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

1. 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 (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);
}
B) 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);
}
C) 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);
}
D) 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);
}

2. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. You are
creating the data layer of the application. You write the following code segment. (Line numbers are included
for reference only.)
01 public static SqlDataReader GetDataReader(string sql){
02 SqlDataReader dr;
03
04 return dr;
05 }
You need to ensure that the following requirements are met:
*The SqlDataReader returned by the GetDataReader method can be used to retrieve rows from the
database.
*SQL connections opened within the GetDataReader method will close when the SqlDataReader is closed.
Which code segment should you insert at line 03?

A) SqlConnection cnn=new SqlConnection(strCnn); SqlCommand cmd =new SqlCommand(sql, cnn); cnn.Open(); try {
dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch {
cnn.Close();
throw;
}
B) SqlConnection cnn=new SqlConnection(strCnn); SqlCommand cmd =new SqlCommand(sql, cnn); cnn.Open(); try {
dr = cmd.ExecuteReader();
cnn.Close();
}
catch {
throw;
}
C) SqlConnection cnn=new SqlConnection(strCnn); SqlCommand cmd =new SqlCommand(sql, cnn); cnn.Open(); try {
dr = cmd.ExecuteReader();
}
finally {
cnn.Close();
}
D) using (SqlConnection cnn=new SqlConnection(strCnn)){
try {
SqlCommand cmd =new SqlCommand(sql, cnn);
cnn.Open();
dr = cmd.ExecuteReader();
}
catch {
throw;
}
}

3. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application.
The application contains the following code segment. (Line numbers are included for reference only.)
01 class DataAccessLayer
02 {
03 private static string connString;
04
05 ...
06 public static DataTable GetDataTable(string command){
07
08 ...
09 }
10 }
You need to define the connection life cycle of the DataAccessLayer class. You also need to ensure that
the application uses the minimum number of connections to the database.
What should you do?

A) Insert the following code segment at line 07. using (SqlConnection conn = new SqlConnection(connString)){
conn.Open();
}
B) Insert the following code segment at line 04. private SqlConnection conn = new SqlConnection(connString); public void Open(){
conn.Open();
}
public void Close(){
conn.Close();
}
C) Insert the following code segment at line 04. private static SqlConnection conn = new SqlConnection(connString); public static void Open(){
conn.Open();
}
public static void Close(){
conn.Close();
}
D) Replace line 01 with the following code segment.
class DataAccessLayer : IDisposable
Insert the following code segment to line 04.
private SqlConnection conn = new SqlConnection(connString);
public void Open(){
conn.Open();
}
public void Dispose(){
conn.Close();
}

4. You are designing an ASP.NET Web application that displays daily sales information. The sales
information is stored in a large Microsoft SQL Server database. The database information is updated each
night. During the day, people use the Web application to display a set of standard sales reports based on
the latest database information.
The SQL queries that are required to retrieve the database information can take from 20 to 30 seconds to
execute.
You need to design the application to ensure that pages usually load in no more than 5 seconds.
Which two approaches could you recommend? (Each correct answer presents a complete solution.
Choose two.)

A) Use AJAX to retrieve the database information.
B) Use a service that proxies the database queries and caches the results.
C) Use SQL Server replication.
D) Use a control that retrieves and displays the database information.

5. You need to design a solution for capturing an exception. Which approach should you recommend?

A) Use a HandleError attribute.
B) Use an Application_Error method.
C) Use a customErrors element.
D) Use a Page_Error method.

Solutions: