You need to design a deployment solution for the rewritten Web application. Which approach should you recommend?

• A. Use DB Deployment and One-Click Publishing.
• B. Use MSDeploy and FTP.
• C. Use MSDeploy and One-Click Publishing.
• D. Use DB Deployment and FTP.

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. 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();
  }
• B. 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();
  }
• C. Insert the following code segment at line 04. private SqlConnection conn = new SqlConnection(connString); public void Open(){
  conn.Open();
  }
  public void Close(){
  conn.Close();
  }
• D. Insert the following code segment at line 07. using (SqlConnection conn = new SqlConnection(connString)){
  conn.Open();
  }

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. You use the ADO.NET Entity Data Model (EDM) to define a Customer entity. You need to add a new Customer to the data store without setting all the customer's properties. What should you do?

• A. Call the CreateObject method of the Customer object.
• B. Override the SaveChanges method for the Customer object.
• C. Override the Create method for the Customer object.
• D. Call the Create method of the Customer object.

You are designing an ASP.NET Web application.
You have the following requirements:
*Users must be allowed to save their work in progress on one computer and to continue the work on
another computer.
*Data that is submitted for processing must be valid, and invalid data must be rejected.
*Primary key constraints within the database must be enabled at all times.
*The application must store only data that is entered by the user.
You need to design data validation to support the requirements.
Which two approaches should you recommend? (Each correct answer presents part of the solution.
Choose two.)

• A. Provide default values for the database columns, and submit the form with user-entered values when the user saves the form.
• B. Use validators to verify the data when the user submits a form.
• C. Store temporary form data as XML in a database table.
• D. Add an isTemporary column to each database table, and set all columns to allow null values.

You are adding a Windows Communication Foundation (WCF) service to an existing application. The
application is configured as follows. (Line numbers are included for reference only.)
01 <configuration>
02 <system.serviceModel>
03 <services>
04 <service name="Contoso.Sales.StockService"
05 behaviorConfiguration="MetadataBehavior">
06 <host>
07 <baseAddresses>
08 <add baseAddress="http://contoso.com:8080/StockService" />
09 </baseAddresses>
10 </host>
11 </service>
12 </services>
13 <behaviors>
14 <serviceBehaviors>
15 <behavior name="MetadataBehavior">
16 </behavior>
17 </serviceBehaviors>
18 </behaviors>
You need to configure the service to publish the service metadata.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

• A. Add the following XML segment between lines 15 and 16 <serviceMetadata httpGetEnabled="true"/>
• B. Add the following XML segment between lines 10 and 11. <endpoint address="" binding="mexHttpBinding" contract="IMetadataExchange"
  />
• C. Add the following XML segment between lines15 and 16. <serviceDiscovery> <announcementEndpoints> <endpoint address=""/>
  </announcementEndpoints>
  </serviceDiscovery>
• D. Add the following XML segment between lines 10 and 11. <endpoint address="" binding="basicHttpBinding" contract="IMetadataExchange"
  />