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Microsoft TS: Accessing Data with Microsoft .NET Framework 4 Sample Questions:

1. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
The application connects to two different Microsoft SQL Server 2008 database servers named Server1 and
Server2.
A string named sql1 contains a connection string to Server1. A string named sql2 contains a connection
string to Server2.
01 using (TransactionScope scope = new
02 ...
03 )
04 {
05 using (SqlConnection cn1 = new SqlConnection(sql1))
06 {
07 try{
08 ...
09 }
10 catch (Exception ex)
11 {
12 }
13 }
14 scope.Complete();
15 }
You need to ensure that the application meets the following requirements:
-There is a SqlConnection named cn2 that uses sql2.
-The commands that use cn1 are initially enlisted as a lightweight transaction.
The cn2 SqlConnection is enlisted in the same TransactionScope only if commands executed by cn1 do not
throw an exception.
What should you do?

A) Insert the following code segment at line 02.
TransactionScope(TransactionScopeOption.RequiresNew)
Insert the following code segment at line 08.
cn1.Open();
...
using (SqlConnection cn2 = new SqlConnection(sql2))
{
try
{
cn2.Open();
...
}
catch (Exception ex){}
}
B) Insert the following code segment at line 02.
TransactionScope(TransactionScopeOption.RequiresNew)
Insert the following code segment at line 08.
using (SqlConnection cn2 = new SqlConnection(sql2)) {
try{
cn2.Open();
...
cn1.Open();
...
}
catch (Exception ex){}
}
C) Insert the following code segment at line 02.
TransactionScope(TransactionScopeOption.Suppress)
Insert the following code segment at line 08.
using (SqlConnection cn2 = new SqlConnection(sql2))
{
try
{
cn2.Open();
...
cn1.Open();
...
}
catch (Exception ex){}
}
D) Insert the following code segment at line 02.
TransactionScope(TransactionScopeOption.Suppress)
Insert the following code segment at line 08.
cn1.Open();
...
using (SqlConnection cn2 = new SqlConnection(sql2))
{
try
{
cn2.Open();
...
}
catch (Exception ex){}
}

2. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create a Windows
Communication Foundation (WCF) Data Services service.
The service connects to a Microsoft SQL Server 2008 database. The service is hosted by an Internet
Information Services (IIS) 6.0 Web server.
The application works correctly in the development environment. However, when you connect to the service
on
the production server, attempting to update or delete an entity results in an error.
You need to ensure that you can update and delete entities on the production server. What should you do?

A) Configure IIS to allow the PUT and DELETE verbs for the .svc Application Extension.
B) Add the following line of code to the InitializeService method of the service: config.SetEntitySetAccessRule ("*", EntitySetRights.WriteDelete | EntitySetRights.WriteInsert);
C) Configure IIS to allow the POST and DELETE verbs for the .svc Application Extension.
D) Add the following line of code to the InitializeService method of the service: config.SetEntitySetAccessRule ("*", EntitySetRights.WriteDelete | EntitySetRights.WriteMerge);

3. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
You deploy a Windows Communication Foundation (WCF) Data Service to a production server.
The application is hosted by Internet Information Services (IIS).
After deployment, applications that connect to the service receive the following error message:
"The server encountered an error processing the request. See server logs for more details."
You need to ensure that the actual exception data is provided to client computers. What should you do?

A) Modify the application's Web.config file. Set the value for the customErrors element to Off.
B) Modify the application's Web.config file. Set the value for the customErrors element to RemoteOnly.
C) Add the ServiceBehavior attribute to the class that implements the data service.
D) Add the FaultContract attribute to the class that implements the data service.

4. You use Microsoft Visual studio 2010 and Microsoft NET Framework 4.0 to create an application.
The application uses the ADO.NET Entity Framework to model entities. The model includes the entity
shown in the following exhibit:

You need to add a function that returns the number of years since a person was hired.
You also need to ensure that the function can be used within LINQ to Entities queries. What should you do?

A) //Add the following conceptual model function returns the number of years since an instructor was hired
<Function Name="YearsSince" ReturnType="Edm.Int32">
<Parameter Name="date" Type="Edm.DateTime" />
<DefiningExpression>
Year(CurrentDateTime()) -Year(date)
</DefiningExpression>
</Function>
// add the following method to your application and use an EdmFunctionAttribute to map it to the
conceptual model function:
[EdmFunction("SchoolModel", "YearsSince")]
public static int YearsSince(DateTime date){
return CurrentDateTime() -Year(date);
}
B) //Add the following conceptual model function returns the number of years since an instructor was hired
<Function Name="YearsSince" ReturnType="Edm.Int32">
<Parameter Name="date" Type="Edm.DateTime" />
<DefiningExpression>
YearsSince(DateTime date)
</DefiningExpression>
</Function>
// add the following method to your application and use an EdmFunctionAttribute to map it to the
conceptual model function:
[EdmFunction("SchoolModel", "YearsSince")]
public static int YearsSince(DateTime date){
return CurrentDateTime() -Year(date);
}
C) //Add the following conceptual model function returns the number of years since an instructor was hired
<Function Name="YearsSince" ReturnType="Edm.Int32">
<Parameter Name="date" Type="Edm.DateTime" />
<DefiningExpression>
Year(CurrentDateTime()) -Year(date)
</DefiningExpression>
</Function>
// add the following method to your application and use an EdmFunctionAttribute to map it to the
conceptual model function:
[EdmFunction("SchoolModel", "YearsSince")] public static int YearsSince(DateTime date){ throw new NotSupportedException("Direct calls are not supported."); }
D) Use the Entity Data Model Designer to create a complex property named YearsSinceNow that can be accessed throuqh the LINQ to Entites query at a Later time

5. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
The application uses the ADO.NET Entity Framework to model entities.
You define a Category class by writing the following code segment. (Line numbers are included for
reference only.)
01 public class Category
02 {
03 public int CategoryID { get; set; }
04 public string CategoryName { get; set; }
05 public string Description { get; set; }
06 public byte[] Picture { get; set; }
07 ...
08 }
You need to add a collection named Products to the Category class. You also need to ensure that the
collection supports deferred loading.
Which code segment should you insert at line 07?

A) protected List <Product> Products { get; set; }
B) public virtual List <Product> Products { get; set; }
C) public static List <Product> Products { get; set; }
D) public abstract List <Product> Products { get; set; }

Solutions: