You work as the developer in an IT company. Recently your company has a big customer. The customer is a large international compay. You're appointed to provide technical support for the customer. Now according to the customer requirement, you create the following Web user control named ErrorMessages.
<%@ Control Language="C#" AutoEventWireup="true"
CodeFile="ErrorMessages.ascx.cs"
Inherits="ErrorMessages" %>
<script language="C#" runat="server">
protected string m_Text = "This is a default message!";
public string Text {
get{ return m_Text;}
set{ m_Text = value;}
}
</script>
The ErrorMessages control uses a public property. The public property displays the error message.
On the Web Form in which the control is implemented, you have to change the default error message property.
In the options below, which code segment should you use?

• A. <fabrikam:Message id="MyMessage" MyMessage-Text="This is a custom message!" runat="server"/>
• B. <fabrikam:Message id="MyMessage" MessageText="This is a custom message!" runat="server"/>
• C. <fabrikam:Message id="MyMessage" Text="This is a custom message!" runat="server"/>
• D. <fabrikam:Message id="MyMessage" Message_Text="This is a custom message!" runat="server"/>

You work as the developer in an IT company. Recently your company has a big client. The client runs a large supermarket chain. According to the business requirement, the client needs a class which uses unmanaged resources. This class maintains references to managed resources on other objects. You must make sure that when the class instance is not needed, users of this class can explicitly release resources. What should you do? (choose more than one)

• A. Create a Dispose method that releases unmanaged resources and calls methods on other objects to release the managed resources.
• B. You should create a Dispose method. The method forces garbage collection by calling System.GC.Collect.
• C. You should create a class destructor. The class destructor releases the unmanaged resources.
• D. You should make the class implement the IDisposable interface by defining it.
• E. You should create a class destructor. The class destructor releases the managed resources by calling methods on other objects.
• F. You should make the class inherit from the WeakReference class by defining it.

You work as the developer in an IT company. Recently your company has a big customer. The customer runs a large supermarket chain. You're appointed to provide technical support for the customer. Now you are creating an application. No body can run the application except members of the Administrator group are allowed to run it by using the credentials of the end user. You protect sensitive data within the application by writing the following security code.
bool isAdmin = false;
WindowsBuiltInRole role = WindowsBuiltInRole.Administrator;
...
if (!isAdmin)
throw new Exception("User not permitted");
In order to make sure that if a user who is not a member of the Administrator group runs the apllication, the application throws an exception, a code segment should be added to this security code.
In the options below, which code segment should you use?

• A. WindowsIdentity currentUser = WindowsIdentity.GetCurrent();foreach (IdentityReference grp in currentUser.Groups) { NTAccount grpAccount = ((NTAccount)grp.Translate(typeof(NTAccount))); isAdmin = grp.Value.Equals(role); if (isAdmin) break;}
• B. WindowsPrincipal currentUser = (WindowsPrincipal)Thread.CurrentPrincipal;isAdmin = currentUser.IsInRole(role);
• C. WindowsIdentity currentUser = (WindowsIdentity)Thread.CurrentPrincipal.Identity;isAdmin = currentUser.Name.EndsWith("Administrator");
• D. GenericPrincipal currentUser = (GenericPrincipal) Thread.CurrentPrincipal;isAdmin = currentUser.IsInRole(role.ToString());

You work as the developer in an IT company. Recently your company has a big customer. The customer runs a large supermarket chain. You're appointed to provide technical support for the customer. Now according to the customer requirement, you create a Web Form which calls a method as part of its processing. It takes a long time for the method to process. Besides this, you notice that the other Web Forms in the ASP.NET Web site are now processing slowly. You have to execute the long running method in parallel to other requests to reduce the page response times. So what should you do?

• A. You have to set the CompilationMode attribute to Always inside the page directive of the Web Form that calls the method.
• B. You have to set the Async attribute to True inside the page directive of the Web Form that calls the method.
• C. You have to call the method within the PreInit and PreRenderComplete page events.
• D. You have to call the method by using the BeginGetAysncData and EndGetAsyncData delegates.