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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 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 .Distinct() .GroupBy(p => p) .Select(g => Tuple.Create(g.Count(), g.Key));
• D. IEnumerable<Tuple<int, Part>> result = part.Children .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));

You use Microsoft Visual Studio 2010 and the Microsoft .NET Framework 4.0 to create an application.
The application connects to a Microsoft SQL Server database. The application uses DataContexts to query
the database.
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?

• A. Remove the foreign key between the Customers and Orders tables.
• B. Override the Delete operation of the customer entity.
• C. Modify the foreign key between the Customers and Orders tables to enable the ON DELETE CASCADE option.
• D. Use the ExecuteDynamicDelete method of the DataContext object.

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
FROM dbo.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?

• A. 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;
• B. 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;
• C. 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;
• D. 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;

How do you call a model-defined function as static method on a custom class?

• A. Add a class to your application with a static method that does the following: Apply an EdmFunctionAttribute to the method and ensure it accepts IEntityWithRelationships argument and returns the results of the Execute method that is returned by the Provider property.
• B. Add a class to your application with a static method that does the following: Apply an EdmFunctionAttribute to the method and ensure it accepts and returns the results of the Execute method that is returned by the Provider property.
• C. Add a class to your application with a static method that does the following: Apply an EdmFunctionAttribute to the method and ensure it accepts ICollection argument and returns the results of the Execute method that is returned by the Provider property.
• D. Add a class to your application with a static method that does the following: Apply an EdmFunctionAttribute to the method and ensure it accepts an IQueryable argument and returns the results of the Execute method that is returned by the Provider property.

You use Microsoft .NET Framework 4.0 to develop an application that connects to two separate Microsoft
SQL Server 2008 databases.
The Customers database stores all the customer information, and the Orders database stores all the order
information.
The application includes the following code. (Line numbers are included for reference only.)
01 try
02 {
03 conn.Open();
04 tran = conn.BeginTransaction("Order");
05 SqlCommand cmd = new SqlCommand();
06 cmd.Connection = conn;
07 cmd.Transaction = tran;
08 tran.Save("save1");
09 cmd.CommandText = "INSERT INTO [Cust].dbo.Customer " + "(Name,
PhoneNumber) VALUES ('Paul Jones', " + "'404-555-1212')";
10 cmd.ExecuteNonQuery();
11 tran.Save("save2");
12 cmd.CommandText = "INSERT INTO [Orders].dbo.Order " + "(CustomerID)
VALUES (1234)";
13 cmd.ExecuteNonQuery();
14 tran.Save("save3");
15 cmd.CommandText = "INSERT INTO [Orders].dbo." + "OrderDetail (OrderlD,
ProductNumber) VALUES" + "(5678, 'DC-6721')";
16 cmd.ExecuteNonQuery();
17 tran.Commit();
18 }
19 catch (Exception ex)
20 {
21 ...
22 }
You run the program, and a timeout expired error occurs at line 16. You need to ensure that the customer
information is saved in the database.
If an error occurs while the order is being saved, you must roll back all of the order information and save the
customer information.
Which line of code should you insert at line 21?

• A. tran.Rollback();
• B. tran.Rollback(); tran.Commit();
• C. tran.Rollback("save2");
• D. tran.Rollback("save2"); tran.Commit();