.NET WebDev interview questions - Part 3

1. State True or False: If you set AutoGenerateColumns=True and still provide custom column definitions, the DataGrid will render both
   • True
   • False
2. The data from an XSL Transform with XmlReader can be returned in one of the following ways
   • objReader = objXslT.Transform(objNav, nothing)
   • objXslT.Transform(objNav, nothing)
   • objReader = objXslT.Transform(objNav, nothing, objWriter)
   • objXslT.Transform(objNav, nothing, objWriter)
3. Pick the command line that would result in the C# compiler generating an XML documentation file
   • csc /doc:NewHome.xml NewHome.cs
     
     
   • c /doc /docfile: NewHome.xml NewHome.cs
   • csc /doc /out: NewHome.xml NewHome.cs
     
     
   • csc /xml NewHome.cs
4. What is the comment syntax for C#’s XML-based documentation?
   • /** and **/
   • //#
   • ///
   • //*
5. When creating a C# Class Library project, what is the name of the supplementary file that Visual Studio.NET creates that contains General Information about the assembly?
   • AssemblyInfo.xml
     
     
   • AssemblyInfo.cs
   • AssemblyInformation.cs
     
     
   • AssemblyAttributes.cs
6. Which of the following is the C# escape character for Null?
   • \n
   • \0
   • \f
   • \v
7. What is the exception that is thrown when there is an attempt to dynamically access a method that does not exist?
   • MissingMethodException
   • TypeLoadException
   • MethodLoadException
   • MethodAccessException
8. What method(s) must be used with the Application object to ensure that only one process accesses a variable at a time?
   • Synchronize()
   • Lock() and UnLock()
   • Lock()
   • Asynchroize()
9. After capturing the SelectedIndexChanged event for a ListBox control, you find that the event handler doesn’t execute. What could the problem be?
   • The AutoEventWireup attribute is set to False
   • The AutomaticPostBack attribute is set to False
   • The codebehind module is not properly compiled
   • The ListBox must be defined WithEvents
10. What method must be overridden in a custom control?
    • The Paint() method
    • The Control_Build() method
      
      
    • The Render() method
    • The default constructor
11. What is used to validate complex string patterns like an e-mail address?
    • Extended expressions
    • Regular expressions
    • Irregular expressions
    • Basic expressions
12. The following is a valid statement in ASP.NET<%@ Page Language="C" %>
    • True
    • False
13. A valid comment block in ASP.NET is
    • <% - - Comment - - %>
    • <% ! - - Comment - - >
14. The event handlers that can be included in the Global.asax file are
    • Application Start and
      
      Session Start event handlers only
    • Application End and
      
      Session End event handlers only
    • Per-request and Non-deterministic event handlers only
    • Application Start and End ,
      
      Session Start and End, Per-request and Non-deterministic event handlers
15. A Few of the Namespaces that get imported by default in an ASPX file are
    • System, System.Data, System.Drawing,
      
      System.Globalization
      
      
    • System,
      
      System.IO, System.Management, System.Globalization
    • System, System.Collections,
      
      System.Text, System.Web
    • System,
      
      System.NET,
      
      System.Reflection, System.Web
16. The Assemblies that can be referenced in an ASPX file without using @Assembly Directive is
    • System.dll, System.Data.dll,
      
      System.Web.dll, System.Xml.dll,
      
      
    • System.dll,
      
      System.Collections.dll, System.IO.dll
    • System.dll, System.Reflection.dll,
      
      System.Globalization.dll,
      
      
    • System.Drawing.dll, System.Assembly.dll,
      
      System.Text.dll
17. An .ASHX file contains the following
    • Code-behind that are used in the code
    • Server Controls that can be called from a code-behind file
    • HTTP handlers-software modules that handle raw HTTP requests received by ASP.NET
    • Contains normal ASP.NET code and can be used as an include file
18. What is the output for the following code snippet:
    
    

    public class testClass
    
    {
    
    	public static void Main(string[] args)
    
    	{
    
    		System.Console.WriteLine(args[1]);
    
    	}//end Main
    
    }//end class testClass

    • Compiler Error
    • Runtime Error
    • Hello C# world
    • None of the above
19. One of the possible way of writing an ASP.NET handler that works like an ISAPI filter- that is, that sees requests and responses and modifies them also, is by,
    • writing a module that extends FormsAuthenticatonModule and using it
    • writing a component class that extends HttpModuleCollection and using it
    • writing an HTTP module-a Class that implements IhttpModule and registering it in Web.Config
    • All of the above
20. The ASP.NET directive that lets you cache different versions of a page based on varying input parameters, HTTP headers and browser type is
    • @OutputCache
    • @CacheOutput
    • @PageCache
    • @CacheAll
21. If we develop an application that must accommodate multiple security levels through secure login and ASP.NET web application is spanned across three web-servers (using round-robin load balancing) what would be the best approach to maintain login-in state for the users?
    • <SessionState mode="InProc"stateConnectionString=" tcpip=127.0.0.1:42424" sqlConnectionString=" data source=127.0.0.1;user id=sa;password="cookieless="false" timeout="30" />
    • <SessionState mode="OutProc" stateConnectionString="tcpip=127.0.0.1:42424" sqlConnectionString="data source=127.0.0.1;user id=sa;password=" cookieless="false" timeout="30" />
    • <SessionState mode="stateserver" stateConnectionString="tcpip=127.0.0.1:42424" sqlConnectionString="data source=127.0.0.1;user id=sa;password=" cookieless="false" timeout="30" />
22. What is the output for the below mentioned compilation command>csc /addmodule:A.Exe B.Cs
    • A.exe
    • B.exe
    • A.dll
    • B.dll
23. How can be the web application get configured with the following authorization rules
    • Anonymous users must not be allowed to access the application.
    • All persons except David and John must be allowed to access the application.
    • <authorization>authorization>
    • <authorization>authorization>
    • <authorization>authorization>
    • <authorization>authorization>
24. What will be the output of the following code snippet?
    
    

    using System;
    
    class MainClass
    
    {
    
    	static void Main( )
    
    	{
    
    		new MainClass().Display( 3.56 );
    
    	}
    
    
    
    	private void Display( float anArg )
    
    	{
    
    		Console.Write( “{0} {1}”, anArg.GetType(), anArg );
    
    	}
    
    
    
    	double Display( double anArg )
    
    	{
    
    		Console.Write( “{0} {1}”, anArg.GetType(), anArg );
    
    		return anArg;
    
    	}
    
    
    
    	public decimal Display( decimal anArg )
    
    	{
    
    		Console.Write( “{0} {1}”, anArg.GetType(), anArg ); return anArg;
    
    	}
    
    }
    
    

    • System.Single 3.56
    • System.Float 3.56
    • System.Double 3.56
    • System.Decimal 3.56
25. What will be output for the given code?
    
    

    Dim I as integer = 5
    
    Do
    
    	I = I + 2
    
    	Response.Write (I & " ")
    
    Loop Until I > 10
    
    

    • 5 8
    • 5 7 9
    • 7 9 11
    • Errors out