)Render
1) Page_PreInit
2) Page_Init
3) Page_InitComplete
4) Page_PreLoad
5) Page_Load
6) Page_LoadComplete
7) Page_PreRender
8)Render
Which type if caching will be used if we want to cache the portion of a page instead of whole page?
ANS:- Fragment Caching: It caches the portion of the page generated by the request. For that, we can create user controls with the below code:
1 <%@ OutputCache Duration="120" VaryByParam="CategoryID;SelectedID"%>
1 <%@ OutputCache Duration="120" VaryByParam="CategoryID;SelectedID"%>
What are the different types of caching?
ANS:- ASP.NET has 3 kinds of caching :
Output Caching,
Fragment Caching,
Data Caching.
Output Caching,
Fragment Caching,
Data Caching.
What is caching?
ANS:- Caching is a technique used to increase performance by keeping frequently accessed data or files in memory. The request for a cached file/data will be accessed from cache instead of actual location of that file.
How you can add an event handler?
ANS:- Using the Attributes property of server side control.
e.g:
btnSubmit.Attributes.Add("onMouseOver","JavascriptCode();")
e.g:
btnSubmit.Attributes.Add("onMouseOver","JavascriptCode();")
What are the different Session state management options available in ASP.NET?
ANS:-In-Process
Out-of-Process.
In-Process stores the session in memory on the web server.
Out-of-Process Session state management stores data in an external server. The external server may be either a SQL Server or a State Server. All objects stored in session are required to be serializable for Out-of-Process state management.
Out-of-Process.
In-Process stores the session in memory on the web server.
Out-of-Process Session state management stores data in an external server. The external server may be either a SQL Server or a State Server. All objects stored in session are required to be serializable for Out-of-Process state management.
Where the viewstate is stored after the page postback?
ANS:-ViewState is stored in a hidden field on the page at client side. ViewState is transported to the client and back to the server, and is not stored on the server or any other external source.
What is ViewState?
ANS:-ViewState is used to retain the state of server-side objects between page post backs.
Which validator control you use if you need to make sure the values in two different controls matched?
ANS:-Compare Validator control.
What are the different validators in ASP.NET?
ANS:-
Required field Validator
Range Validator
Compare Validator
Custom Validator
Regular expression Validator
Summary Validator
Required field Validator
Range Validator
Compare Validator
Custom Validator
Regular expression Validator
Summary Validator
difference between Server.Transfer and Response.Redirect?
ANS:-In Server.Transfer page processing transfers from one page to the other page without making a round-trip back to the client’s browser. This provides a faster response with a little less overhead on the server. The clients url history list or current url Server does not update in case of Server.Transfer.
Response.Redirect is used to redirect the user’s browser to another page or site. It performs trip back to the client where the client’s browser is redirected to the new page. The user’s browser history list is updated to reflect the new address.
Response.Redirect is used to redirect the user’s browser to another page or site. It performs trip back to the client where the client’s browser is redirected to the new page. The user’s browser history list is updated to reflect the new address.
In which event of page cycle is the ViewState available?
ANS:-After the Init() and before the Page_Load().
What’s the use of Response.Output.Write()?
ANS:- We can write formatted output using Response.Output.Write().
What is ASP.Net?
ANS:-It is a framework developed by Microsoft on which we can develop new generation web sites using web forms(aspx), MVC, HTML, Javascript, CSS etc. Its successor of Microsoft Active Server Pages(ASP). Currently there is ASP.NET 4.0, which is used to develop web sites. There are various page extensions provided by Microsoft that are being used for web site development. Eg: aspx, asmx, ascx, ashx, cs, vb, html, XML etc.
150 [UPDATED] ASP.NET Interview Questions and Answers pdf
asp.net interview questions and answers list of top 150 latest frequently asked pdf free download for experienced & freshers.
1. What is ASP.Net?
2. What’s the use of Response.Output.Write()?
3. In which event of page cycle is the ViewState available?
4. What is the difference between Server.Transfer and Response.Redirect?
5. From which base class all Web Forms are inherited?
6. What are the different validators in ASP.NET?
7. Which validator control you use if you need to make sure the values in two different controls matched?
8. What is ViewState?
9. Where the viewstate is stored after the page postback?
10. How long the items in ViewState exists?
ASP .net Interview Questions :
11. What are the different Session state management options available in ASP.NET?
12. How you can add an event handler?
13. What is caching?
14. What are the different types of caching?
15. Which type if caching will be used if we want to cache the portion of a page instead of whole page?
16. List the events in page life cycle.
17. Can we have a web application running without web.Config file?
18. Is it possible to create web application with both webforms and mvc?
19. Can we add code files of different languages in App_Code folder?
20. What is Protected Configuration?
21. Write code to send e-mail from an ASP.NET application?
22. How can we prevent browser from caching an ASPX page?
23. What is the good practice to implement validations in aspx page?
24. What are the event handlers that we can have in Global.asax file?
25. Which protocol is used to call a Web service?
26. Can we have multiple web config files for an asp.net application?
27. What is the difference between web config and machine config?
28. Explain role based security ?
29. What is Cross Page Posting?
30. How can we apply Themes to an asp.net application?
31. What is RedirectPermanent in ASP.Net?
32. What is MVC?
33. Explain the working of passport authentication.
34. What are the advantages of Passport authentication?
35. What are the asp.net Security Controls?
36. How do you register JavaScript for webcontrols ?
37. In which event are the controls fully loaded?
38. what is boxing and unboxing?
39. Differentiate strong typing and weak typing
40. How we can force all the validation controls to run?
41. List all templates of the Repeater control.
42. List the major built-in objects in ASP.NET?
43. What is the appSettings Section in the web.config file?
44. Which data type does the RangeValidator control support?
45. What is the difference between an HtmlInputCheckBox control and an HtmlInputRadioButton control?
46. Which namespaces are necessary to create a localized application?
47. What are the different types of cookies in ASP.NET?
48. What is the file extension of web service?
49. What are the components of ADO.NET?
50. What is the difference between ExecuteScalar and ExecuteNonQuery?
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ASP.NET Interview Questions and Answers :-
 |
| ASP.NET Interview Questions |
2. What’s the use of Response.Output.Write()?
3. In which event of page cycle is the ViewState available?
4. What is the difference between Server.Transfer and Response.Redirect?
5. From which base class all Web Forms are inherited?
6. What are the different validators in ASP.NET?
7. Which validator control you use if you need to make sure the values in two different controls matched?
8. What is ViewState?
9. Where the viewstate is stored after the page postback?
10. How long the items in ViewState exists?
ASP .net Interview Questions :
11. What are the different Session state management options available in ASP.NET?
12. How you can add an event handler?
13. What is caching?
14. What are the different types of caching?
15. Which type if caching will be used if we want to cache the portion of a page instead of whole page?
16. List the events in page life cycle.
17. Can we have a web application running without web.Config file?
18. Is it possible to create web application with both webforms and mvc?
19. Can we add code files of different languages in App_Code folder?
20. What is Protected Configuration?
21. Write code to send e-mail from an ASP.NET application?
22. How can we prevent browser from caching an ASPX page?
23. What is the good practice to implement validations in aspx page?
24. What are the event handlers that we can have in Global.asax file?
25. Which protocol is used to call a Web service?
26. Can we have multiple web config files for an asp.net application?
27. What is the difference between web config and machine config?
28. Explain role based security ?
29. What is Cross Page Posting?
30. How can we apply Themes to an asp.net application?
31. What is RedirectPermanent in ASP.Net?
32. What is MVC?
33. Explain the working of passport authentication.
34. What are the advantages of Passport authentication?
35. What are the asp.net Security Controls?
36. How do you register JavaScript for webcontrols ?
37. In which event are the controls fully loaded?
38. what is boxing and unboxing?
39. Differentiate strong typing and weak typing
40. How we can force all the validation controls to run?
41. List all templates of the Repeater control.
42. List the major built-in objects in ASP.NET?
43. What is the appSettings Section in the web.config file?
44. Which data type does the RangeValidator control support?
45. What is the difference between an HtmlInputCheckBox control and an HtmlInputRadioButton control?
46. Which namespaces are necessary to create a localized application?
47. What are the different types of cookies in ASP.NET?
48. What is the file extension of web service?
49. What are the components of ADO.NET?
50. What is the difference between ExecuteScalar and ExecuteNonQuery?
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