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Exam Code: 70-516
Exam Name: TS: Accessing Data with Microsoft .NET Framework 4
Certification Provider: Microsoft
Corresponding Certifications: MCPD, MCPD: Web Developer 4, MCPD: Windows Developer 4, MCTS, MCTS: Microsoft .NET Framework 4, Data Access

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QUESTION 241
The application must provide a component part list for any product.
The component part list must give the quantity of each distinct part that is required to manufacture that product.
You need to create a LINQ expression that delivers a result of type IEnumerable<Tuple<int, Part>> to meet the requirements.
Which expression should you use?

A.    IEnumerable < Tuple < int , Part>> result = part.Descendants . GroupBy (p => p).
Select(g => Tuple.Create ( g.Count (), g.Key ));
B.    IEnumerable < Tuple < int , Part>> result = part.Descendants . ToDictionary (c => c).
Select(d => Tuple.Create (D.Value.Children.Count (),D.Key ));
C.    IEnumerable < Tuple < int , Part>> result = part.Children . GroupBy (p => p).Select(g => Tuple.Create ( g.Count (), g.Key ));
D.    IEnumerable < Tuple < int , Part>> result = part.Children .Distinct(). GroupBy (p => p).
Select(g => Tuple.Create ( g.Count (), g.Key ));
E.    IEnumerable < Tuple < int , Part>> result = part.Descendants .Distinct(). GroupBy (p => p) .Select(g => Tuple.Create ( g.Count (), g.Key ));

Answer: A

QUESTION 242
You have a LINQ to SQL model.
You create an entity named Employee by dragging a table from Server Explorer to a design surface named MyStore.dbml.
You need to identify the class definition of the Employee class.
Which class definition should you identify?

A.    public partial class Employee : EntityRef
B.    public partial class Employee : INotifyPropertyChanging, INotifyPropertyChanged
C.    public partial class Employee : EntitySet
D.    public partial class Employee : DataContext

Answer: B

QUESTION 243
Drag and Drop Question
You generate an Entity Data Model (EDM) named ADatabaseEntities from a Microsoft SQL Server database that contains a table named Customer.
Customer contains a column named Name.
You need to develop a method to update the Name column of the first entry in the Customer table.
What should you do? (Develop the solution by selecting and ordering the required code snippets. You may not need all of the code snippets.)

Answer:

QUESTION 244
Drag and Drop Question
You have a method named updateCustomers that updates a DataTable.
You need to develop a method that meets the following requirements:
Takes a DataTable as a parameter
Calls updateCustomers by using the DataTable
Returns false if updateCustomers updates one of the rows in the DataTable with a value that contains @ in the FirstName column.
What code should you use? (To answer, drag the appropriate elements to the correct locations. Each element may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.)

Answer:

QUESTION 245
You use Microsoft .NET Framework 4 to develop an application that connects to a Microsoft SQL Server 2008 database.
You add the following stored procedure to the database.
CREATE PROCEDURE dtao.InsertTag
BName nvarchar (15)
AS
INSERT INTO Tags (Name) VALUES(@Name)
RETURN @@ROWCOUNT
You need to invoke the stored procedure by using an open SqlConnection named conn.
Which code segment should you use?

A.    Dim cmd As SqlCommand =new SqlCommand(“EXEC InsertTag”, conn)
cmd.CommandType = CommandType.Text
cmd.Parameters.AddWithValue(“eName”, “New Tag 1”)
cmd.ExecuteNonQuery()
B.    Dim cmd As SqlCommand =new SqlCommand(“EXEC InsertTag”, conn)
cmd.CommandType = CommandType.StoredProcedure
cmd.Parameters.AddWithValue(“eName”, “New Tag 1”)
cmd.ExecuteNonQuery()
C.    Dim cmd As SqlCommand = New SqlCommand(“InsertTag”, conn)
cmd.CommandType = CommandType.Text
cmd.Parameters.AddWithValue(“BName”, “New Tag 1”)
cmd.ExecuteNonQuery()
D.    Dim cmd As SqlCommand = New SqlCommand (“InsertTag”, conn)
cmd.CommandType = CommandType. StoredProcedure
cmd. Parameters.AddllithValue (“GName”, “New Tag 1”)
cmd.ExecuteNonQuery()

Answer: D
Explanation:
http://msdn.microsoft.com/en-us/library/yy6y35y8(v=vs.71).aspx

QUESTION 246
You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The apphcation connects to a Microsoft SQL Server database.
The application stores user names and passwords in the database.
You need to ensure mat users cannot reao passwards extracted irom the database.
What should you do?

A.    Encrypt stored passwords by using the RC2CryptoServiceProvider class.
B.    Encrypt stored passwords by using the TripleDESCryptoServiceProvider class.
C.    Append a salt to the password by using the RNGCryptoServiceProvider class.
Encrypt stored passwords by using the RijndaelManaged class.
D.    Append a salt to the password by using the RNGCryptoServiceProvider class.
Hash stored passwords by using the SHA1CryptoServiceProvider class.

Answer: D
Explanation:
SHA1CryptoServiceProvider Class Computes the SHA1 hash value for the input data using the implementation provided by the cryptographic service provider (CSP).
This class cannot be inherited.
SHA1CryptoServiceProvider Class
(http://msdn.microsoft.com/en-us/library/system.security.cryptography.sha1cryptoserviceprovider.aspx)
CHAPTER 8 Developing Reliable Applications
Lesson 3: Protecting Your Data
Hashing and Salting (page 550-551)

QUESTION 247
You use Microsoft .NET Framework 4 to develop an application that connects to a Microsoft SQL Server 2008 database.
You add the following stored procedure to the database.
CREATE PROCEDURE dbo.GetClossAndStudents
AS
BEGIN
SELECT * FROM ctoo.Class
SELECT * FROM dbo.Student
END
You create a SqlConnection named conn that connects to the database.
You need to fill a DataSet from the result that is returned by the stored procedure.
The first result set must be added to a DataTable named Class, and the second result set must be added to a DataTable named Student.
Which code segment should you use?

A.    Dim ds As DataSet = New DataSet()
Dim ad As SqlDataAdapter = New SqlDataAdapter(
“GetClassAndStudents”, conn)
ad.Tab leMappings.Add(“Table”, “Class”)
ad.TableMappings.Add(“Tablel”, “Student”)
ad.Fill(ds)
B.    Dim ds As DataSet = New DataSet()
Dim ad As SqlDataAdapter = New SqlDataAdapter(
“GetClassAndStudents”, conn)
ad.MissingMappingAction = MissingMappingAction.Ignore ad.Fill(ds, “Class”) ad.Fill(ds, “Student”)
C.    Dim ds As DataSet = New DataSet()
Dim ad As SqlDataAdapter = New SqlDataAdapter(
“GetClassAndStudents”, conn)
ds. Tables . Add (“Class”)
ds.Tables.Add(“Student”) ad.Fill(ds)
D.    Dim ds As DataSet = New DataSet()
Dim ad As SqlDataAdapter = New SqlDataAdapter(
“GetClassAndStudents”, conn)
ad.Fill(ds)

Answer: A
Explanation:
Table Mapping in ADO.NET
(http://msdn.microsoft.com/en-us/library/ms810286.aspx)

QUESTION 248
Drag and Drop Question
You are developing code that creates database connection objects.
You plan to create connections by using the DbProvideFactory class.
You need to ensure that the factory creates a connection to Microsoft SQL Server.
What should you do? (To answer, drag the appropriate elements to the correct locations. Each element may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.)

Answer:

QUESTION 249
Drag and Drop Question
You need to create a connection string for a Microsoft .NET Framework 4 application that meets the following requirements:
Connects to a database named Northwind on the local Microsoft SQL Server instance
Uses Windows authentication
What connection string should you use? (To answer, drag the appropriate properties to the correct locations. Each property may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.)

Answer:

QUESTION 250
You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The application connects to a Microsoft SQL Server database.
You create the classes shown in the following exhibit.
You add the following code segment to the application. (Line numbers are included for reference only.)

A.    var query = leagues.Select(l => l.Teams.
Select(t => t.Players));
B.    var query = leagues.Select(l => l.Teams.
SelectMany(t => t.Players));
C.    var query = leagues.SelectMany(l => l.Teams.
SelectMany(t => t.Players));
D.    var query = leagues.SelectMany(l => l.Teams.
Select(t => t.Players));

Answer: C

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