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

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

2. A Windows Communication Foundation (WCF) service has a callback contract.
You are developing a client application that will call this service.
You must ensure that the client application can interact with the WCF service.
What should you do?

A) On the client, create a proxy derived from DuplexClientBase<TChannel>.
B) On the client, use GetCallbackChannel<T>.
C) On the OperationContractAttribute, set the ReplyAction property value to the endpoint address of the client.
D) On the OperationContractAttribute, set the AsyncPattern property value to True.

3. 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 a DataTable named
OrderDetailTable that has the following columns: "ID "OrderID "ProductID "Quantity "LineTotal Some
records contain a null value in the LineTotal field and 0 in the Quantity field. You write the following code
segment. (Line numbers are included for reference only.)
01DataColumn column = new DataColumn("UnitPrice", typeof(double));
02
03OrderDetailTable.Columns.Add(column);
You need to add a calculated DataColumn named UnitPrice to the OrderDetailTable object. You also need
to ensure that UnitPrice is set to 0 when it cannot be calculated. Which code segment should you insert at
line 02?

A) column.Expression = "iif(Quantity > 0, LineTotal/Quantity, 0)";
B) column.Expression = "LineTotal/ISNULL(Quantity, 1)";
C) column.Expression = "LineTotal/Quantity";
D) column.Expression = "if(Quantity > 0, LineTotal/Quantity, 0)";

4. You deploy an ASP.NET application to an IIS server.
You need to log health-monitoring events with severity level of error to the Windows application event log.
What should you do?

A) Add the following rule to the <healthMonitoring/> section of the web.config file. <rules> <add name="Errors" eventName="All Errors" provider="EventLogProvider" /> </rules>
B) Run the aspnet_regiis.exe command.
C) Set the Treat warnings as errors option to All in the project properties and recompile.
D) Add the following rule to the <healthMonitoring/> section of the web.config file. <rules> <add name="Failures"
eventName="Failure Audits"
provider="EventLogProvider" />
</rules>

5. You create a page in an ASP.NET Web application. The page retrieves and displays data from a Microsoft SQL Server database. You need to create a data source that can connect to the database. What are two possible ways to achieve this goal? (Each correct answer presents a complete solution. Choose two.)

A) Use an XmlDataSource control together with an Xml control that represents the database.
B) Use a SqlDataSource control and configure its ConnectionString in the web.config file.
C) Use an ObjectDataSource control and set its TypeName property to System.Data.SqlClient. SqlConnection.
D) Use a LinqDataSource control with entity classes that represent the elements in the database.

Solutions: