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Microsoft UPG:Transition MCPD.NET Frmwrk 3.5 Web Dev to 4 Web Dev Sample Questions:

1. You are implementing an ASP.NET page. Client-side script requires data. Your application includes a class
named Person with a Name property of type string. The code-behind file of the page includes the following
code segment.
public string JsonValue;
List<Person> people = GetPeopleList();
JavaScriptSerializer json = new JavaScriptSerializer();
You need to use the JavaScriptSerializer class to serialize only the Name property of each item in the
people list.
Which code segment should you use?

A) JsonValue = json.Serialize(people.SelectMany( p => Name.AsEnumerable())); var names = from person in people select person; JsonValue = json.Serialize(names);
B) JsonValue = json.Serialize(people.Select(p => p.Name)); var names = from person in people select person; JsonValue = "{" + json.Serialize(names) + "}";

2. You are implementing an ASP.NET AJAX page that contains two div elements. You need to ensure that the
content of each div element can be refreshed individually, without requiring a page refresh.
What should you do?

A) Add a form and two update panels to the page. Add a script manager to the form. Add a content template to each update panel, and move a div element into each content template.
B) Add a form and two update panels to the page. Add two script managers to the form, one for each update panel. Add a content template to each update panel, and move each div element into a content template.
C) Add two forms to the page. Add a script manager and an update panel to each form. Add a content template to each update panel, and move each div element into a content template.
D) Add two forms to the page. Add a script manager and an update panel to each form. Add a content template to each update panel, and move each div element into a content template.

3. You are developing an application to update a user's social status. You need to consume the service using
Windows Communication Foundation (WCF).
The client configuration is as follows.
<system.serviceModel>
<bindings>
<webHttpBinding>
<binding name="SocialConfig">
<security mode="TransportCredentialOnly">
<transport clientCredentialType="Basic"
?realm="Social API" />
</security>
</binding>
</webHttpBinding>
</bindings>
<client>
<endpoint address="http://contoso.com"
binding="webHttpBinding"
bindingConfiguration="SocialConfig"
contract="ISocialStatus"
name="SocialClient" />
</client> </system.serviceModel> The service contract is defined as follows. [ServiceContract] public interface ISocialStatus {
[OperationContract]
[WebInvoke(UriTemplate =
"/statuses/update.xml?status={text}")]
void UpdateStatus(string text); } Which code segment should you use to update the social status?

A) using (ChannelFactory<ISocialStatus> factory = new ChannelFactory<ISocialStatus>("POST")) { factory.Credentials.Windows.ClientCredential.UserName = user.Name; factory.Credentials.Windows.ClientCredential.SecurePassword. SetAt(0, Convert.ToChar(user.Password)); ISocialStatus socialChannel = factory.CreateChannel();
socialChannel.UpdateStatus(newStatus);
}
B) using (WebChannelFactory<ISocialStatus> factory = new WebChannelFactory<ISocialStatus>("SocialClient"))
{
factory.Credentials.UserName.UserName = user.Name;
factory.Credentials.UserName.Password = user.Password;
ISocialStatus socialChannel = factory.CreateChannel();
socialChannel.UpdateStatus(newStatus);
}
C) using (ChannelFactory<ISocialStatus> factory =
new WebChannelFactory<ISocialStatus>(typeof(ISocialStatus)))
{
factory.Credentials.UserName.UserName = user.Name;
factory.Credentials.UserName.Password = user.Password;
ISocialStatus socialChannel = factory.CreateChannel();
socialChannel.UpdateStatus(newStatus);
}
D) using (WebChannelFactory<ISocialStatus> factory = new WebChannelFactory<ISocialStatus>(typeof(ISocialClient))) { factory.Credentials.Windows.ClientCredential.UserName = user.Name; factory.Credentials.Windows.ClientCredential.SecurePassword. SetAt(0, Convert.ToChar(user.Password)); ISocialStatus socialChannel = factory.CreateChannel();
socialChannel.UpdateStatus(newStatus);
}

4. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The
application connects to a Microsoft SQL Server database. The application uses the following object query
to load a product from the database. (Line numbers are included for reference only.)
01using (AdventureWorksEntities advWorksContext = new AdventureWorksEntities())
02{
03ObjectQuery <Product> productQuery = advWorksContext.Product.Where("it.ProductID = 900");
04
05}
You need to log the command that the query executes against the data source. Which code segment
should you insert at line 04?

A) Trace.WriteLine(productQuery.ToString());
B) Trace.WriteLine(productQuery.ToTraceString());
C) Trace.WriteLine(productQuery.CommandText);
D) Trace.WriteLine(((IQueryable)productQuery).Expression);

5. You create an ASP.NET page named TestPage.aspx that contains validation controls. You need to verify that all input values submitted by the user have been validated by testing the Page.IsValid property. Which page event should add an event handler to?

A) Init
B) Load
C) PreInit
D) PreLoad

Solutions: