SharePoint Programming

Interview Questions for Developers - A four-part series.

Part 1 Part 2 Part 3 Part 4 Part 5 {new}


Q. How would you pass user credentials while using SharePoint WebService from your Web Part or application.

Ans. The web service needs credentials to be set before making calls.

Examples:

listService.UseDefaultCredentials = true; // use currently logged on user

listService.Credentials = new System.Net.NetworkCredential("user", "pass", "domain"); // use specified user


Q. How would you remove a webapart from the WebPart gallery? Does it get removed with Webpart retraction?

Ans. No, Webpart does not get removed from the WebPart gallery on retraction. You can write a feature receiver on Featuredeactivating method to remove the empty webpart from the gallery.


Q. What is a SharePoint Feature? Features are installed at what scope

Ans. A SharePoint Feature is a functional component that can be activated and deactivate at various scopes throughout a SharePoint instances, scope of which are defined as
1. Farm level 2. Web Application level 3. Site level 4. Web level
Features have their own receiver architecture, which allow you to trap events such as when a feature is Installing, Uninstalling, Activated, or Deactivated.



Q. What type of components can be created or deployed as a feature?

Ans. We can create menu commands, Custom Actions,page templates, page instances, list definitions, list instances,event handlers,webparts and workflows as feature.

Q. How Do you bind a Drop-Down Listbox with a Column in SharePoint List ?

Ans.
Method 1 : You can get a datatable for all items in the list and add that table to a data set. Finally, specify the dataset table as datasource for dropdown listbox.

Method 2 : You can also use SPDatasource in your aspx or design page.
See Code example Binding Drop-Down with Sharepoint List data



Q. How Does SharePoint work?

Ans. The browser sends a DAV packet to IIS asking to perform a document check in. PKMDASL.DLL, an ISAPI DLL, parses the packet and sees that it has the proprietary INVOKE command. Because of the existence of this command, the packet is passed off to msdmserv.exe, who in turn processes the packet and uses EXOLEDB to access the WSS, perform the operation and send the results back to the user in the form of XML.


Q. What is CAML?

Ans. CAML stands for Collaborative Application Markup Language and is an XML-based languagethat is used in Microsoft Windows SharePoint Services to define sites and lists, including, for Eg, fields, views, or forms, but CAML is also used to define tables in the Windows SharePoint Servies database during site provisioning. Developers mostly use CAML Queries to retrieve data from Lists\libraries.


Q. Can you display\add a Custom aspx or WebApplication Page in SharePoint Context ?

Ans. You need to make some modification in the aspx file to display it in SharePoint Context. Firstly, add the references for various sharepoint assemblies on the Page. Then wrap the Code in PlaceHolderMain contentPlaceholder, so that it gets displayed as a content page. Lastly, add a reference to SharePoint Master Page in aspx file and swicth it in Code behind if needed. See Code Example at Display aspx Page in SharePoint context

Part 1 Part 2 Part 3 Part 4

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