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Microsoft 70-516

TS: Accessing Data with Microsoft .NET Framework 4

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    Microsoft 70-516 (TS: Accessing Data with Microsoft .NET Framework 4)

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70-516 Questions and Answers

70-516


QUESTION: 310

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The application contains the following XML document.

< feed >

< title > Products < /title >

< entry >

< title > Entry title 1 < /title >

< author > Author1 < /title >

< content >

< properties >

< description > some description < /description >

< n otes > some notes < /notes >

< comments > some comments < /comments >

< /properties >

< /content >

< /entry >

...

< /feed >

You plan to add localization features to the application. You add the following code segment. (Line numbers are included for reference only.)

01Public Function GetTextNodesForLocalization(doc As XDocument) As IEnumerable(Of XNode)

02

03Return From n In nodes _

04Where n.NodeType = XmlNodeType.Text _ 05 Select n

06End Function

You need to ensure that the GetTextNodesForLocalization method returns all the XML text nodes of the document. Which code segment should you insert at line 02?


  1. Dim nodes As IEnumerable(Of XNode) = doc.Descendants()

  2. Dim nodes As IEnumerable(Of XNode) = doc.Nodes()

  3. Dim nodes As IEnumerable(Of XNode) = doc.DescendantNodes()

  4. Dim nodes As IEnumerable(Of XNode) = doc.NodesAfterSelf()


Answer: C


QUESTION: 311

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to develop an application that uses the Entity Framework. The application has an entity model that includes SalesTerritory and SalesPerson entities as shown in the following diagram.


You need to calculate the total bonus for all sales people in each sales territory. Which code segment should you use?


  1. From territory In model.SalesTerritories Group Join person In model.SalesPersons On _ person.SalesTerritory Equals territory

    Into territoriesByPerson = Group Select New With {

    .SalesTerritory = territory.Name,

    .TotalBonus = territoriesByPerson.Sum(Function(p) p.Bonus)

    }

  2. From territory In model.SalesTerritories Group territory By territory.SalesPersons Into personByterritories = Group _

    Select New With

    {

    .SalesTerritory = personByterritories,

    .TotalBonus = personByterritories.Sum(Function(person) _ person.SalesPersons(0).Bonus)

    }

  3. model.SalesPersons. _ GroupBy(Function(person) person.SalesTerritory). _ SelectMany(Function(group) group.Key.SalesPersons). _ Sum(Function(person) person.Bonus)

  4. model.SalesTerritories. _ GroupBy(Function(territory) territory.SalesPersons). _ SelectMany(Function(group) group.Key). _ Sum(Function(person) person.Bonus)


Answer: A


QUESTION: 312

You use Microsoft .NET Framework 4 to develop an application that connects to a Microsoft SQL Server 2008 database. You add the following table to the database. CREATE TABLE ObjectCache ( Id INT IDENTITY PRIMARY KEY,

SerializedObjectData XML )

You write the following code segment to retrieve records from the ObjectCache table. (Line numbers are included for reference only.)

01Dim s As String = GetConnectStringFromConfigFile("xmldb") 02Using conn As New SqlConnection(s)

03Using cmd As New SqlCommand( 04"select * from ObjectCache", conn)) 05

06conn.Open()

07Dim rdr As SqlDataReader = cmd.ExecuteReader() 08While rdr.Read()

09

10DeserializeObject(obj) 11End While

12End Using 13End Using

You need to retrieve the data from the SerializedObjectData column and pass it to a method named DeserializeObject. Which line of code should you insert at line 9?


  1. Dim obj As XmlReader = DirectCast(rdr(1), XmlReader)

  2. Dim obj As SByte = DirectCast(rdr(1), SByte)

  3. Dim obj As String = DirectCast(rdr(1), String)

  4. Dim obj As Type = rdr(1).GetType()


Answer: C


QUESTION: 313

You use Microsoft .NET Framework 4 to develop an application that uses LINQ to SQL. You create a data model named AdvWorksDataContext, and you add the Product table to the data model. The Product table contains a decimal column named ListPrice and a string column named Color. You need to update the ListPrice column where the product color is Black or Red. Which code segment should you use?


  1. Dim colorList() As String = New String() {"Black", "Red"} Dim dc As AdvWorksDataContext = New AdvWorksDataContext

    Dim prod = From p In dc.Products Where colorList.Contains(p.Color) Select p For Each product In prod

    product.ListPrice = product.StandardCost * 1.5 Next dc.SubmitChanges()

  2. Dim dc As AdvWorksDataContext = New AdvWorksDataContext( "& " ) Dim prod = From p In dc.Products

    Select p

    Dim list = prod.ToList()

    For Each product As Product In list

    If (product.Color = "Black,Red") Then product.ListPrice = product.StandardCost * 1.5 End If

    Next dc.SubmitChanges()

  3. Dim dc As AdvWorksDataContext = New AdvWorksDataContext( "& " ) Dim prod = From p In dc.Products Where p.Color = "Black,Red" Select p For Each product In prod

    product.ListPrice = product.StandardCost * 1.5 Next dc.SubmitChanges()

  4. Dim dc As AdvWorksDataContext = New AdvWorksDataContext( "& " ) Dim prod = From p In dc.Products

Select p

Dim list = prod.ToList()

For Each product As Product In list

If (product.Color = "Black") AndAlso (product.Color = "Red") Then product.ListPrice = product.StandardCost * 1.5 End If

Next dc.SubmitChanges()


Answer: A


QUESTION: 314

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 the ADO.NET Entity Framework to model entities. The database includes objects based on the exhibit. The application includes the following code segment. (Line numbers are included for reference only.)

01 using (AdventureWorksEntities context = new AdventureWorksEntities()){ 02

03 foreach (SalesOrderHeader order in customer.SalesOrderHeader){ 04Console.WriteLine(String.Format("Order: {0} ", order.SalesOrderNumber)); 05 foreach (SalesOrderDetail item in order.SalesOrderDetail){ 06Console.WriteLine(String.Format("Quantity: {0} ", item.Quantity)); 07Console.WriteLine(String.Format("Product: {0} ", item.Product.Name)); 08}

09}

10}

You want to list all the orders for a specified customer. You need to ensure that the list contains the following fields: "Order number "Quantity of products "Product name Which code segment should you insert at line 02?


  1. Contact customer = context.Contact.Where("it.ContactID = @customerId", new ObjectParameter ("@customerId", customerId)).First();

  2. Contact customer = context.Contact.Where("it.ContactID = @customerId", new ObjectParameter ("customerId", customerId)).First();

  3. context.ContextOptions.LazyLoadingEnabled = true; Contact customer = (From contact in context.Contact include("SalesOrderHeader.SalesOrderDetail") select conatct). FirstOrDefault();

  4. Contact customer = (From contact in context.Contact include("SalesOrderHeader") select conatct). FirstOrDefault();


Answer: B


QUESTION: 315

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. You use the ADO.NET Entity Framework to model entities. You write the following code segment. (Line numbers are included for reference only.)

01public partial class SalesOrderDetail : EntityObject 02{

03partial void OnOrderQtyChanging(short value) 04{

05

06{

07...

08}

09}

10}

You need to find out whether the object has a valid ObjectStateEntry instance. Which code segment should you insert at line 05?


  1. if (this.EntityState != EntityState.Detached)

  2. if (this.EntityState != EntityState.Unchanged)

  3. if (this.EntityState != EntityState.Modified)

  4. if (this.EntityState != EntityState.Added)


Answer: D


QUESTION: 316

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The application connects to a Microsoft SQL Server 2008 database. The database includes a table named dbo. Documents that contains a column with large binary dat a. You are creating the Data Access Layer (DAL). You add the following code segment to query the dbo.Documents table. (Line numbers are included for reference only.)

01public void LoadDocuments(DbConnection cnx) 02{

03var cmd = cnx.CreateCommand();

04cmd.CommandText = "SELECT * FROM dbo.Documents"; 05...

06cnx.Open(); 07

08ReadDocument(reader); }

You need to ensure that data can be read as a stream. Which code segment should you insert at line 07?


  1. var reader = cmd.ExecuteReader(CommandBehavior.Default);

  2. var reader = cmd.ExecuteReader(CommandBehavior.SchemaOnly);

  3. var reader = cmd.ExecuteReader(CommandBehavior.KeyInfo);

  4. var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess);


Answer: D


QUESTION: 317

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The application uses the ADO.NET Entity Framework to model entities. The application allows users to make changes while disconnected from the data store. Changes are submitted to the data store by using the SubmitChanges method of the DataContext object. You receive an exception when you call the SubmitChanges method to submit entities that a user has changed in offline mode. You need to ensure that entities changed in offline mode can be successfully updated in the data store. What should you do?


  1. Set the ObjectTrackingEnabled property of DataContext to true.

  2. Set the DeferredLoadingEnabled property of DataContext to true.

  3. Call the SaveChanges method of DataContext with a value of false.

  4. Call the SubmitChanges method of DataContext with a value of System.Data.Linq.ConflictMode. ContinueOnConflict.


Answer: A


QUESTION: 318

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The application contains the following XML fragment.

<ApplicationMenu>

<MenuItem name="File">

<MenuItem name="New">

<MenuItem name="Project" />

<MenuItem name="Web Site" />

</MenuItem>

<MenuItem name="Open">

<MenuItem name="Project" />

<MenuItem name="Web Site" />

</MenuItem>

<MenuItem name="Save" />

</MenuItem>

<MenuItem name="Edit">

<MenuItem name="Cut" />

<MenuItem name="Copy" />

<MenuItem name="Paste" />

</MenuItem>

<MenuItem name="Help">

<MenuItem name="Help" />

<MenuItem name="About" />

</MenuItem>

</ApplicationMenu>

The application queries the XML fragment by using the XmlDocument class. You need to select all the descendant elements of the MenuItem element that has its name attribute as File. Which XPath expression should you use?


  1. //*[@name='File'][name()='MenuItem']

  2. /ApplicationMenu/MenuItem['File']//MenuItem

  3. /ApplicationMenu/MenuItem/descendant::MenuItem['File']

  4. /ApplicationMenu/MenuItem[@name='File']/descendant::MenuItem


Answer: D


QUESTION: 319

You use Microsoft visual studio 2010 and Microsoft NET Framework 4 to create an application The application uses the ADO NFT 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?


  1. //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.");

    }

  2. //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);

    }

  3. //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);

    }

  4. 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


Answer: A


Reference:

msdn.microsoft.com/en-us/library/dd456857.aspx


QUESTION: 320

The database contains a table named Categories. The Categories table has a primary key identity column named CategoryID. The application inserts new records by using the following stored procedure.

CREATE PROCEDURE dbo.InsertCategory

@CategoryName nvarchar(15),

@Identity int OUT AS

INSERT INTO Categories (CategoryName) VALUES(@CategoryName) SET @Identity = SCOPE_IDENTITY()

RETURN @@ROWCOUNT

You write the following code segment.

SqlDataAdapter adapter = new SqlDataAdapter("SELECT categoryID, CategoryName FROMdbo.Categories",connection);

adapter.InsertCommand = new SqlCommand("dbo.InsertCategory", connection); adapter.InsertCommand.CommandType = commandType.StoredProcedure; adapter.InsertCommand.Parameters.Add(new SqlParameter("@CategoryName", SqlDbType. NVarChar, 15,"CategoryName"));

You need to retrieve the identity value for the newly created record. Which code segment should you add?


  1. SqlParameter parameter = adapter.InsertCommand.Parameters.Add("@CategoryName", SqlDbType.Int); parameter.Direction = ParameterDirection.Output;

    parameter = adapter.InsertCommand.Parameters.Add("@Identity", SqlDbType.Int, 0, "CategoryID");

    parameter.Direction = ParameterDirection.Output;

  2. SqlParameter parameter = adapter.InsertCommand.Parameters.Add("@CategoryName", SqlDbType.Int); parameter.Direction = ParameterDirection.Output;

    parameter = adapter.InsertCommand.Parameters.Add("@Identity", SqlDbType.Int, 0, "CategoryID");

    parameter.Direction = ParameterDirection.ReturnValue;

  3. SqlParameter parameter = adapter.InsertCommand.Parameters.Add("@RowCount", SqlDbType.Int);

    parameter.Direction = ParameterDirection.ReturnValue;

    parameter = adapter.InsertCommand.Parameters.Add("@Identity", SqlDbType.Int, 0, "CategoryID");

    parameter.Direction = ParameterDirection.Output;

  4. SqlParameter parameter = adapter.InsertCommand.Parameters.Add("@RowCount", SqlDbType.Int);

parameter.Direction = ParameterDirection.Output;

parameter = adapter.InsertCommand.Parameters.Add("@Identity", SqlDbType.Int, 0, "CategoryID");

parameter.Direction = ParameterDirection.ReturnValue


Answer: C


QUESTION: 321

The application populates a DataSet object by using a SqlDataAdapter object. You use the DataSet object to update the Categories database table in the database. You write the following code segment. (Line numbers are included for reference only.)

  1. SqlDataAdapter dataAdpater = new SqlDataAdapter("SELECT CategoryID, CategoryName FROM Categories", connection);

  2. SqlCommandBuilder builder = new SqlCommandBuilder(dataAdpater); 03 DataSet ds = new DataSet();

  1. dataAdpater.Fill(ds);

  2. foreach (DataRow categoryRow in ds.Tables[0].Rows)

  3. {

  4. if (string.Compare(categoryRow["CategoryName"].ToString(), searchValue, true) == 0)

  5. {

09

  1. }

  2. }

  3. dataAdpater.Update(ds);

You need to remove all the records from the Categories database table that match the value of the searchValue variable. Which line of code should you insert at line 09?


  1. categoryRow.Delete();

  2. ds.Tables[0].Rows.RemoveAt(0);

  3. ds.Tables[0].Rows.Remove(categoryRow);

  4. ds.Tables[0].Rows[categoryRow.GetHashCode()].Delete();


Answer: A


QUESTION: 322

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The application connects to a Microsoft SQL Server 2008 database. You must to retrieve a connection string. Wich the correct form.


  1. string connectionString = ConfigurationSettings.AppSettings["connectionString"];

  2. string connectionString = ConfigurationManager.AppSettings["connectionString"];

  3. string connectionString = ApplicationManager.ConnectionStrings["connectionString"];

  4. string connectionString = ConfigurationManager.ConnectionStrings["connectionString"].ConnectionString;


Answer: D


QUESTION: 323

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The application connects to a Microsoft SQL Server 2008 database. The application uses a Microsoft ADO.NET

SQL Server managed provider.

"Data Source=myServerAddress; Initial Catalog=myDataBase; User Id=myUsername; Password=secret;"

You need to ensure that the database credentials are secure. Which the correct Propertie to insert.


  1. Integrated Security=SSPI;

  2. Persist Security Info=true;

  3. Persist Security Info=false;

  4. Integrated Security=false;


Answer: C


Explanation:

Seen in exam Persist Security Info Default: 'false' When set to false or no (strongly recommended), security-sensitive information, such as the password, is not returned as part of the connection if the connection is open or has ever been in an open state. Resetting the connection string resets all connection string values including the password. Recognized values are true, false, yes, and no.


QUESTION: 324

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create a multi- tier application. You use Microsoft ADO.NET Entity Data Model (EDM) to model entities. The model contains entities named SalesOrderHeader and SalesOrderDetail. For performance considerations in querying SalesOrderHeader, you detach SalesOrderDetail entities from ObjectContext. You need to ensure that changes made to existing nSalesOrderDetail entities updated in other areas of your application are persisted to the database. Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)


  1. Set the MergeOption of SalesOrderDetail to MergeOptions.OverwriteChanges.

  2. Re-attach the SalesOrderDetail entities.

  3. Set the MergeOption of SalesOrderDetail to MergeOptions.NoTracking.

  4. Call ObjectContext.ApplyOriginalValue.

  5. Call ObjectContext.ApplyCurrentValue.


Answer: B, D


QUESTION: 325

You have been assigned the task of writing code that executes an Entity SQL query that returns entity type objects that contain a property of a complex type. You need to fix line 12 -

Choose the correct line of code

01 using (EntityCommand cmd = conn.CreateCommand()) 02 {

  1. cmd.CommandText = esqlQuery;

  2. EntityParameter param = new EntityParameter(); 05 param.ParameterName = "id";

  1. param.Value = 3;

  2. cmd.Parameters.Add(param);

  3. using (EntityDataReader rdr = cmd.ExecuteReader(CommandBehavior.SequentialAccess))

  4. {

  5. while (rdr.Read())

  6. {

12

13 Console.WriteLine("Email and Phone Info:"); 14 for (int i = 0; i < nestedRecord.FieldCount; i++) 15 {

16 Console.WriteLine(" " + nestedRecord.GetName(i) + ": " + nestedRecord.GetValue(i)); 17 }

  1. }

  2. }


  1. ComplexDataRecord nestedRecord = rdr["EmailPhoneComplexProperty"];

  2. DbDataRecord nestedRecord = rdr["EmailPhoneComplexProperty"];

  3. DataSet nestedRecord = rdr["EmailPhoneComplexProperty"] as ComplexDataSet

  4. DbDataRecord nestedRecord = rdr["EmailPhoneComplexProperty"] as DbDataRecord;


Answer: D


Reference:

msdn.microsoft.com/en-us/library/bb896329.aspx


QUESTION: 326

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The application connects to a Microsoft SQL Server 2008 database. SQLConnection conn = new SQLConnection(connectionString);

conn.Open();

SqlTransaction tran = db.BeginTransaction(IsolationLevel. ...);

...

You must retrieve not commited records originate from various transactions. Which method should you use?


  1. Serializable

  2. RepeatableRead

  3. ReadCommited

  4. ReadUncommited


Answer: D


QUESTION: 327

The application contains following XML document.

<feed>

<title>Products</title>

<entry>

<title>Entry title 1</title>

<author>Author 1</author>

<content>

<properties>

<description>some description</description>

<notes>some notes</notes>

<comments>some comments</comments>

</properties>

</content>

</entry>

...

</feed>

You plan to add localizationfeatures to the application. You add the following code segment:

public IEnumerable <XNode> GetTextNodesForLocalization(XDocument doc)

{

-- empty line here return from n in nodes

where n.NodeType = XmlNodeType.Text select n;

}

You need to ensure that the GetTextNodeForLocalization method returns all the XML text nodes of the XML document. Which code segment should you inser at the empty line?


  1. IEnumerable <XNode> nodes = doc.Descendants;

  2. IEnumerable <XNode> nodes = doc.Nodes();

  3. IEnumerable <XNode> nodes = doc.DescendantNodes;

  4. IEnumerable <XNode> nodes = doc.NodesAfterSelf;


Answer: C


QUESTION: 328

Ensure that SSDL can be modified without rebuilding application.


  1. res://*/Model.csdl | ... (rest of files) copy to output directory

  2. .(backslash)Model.csdl | ... (rest of files) embeded in output assembly

  3. res://*/Model.csdl | ... (rest of files) embeded in output assembly

  4. .(backslash)Model.csdl | ... (rest of files) copy to output directory


Answer: D

QUESTION: 329

You define a foreign key between the Customers and Orders tables in the database. You need to ensure that when you delete a customer record, the corresponding order records are deleted. You want to achieve this goal by using the minimum amount of development effort. What should you do?


  1. Remove the foreign key between the Customers and Orders tables.

  2. Use the ExecuteDynamicDelete method of the DataContext object.

  3. Override the Delete operation of the customer entity.

  4. Modify the foreign key between the Customers and Orders tables to enable the ON DELETE CASCADE option.


Answer: D

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