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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 develop an application that
uses the Entity Framework.
The application defines the following Entity Data Model.

Within the .edmx file, the following function is defined:
<Function Name="Round" ReturnType="Decimal"> <Parameter Name="val" Type="Decimal" /> <DefiningExpression>
CAST(val as Edm.Int32) </DefiningExpression> </Function>
The application includes the following LINQ query.
var query = from detail in context.SalesOrderDetails select detail.LineTotal.Round();
You need to ensure that the Round function executes on the database server when the query is executed. Which code segment should you use?

A) public static class DecimalHelper
{
public static SqlDecimal Round(this Decimal input)
{
return SqlDecimal.Round(input, 0);
}
}
B) public static class DecimalHelper
{
[EdmFunction("Edm", "Round")]
public static Decimal Round(this Decimal Amt)
{
throw new NotSupportedException();
}
}
C) public static class DecimalHelper
{
[EdmFunction("SqlServer", "Round")]
public static Decimal Round(this Decimal Amt)
{
throw new NotSupportedException();
}
}
D) public static class DecimalHelper
{
public static Decimal Round(this Decimal input)
{
return (Decimal)(Int32)input;
}
}

2. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
You use the ADO.NET Entity Framework to model your entities.
The application connects to a Microsoft SQL Server 2008 database named AdventureWorks by using
Windows Authentication.
Information about the required Entity Data Model (EDM) is stored in the following files:
-model.csdl
-model.ssdl
-model.msl
These files are embedded as resources in the MyCompanyData.dll file.You need to define the connection
string
that is used by the application. Which connection string should you add to the app.config file?

A) <add name="AdventureWorksEntities" connectionString="metadata=res://MyComparny.Datamodel.csdl| res://MyCompany.Data.model.ssdl| res://MyCompany.Data.model.msl; provider=System.Data.SqlClient; provider connection string='DataSource=localhost;Initial Catalog=AdventureWorks;lntegrated
Security=SSPI;multipleactivesuitsets=true'"
providerName="System.Data.EntityClient"/>
B) <add name="AdventureWorksEntities" connectionString="metadata=res://MyComparny.Data,Culture=neutral,PublicKeyToken=null/
model.csdIl res://MyCompany.Data,Culture=neutral, PublicKeyToken=null/model.ssdl| res://MyCompany.Data,Culture=neutral, PublicKeyToken=null/model.msl; provider=System.Data.EntityClient; provider connection string='DataSource=localhost;Initial Catalog=AdventureWorks;lntegrated
Security=True;multipleactivesuitsets=true'"
providerName="System.Data.SqlClient"/>
C) <add name="AdventureWorksEntities" connectionString="metadata=res://MyComparny.Data,Culture=neutral,PublicKeyToken=null/
model.csdIl
res://MyComparny.Data,Culture=neutral,PublicKeyToken=null/model.ssdIl
res://MyComparny.Data,Culture=neutral,PublicKeyToken=null/model.msl;
provider=System.Data.OleDBClient;
provider connection string='Provider=sqloledb;DataSource=localhost;Initial
Catalog=AdventureWorks;lntegrated Security=SSPI;multipleactivesuitsets=true'"
providerName="System.Data.EntityClient"/>
D) <add name="AdventureWorksEntities" connectionString="metadata=res://MyComparny.Data,Culture=neutral,PublicKeyToken=null/
model.csdIl res://MyCompany.Data,Culture=neutral, PublicKeyToken=null/model.ssdl| res://MyCompany.Data,Culture=neutral, PublicKeyToken=null/model.msl; provider=System.Data.SqlClient; provider connection string='DataSource=localhost;Initial Catalog=AdventureWorks;lntegrated
Security=True;multipleactivesuitsets=true'"
providerName="System.Data.EntityClient"/>

3. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
You create a stored procedure to insert a new record in the Categories table according to following code
segment.
CREATE PROCEDURE dbo.InsertCategory @CategoryName navrchar(15),
@Identity int OUT
AS INSERT INTO Categories(CategoryName) VALUES (@CategoryName) SET @Identity = SCOPE_IDENTITY() RETURN @@ROWCOUNT
You add the following code fragment. (Line numbers are included for reference only.)
01 private static void ReturnIdentity(string connectionString)
02 {
03 using(SqlConnection connection = new SqlConnection(connectionString))
04 {
05 SqlDataAdpater adapter = new SqlDataAdapter("SELECT CategoryID,
CategoryName FROM dbo.Categories", connection);
06 adapter.InsertCommand = new SqlCommand("InsertCategory", connection);
07 adapter.InsertCommand.CommandType = CommandType.StoredProcedure;
08 SqlParameter rowcountParameter = adapter.InsertCommand.Parameters.Add
("@RowCount", SqlDbType.Int);
09 ...
10 adapter.InsertCommand.Parameters.Add("@CategoryName", SqlDbType.NChar,
15, "CategoryName");
11 SqlParameter identityParameter = adapter.InsertCommand.Parameters.Add
("@Identity", SqlDbType.Int, 0, "CategoryID");
12 ...
13 DataTable categories = new DataTable();
14 adapter.Fill(categories);
15 DataRow ctegoryRow = categories.NewRow();
16 categoryRow["CategoryName"] = "New beverages";
17 categories.Rows.Add(categoryRow);
18 adapter.Update(categories);
19 Int32 rowCount = (Int32)adapter.InsertCommand.Parameters
["@RowCount"].Value;
20 }
21 }
Which code elements needs to be added in the empty lines?

A) Insert the following code segment at line 09:
rowcountParameter.Direction = ParameterDirection.Output;
Insert the following code segment at line 12:
identityParameter.Direction = ParameterDirection.ReturnValue;
B) Insert the following code segment at line 09:
rowcountParameter.Direction = ParameterDirection.Output;
Insert the following code segment at line 12:
identityParameter.Direction = ParameterDirection.Output;
C) Insert the following code segment at line 09:
rowcountParameter.Direction = ParameterDirection.ReturnValue;
Insert the following code segment at line 12:
identityParameter.Direction = ParameterDirection.Output;
D) Insert the following code segment at line 09:
rowcountParameter.Direction = ParameterDirection.ReturnValue;
Insert the following code segment at line 12:
identityParameter.Direction = ParameterDirection.ReturnValue;

4. Refer to the following lines in the case study: PA40 in \Model\Part.cs, PR16 in\Model\Product.cs, and CT14 in \Model\Component.cs
The application must create XML files that detail the part structure for any product. The XML files must use the following format:
<?xml version="1.0" encoding="utf-8"?>
<product name="Brush" description="Brush product" productType="1">
<component name="Handle" description="Handle" partType="2">
<component name="Screw" description="Screw" partType="3">
<component name="Wood" description="Wooden shaft" partType="45">
</component>
<component name="Head" description="Head" partType="5">
<component name="Screw" description="Screw" partType="3">
<component name="Bristles" description="Bristles" partType="4">
</component> </product>
You need to update the application to support the creation of an XElement object having a structure that will
serialize to the format shown above.
What should you do? (Each correct answer presents part of the solution. Choose two.)

A) Insert the following code segment at line CT14 in \Model\Component.cs:
return new XElement("component, new XElement("name", this.Name),
new XElement("description", this.Description),
new XElement("partType", this.PartType));
B) Insert the following code segment at line PR16 in \Model\Product.cs:
return new XElement("product, new XElement("name", this.Name),
new XElement("description", this.Description),
new XElement("productType", this.ProductType));
C) Insert the following code segment at line CT14 in \Model\Component.cs:
return new XElement("component, new XAttribute("name", this.Name),
new XElement("description", this.Description),
new XElement("partType", this.PartType));
D) Insert the following code segment at line CT14 in \Model\Component.cs:
return new XElement("component, new XAttribute("name", this.Name),
new XAttribute("description", this.Description),
new XAttribute("partType", this.PartType));
E) Insert the following code segment at line PR16 in \Model\Product.cs:
return new XElement("product, new XAttribute("name", this.Name),
new XElement("description", this.Description),
new XElement("productType", this.ProductType));
F) Insert the following code segment at line PR16 in \Model\Product.cs:
return new XElement("product, new XAttribute("name", this.Name),
new XAttribute("description", this.Description),
new XAttribute("productType", this.ProductType));

5. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application. You use the Entity Framework Designer to create an Entity Data Model using model-first development.
The database has the following requirements:
-each table must have a datetime column named time_modified
-each table requires a trigger that updates the value of the time_modified column when a row is inserted or updated
You need to ensure that the database script that is created by using the Generate Database From Model
option meets the requirements.
What should you do?

A) Add a new entity named time_modified to the model, and modify each existing entity so that it inherits from the new entity.
B) Create a new Windows Workflow Foundation workflow, and set Database Generation Workflow to the name of the new workflow.
C) Add a DateTime property named time_modified to each entity in the model and set the property's StoreGeneratedPattern to Computed.
D) Create a new T4 template, and set the DDL Generation template to the name of the new template.

Solutions: