Top 30 ASP.NET Interview Questions And Answers – Tips For Freshers/Exp
ASP.NET Interview Questions
ASP.NET is the web developing language
which is used in IT industries and ASP.NET was released in January 2002 with
version 1.0 of the .NET Framework. Individuals who are
preparing for ASP.NET language to make attractive web pages and looking
for Top 30 ASP.NET Interview Questions And Answers, ASP.NET Interview
Tips For Freshers/Exp are at correct path.
ASP.NET language is an open-source
server-side web application structure build by Microsoft for web development to
create dynamic web pages as well as web services. Before making a web developer
in ASP.NET, candidates have to face an interview.
ASP.NET Interview:
ASP.NET Interview is just formal
conversation between the Interviewee and Interviewer. Interview Question is the
main problem for the candidate but we are here to help you by giving some
interview question regarding ASP.NET. The ASP.NET application codes can be
written in any of the following languages:
- C#
- Visual Basic.Net
- Jscript
- J#
ASP.NET Interview Questions
Have a look on ASP.NET Interview Questions
and Answers to start preparation for ASP.NET Interview.
Question 1: What is ASP.Net?
Answer: 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.
Question 2: What’s the use of Response.Output.Write()?
Answer: We can write formatted output
using Response.Output.Write().
Question 3: Can we add code files of
different languages in App_Code folder?
Answer: No. The code files must be in same language to be kept in App_code
folder.
Question 4: What is Protected Configuration?
Answer: It is a feature used to secure connection string information.
Question 5: In which event of page cycle is the ViewState available?
Answer: After the Init() and before the Page_Load().
Question 6: What is the difference between Server.Transfer and
Response.Redirect?
Answer: 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.
Question 7: From which base class all Web Forms are inherited?
Answer: Page class.
Question 8: What are the different validators in ASP.NET?
Answer:
Required field Validator
|
Range
Validator
|
Compare Validator
|
Custom Validator
|
Regular expression Validator
|
Summary Validator
|
Question 9: Which validator control you use if you need to make sure the
values in two different controls matched?
Answer: Compare Validator control.
Question 10: What is ViewState?
Answer: ViewState is used to retain the state of server-side objects
between page post backs.
Question 11: what is boxing and unboxing?
Answer:
- Boxing is assigning a value type to reference type variable.
- Unboxing is reverse of boxing ie. Assigning reference type variable to value type variable.
Answer: 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.
Question 13: Where the viewstate is stored after the page postback?
Answer: 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.
Question 14: What is the good practice to implement validations in aspx page?
Answer: Client-side validation is the best way to validate data of a web
page. It reduces the network traffic and saves server resources.
Question 15: Can we have multiple web config files for an asp.net application?
Answer: Yes.
Question 16: What is the difference between web config and machine config?
Answer: 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.
Question 17: How long the items in ViewState exists?
Answer: They exist for the life of the current page.
Question 18: What are the different Session state management options available
in ASP.NET?
Answer: ASP .net Interview Questions
- In-Process
- Out-of-Process.
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.
Question 19: How you can add an event handler?
Answer: Using the Attributes property of server side control.
Question 20: What is the file extension of web service?
Answer: Web services have file extension .asmx..
Question 21: What are the components of ADO.NET?
Answer: The components of ADO.Net are Dataset, Data Reader, Data Adaptor,
Command, connection.
Question 22: What is caching?
Answer: 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.
Question 23: What are the event handlers that we can have in Global.asax file?
Answer:
- 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
Question 24: Which protocol is used to call a Web service?
Answer: HTTP Protocol
Question 25: What are the different types of caching?
Answer:
ASP.NET has 3 kinds of caching:
- Output Caching,
- Fragment Caching,
- Data Caching.
Answer: 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.
Question 27: What are the asp.net Security Controls?
Answer:
<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
Question 28: List the events in page life cycle.
Answer:
Page_PreInit
|
Page_Init
|
Page_InitComplete
|
Page_PreLoad
|
Page_Load
|
Page_LoadComplete
|
Page_PreRender
|
Render
|
Question 29: Can we have a web application running without web.Config file?
Answer: Yes
Question 30: Which data type does the RangeValidator control support?
Answer: The data types supported by the RangeValidator control are
Integer, Double, String, Currency, and Date.
Question 31: What is the difference between an HtmlInputCheckBox control and an
HtmlInputRadioButton control?
Answer: In HtmlInputCheckBoxcontrol, multiple item selection is possible
whereas in HtmlInputRadioButton controls, we can select only single item from
the group of items.
Question 32: Is it possible to create web application with both webforms and
mvc?
Answer: Yes. We have to include mvc assembly references in the web forms
application to create hybrid application.
Question 33: What is Cross Page Posting?
Answer: 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.
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Question 34: What is RedirectPermanent in ASP.Net?
Answer: 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.
Question 35: What is MVC?
Answer: 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.
Question 36: What are the different types of cookies in ASP.NET?
Answer:
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.
Question 37: What is the difference between ExecuteScalar and ExecuteNonQuery?
Answer: 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.
Question 38: Explain the working of passport authentication.
Answer: 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.
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Question 39: How do you register JavaScript for webcontrols ?
Answer: We can register javascript for controls using <CONTROL
-name>Attribtues.Add(scriptname,scripttext) method.
Question 40: In which event are the controls fully loaded?
Answer: Page load event.
Question 41: How we can force all the validation controls to run?
Answer: The Page.Validate() method is used to force all the validation
controls to run and to perform validation.
Question 42: List all templates of the Repeater control.
Answer:
ItemTemplate
|
AlternatingltemTemplate
|
SeparatorTemplate
|
HeaderTemplate
|
FooterTemplate
|
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Are Your Goals In Life For Future?
Question 43: List the major built-in objects in ASP.NET?
Answer:
Application
|
Request
|
Response
|
Server
|
Session
|
Context
|
Trace
|
Question 44: Which namespaces are necessary to create a localized application?
Answer:
- System.Globalization
- System.Resources
Answer:Languages that .NET supports are,
- NET
- C#
- COBOL
- PERL
Answer:Datatype int in .NET is 32 bits.
Question 47: Mention what is .Net Namespaces?
Answer: Namespaces in .NET is nothing but a way to organize .NET Framework
Class Library into a logical grouping according to their usability,
functionality as well as category they belong to.
Question 48: Mention what is MSIL in .NET?
Answer:
- MSIL stands for Microsoft Intermediate Language
- During the compile time, the source code is converted into Microsoft Intermediate Language (MSIL) by compiler
- MSIL is a CPU-independent set of instructions that can be efficiently converted to the native code
Answer:The type of code security available in .NET are
Role based security: This authorizes the
user.
Code access security: This protects system
resources from unauthorized calls.
Question 50: Mention what is the difference between structures and classes in
.NET?
Classes
|
Structures
|
Usually, it is used for large volume of data
|
It is used for smaller amounts of data
|
It can be inherited
|
It cannot be inherited
|
It can be NULL
|
It cannot be NULL like the class.
|
For class the keyword used is ‘class’.
|
For structure the keyword used is ‘struct’.
|
By default class member variables are private.
|
By default structure, members have public access.
|
It contains a volatile field.
|
It cannot contain the volatile field.
|
Cannot use size of operator
|
Can use size of operator
|
Fields are automatically initialized
|
Fields are not initialized automatically
|
Interview
Tips for Freshers/ Experienced candidates:
- Practice and Prepare well for Interview
- You need to develop a Connection with the Interviewer
- Research the Company, and Show What You Know
- Get Ready Ahead of Time
- Be On Time (That Means Early)
- Try to Stay Calm
- Follow-Up After the Interview
- Avoid Common Interview Mistakes
- Successfully Handle Any Type of Interview
What Makes an Interview Successful?
It’s Social
|
You should express that you’d be a delighted to work
with.
|
It’s Professional
|
Your appearance must be sharp, efficient, and
diplomatic.
|
It’s Human
|
You need to present yourself as genuine and earnest.
|
The Details Matter
|
From your outfit to your posture, everything is
information.
|
What Employers Look For At An Interview?
Your Appearance
|
Are you stylish, professional, and meticulous?
|
Your Tact
|
Do you understand appropriate professional language
and etiquette?
|
Your Body Language
|
Are you someone who projects success and commands
respect?
|
Your Confidence
|
Do you feel qualified for the job and able to handle
the responsibilities?
|
Important Note:
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Questions And Answers from this page which is well prepared by the team of www.privatejobshub.in.
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