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Freshers / Beginner level questions & answers

Ques 1. Describe the role of inetinfo.exe, aspnet_isapi.dll andaspnet_wp.exe in the page loading process.

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.

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Ques 2. What’s the difference between Response.Write() andResponse.Output.Write()?

Response.Output.Write() allows you to write formatted output.

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Ques 3. What methods are fired during the page load?

Init() - when the page is instantiated
Load() - when the page is loaded into server memory
PreRender() - the brief moment before the page is displayed to the user as HTML
Unload() - when page finishes loading.

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Ques 4. When during the page processing cycle is ViewState available?

After the Init() and before the Page_Load(), or OnLoad() for a control.

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Ques 5. What namespace does the Web page belong in the .NET Framework class hierarchy?

System.Web.UI.Page

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Ques 6. Where do you store the information about the user’s locale?

System.Web.UI.Page.Culture

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Ques 7. What’s the difference between Codebehind="MyCode.aspx.cs" andSrc="MyCode.aspx.cs"?

CodeBehind is relevant to Visual Studio.NET only.

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Ques 8. 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.

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Ques 9. Suppose you want a certain ASP.NET function executed on MouseOver for a certain button.Where do you add an event handler?

Add an OnMouseOver attribute to the button.Example: btnSubmit.Attributes.Add("onmouseover","someClientCodeHere();");

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Ques 10. What data types do the RangeValidator control support?

Integer, String, and Date.

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Ques 11. Explain the differences between Server-side and Client-side code?

Server-side code executes on the server.Client-side code executes in the client's browser.

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Ques 12. What type of code (server or client) is found in a Code-Behind class?

The answer is server-side code since code-behind is executed on the server.However,
during the code-behind's execution on the server, it can render client-side code such
as JavaScript to be processed in the clients browser.But just to be clear, code-behind
executes on the server, thus making it server-side code.

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Ques 13. Should user input data validation occur server-side or client-side?Why?

All user input data validation should occur on the server at a minimum.Additionally,
client-side validation can be performed where deemed appropriate and feasable to
provide a richer, more responsive experience for the user.

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Ques 14. What is the difference between Server.Transfer and Response.Redirect?Why would I choose one over the other?

Server.Transfer transfers page processing from one page directly to the next 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.Server.Transfer does not update the
clients url history list or current url.Response.Redirect is used to redirect the user's
browser to another page or site.This performas a 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.

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Ques 15. Can you explain the difference between an ADO.NET Dataset and an ADO Recordset?

Valid answers are:
·A DataSet can represent an entire relational database in memory, complete with
tables, relations, and views.
·A DataSet is designed to work without any continuing connection to the original data
source.
·Data in a DataSet is bulk-loaded, rather than being loaded on demand.
·There's no concept of cursor types in a DataSet.
·DataSets have no current record pointer You can use For Each loops to move
through the data.
·You can store many edits in a DataSet, and write them to the original data source in
a single operation.
·Though the DataSet is universal, other objects in ADO.NET come in different
versions for different data sources.

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Ques 16. What is the Global.asax used for?

The Global.asax (including the Global.asax.cs file) is used to implement application and session level events.

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Ques 17. What are the Application_Start and Session_Start subroutines used for?

This is where you can set the specific variables for the Application and Session objects.

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Ques 18. Can you explain what inheritance is and an example of when you might use it?

When you want to inherit (use the functionality of) another class.Example: With a base class named Employee, a Manager class could be derived from the Employee base class.

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Ques 19. Whats an assembly?

Assemblies are the building blocks of the .NET framework. Overview of assemblies from MSDN

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Ques 20. Describe the difference between inline and code behind.

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

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Ques 21. 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 Service.

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Ques 22. Whats MSIL, and why should my developers need an appreciation of it if at all?

MSIL is the Microsoft Intermediate Language. All .NET compatible languages will get
converted to MSIL.MSIL also allows the .NET Framework to JIT compile the assembly
on the installed computer.

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Ques 23. Which method do you invoke on the DataAdapter control to load your generated dataset with data?

The Fill() method.

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Ques 24. Can you edit data in the Repeater control?

No, it just reads the information from its data source.

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Ques 25. Which template must you provide, in order to display data in a Repeater control?

ItemTemplate.

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Ques 26. How can you provide an alternating color scheme in a Repeater control?

Use the AlternatingItemTemplate.

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Ques 27. What property must you set, and what method must you call in your code, in order to bind the data from a data source to the Repeater control?

You must set the DataSource property and call the DataBind method.

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Ques 28. What base class do all Web Forms inherit from?

The Page class.

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Ques 29. Name two properties common in every validation control?

ControlToValidate property and Text property.

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Ques 30. Which property on a Combo Box do you set with a column name, prior to setting the DataSource, to display data in the combo box?

DataTextField property.

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Ques 31. Which control would you use if you needed to make sure the values in two different controls matched?

CompareValidator control.

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